Partida entre profesionales europeos con comentario

Dentro de los equipos que participan en la liga Pandanet Go European Team Championship hay varios profesionales que integran profesionales: Rusia, Ucrania, Israel, Polonia, Rumanía y Hungaria en la categoría A. En la categoría C juega Pavol Lisy en el equipo de Eslovaquia. La verdad que tiene su atractivo verles jugar partidas o revisarlas, me llaman sobre todo la atención las que juegan en esa liga.

En las finales del 2016 que se llevaron durante el 22 y 23 de julio de 2016 en San Petersburgo jugaron los equipos de Ucrania, Rusia, Francia y Rumanía. En el European Yeark Book 2016 se encuentra la partida que disputaron Ilya Shikshin 1p (Rusia) y Artem Kachanovsky 1p (Ucrania) analizada por Svetiana Shikshina. Es una partida muy interesante, tanto que la he estudiado y he decidido reproducirla en un archivo de .sgf. En un principio he traducido/interpretado los comentarios (consideré añadir más variantes para explicar lo que con comentarios detalla, por lo que es una traducción muy libre) y hasta "he jugado" ya que traté de buscar y usar la partida en un kifu en la cual ir añadiendo los comentarios y variantes, pero descubrí que tenía un error justo en la jugada 46. Espero que la analicéis, disfrutéis de los comentarios y que tenga más éxito que la anterior vez que traduje los comentarios de otra partida.

(;GM[1]FF[4]CA[UTF-8]AP[WebGoBoard:0.10.10]ST[2]SZ[19]KM[6.5]HA[0]DT[2016-07-23]PC[IGS-PandaNet]RE[Negro gana por abandono]PW[Artem Kachanowsky]PB[Ilya Shikshink]WR[1p]BR[1p]C[Esta partida fue tomada del European Yearkbook2016. Los comentarios originales o mejor dicho en los que me inspiraro para hacer una versión al españoll son de Svetlana Shikshina 3p. Versión al español por David de Dios en www.361puntos.blogspot.com];B[pp];W[dd];B[dq];W[pd];B[cf];W[fc];B[do];W[dj];B[cl] ;W[cq]C[Este movimiento es una prueba que tiene el fin de revelar las intenciones de negro. ¿Valorará más la esquina o el exterior?] (;B[er]C[Es un extraño movimiento. Es usado sólo cuando el exterior es más grande que la esquina. En estos momentos el lateral inferior es grande y es una buena respuesta al movimiento de prueba.] (;W[nq] ;B[kq]C[Es una gran idea pinzar a la piedra blanca para aprovechar la influencia.];W[qq]C[Blanco está obligado a tomar la esquina, no tiene opciones mejores. Gracias a ello negro sigue aumentando su moyo.];B[pq];W[qp];B[po];W[pr];B[or];W[qr];B[oq] ;W[qn]C[Negro tiene una zona muy amplia de influencia en la parte inferior y todavía conserva el sente.];B[bd] ;W[dg]MA[cl][cf][bd]C[Las pìedras marcadas de negro están muy bajas y blanco las presiona muy bien con esta jugada.];B[df];W[cg];B[bg];W[bh];B[bf];W[eg] ;B[ef]C[Hasta el momento han seguido el joseki ambos jugadores.];W[cc]MA[cg][dg][eg]L[fg]C[Artem es demasiado codicioso con este movimiento y comete su primer fallo grave. No debía abandonar sus tres piedras con esa forma y debería haber jugado en A.];B[fg]C[Negro castiga. Las piedras blancas tienen mala forma y son muy débiles. Negro lo aprovechará para perseguir en sente.];W[fh];B[gh];W[fi];B[gi];W[fj] ;B[hk]C[Atacando a las piedras blancas negro ha conseguido crear en sente una pared con bastante influencia en el centro y blanco no está del todo vivo.];W[em] ;B[ci]C[Ataca en un punto muy crítico, que no es lo mismo que punto vital.] (;W[di]C[Es la única opción para blanco.];B[ch] ;W[ck]MA[cl][ci][ch]C[Es un tesuji genial que convierte en miai capturar las dos piedras negras o atacar la piedra negra.];B[bj];W[cm] ;B[gm]C[Negro trata de cerrar el moyo mientras que blanco todavía trata de vivir.];W[bl];B[en];W[co];B[cp];W[dn];B[fn];W[bp];B[dp] ;W[no]C[Afortunadamente blanco acaba en sente y se dispone a reducir el moyo de negro antes de que se convierta en territorio y sea imposible remontar.];B[mp];W[pn];B[on];W[oo];B[om];W[mo] (;B[lo]C[Este hane es demasiado agresivo además de ser una jugada en gote.];W[ln];B[np];W[mm];B[ko] ;W[nk]C[Blanco puede estar más tranquilo en este momento de la partida. Ha reducido el moyo de negro y puede atacar las piedras negras.];B[pk] (;W[kn]MA[om][on]L[pl]C[Es un gran error ya que es más importante capturar las piedras negras. Si juega en A negro no podrá salvar las piedras.];B[jn] (;W[jm]C[Todavía tenía la oportunidad de capturar las piedras negras.]MA[om][on];B[im];W[in];B[jo] ;W[il]C[Fallo con el que pierde la oportunidad de capturar las piedras negras.]MA[om][on];B[km]C[Negro divide en dos el grupo de piedras blancas.];W[hm] ;B[kl]L[pl]MA[om][on]C[En este momento las variaciones para conseguir capturar las piedras marcadas en A no funciona, blanco perdería la carrera de libertades.];W[ml] ;B[ik]MA[il][jm][in][hm]C[Como resultado de la jugada 76, blanco acaba perdiendo las cuatro piedras marcadas. Aunque muertas, en la zona queda aji para blanco.];W[op];B[mq] (;W[oj]C[Movimiento muy lento, la amenaza de que las piedras negras escaparan se frenó con la jugada 80 y podía haber aprovechado a jugar más activo para dar un vuelco a la partida.];B[qi];W[qg];B[ph];W[pg];B[oh];W[og];B[nh];W[pj];B[qj];W[qo] ;B[nr] ;W[qk]L[pl]C[Error de lectura, blanco debió cortar en A.];B[ql]MA[om][on][pk]C[Negro puede seguir salvando sus piedras marcadas.];W[rk] ;B[ok]MA[pk][ok]TR[om][on]C[Tesuji. Blanco no puede capturar ahora todas las piedras, tendrá que elegir entre uno de los dos grupos de dos piedras.];W[rl];B[nj];W[mj];B[ni];W[ol];B[pl];W[pm];B[nl];W[mk] ;B[pi]C[Negro no logra sólo salvar sus piedras, sino que deja en una situación al grupo blanco ya que no tiene ojos y está flotando en el centro.];W[jk]C[Blanco quiere aprovechar las piedras muertas para conseguir algunos movimientos con sente.];B[kk];W[kj];B[li];W[mi];B[mh];W[jl];B[jj];W[ji];B[ij];W[lh] ;B[hl] ;W[kh]C[Blanco consigue escapar al centro y salvar sus piedras, pero es muy difícil remontar en puntos la partida en estos momentos.];B[mf];W[le];B[me];W[ld];B[md];W[lc];B[mc];W[lb];B[kg];W[lg] ;B[lf];W[kf];B[oc];W[pc];B[jg];W[jf];B[ig];W[nm];B[ol];W[nn] ;B[oi];W[lm];B[if];W[mb];B[od];W[oe];B[ne];W[of];B[mg] ;W[nc]C[Blanco tratará de matar al grupo negro, aunque ya está completamente vivo.] (;B[nb];W[ob];B[nd] (;W[na]C[Este intento de conectar las piedras blancas no funciona.];B[pb];W[nc];B[ii];W[ki];B[nb];W[oa];B[qb] (;W[ic]C[No tiene buenas respuestas. Tiene que juegar aquí para salvar el grupo de este lateral aunque las piedras de la esquina queden peligro.];B[pe];W[qe];B[qd];W[pf];B[qc];W[pe];B[rh];W[rd];B[rc];W[rf] ;B[sd]C[El grupo blanco no puede hacer dos ojos y blanco se rinde.]) (;W[rc]C[Si trata de fortalecer la esquina...];B[ma];W[nc];B[ke];W[je];B[nb];W[la];B[pa];W[nc];B[kd];W[jd] ;B[kc];W[jc];B[nb];W[kb] ;B[ma]C[No acaba de ser bueno para blanco esta opción.])) (;W[pb]C[Jugando aquí obtendría mejor resultado. Sin embargo, negro queda muy por encima de puntos, alrededor de 20.];B[jd];W[ke];B[hc];W[na];B[rj];W[rm];B[rh];W[rg];B[sh];W[bc] ;B[bo];W[cn];B[bq])) (;B[rj]C[Movimiento en sente de negro para vivir.];W[qm];B[rh])) (;W[pi]MA[om][on]C[Por ejemplo... ahora negro tiene dos opciones. Tratar de correr por el centro y si intenta salvar las piedras marcadas igualmente fracasa.];B[oj] ;W[qo]C[Movimiento en sente, ya visto en anteriores secuencias.];B[nr];W[pl] (;B[ol]C[Si trata de salvar las piedras...];W[ok];B[pm];W[ql];B[qm];W[pj];B[qk];W[rl];B[rm] ;W[rk]C[Queda en un intento frustrado.]) (;B[ql]C[Este hane se juega con el fin de salvar parte del grupo.];W[pm];B[oi] ;W[ph]C[Las piedras negras no están vivas y tendrán que correr ya que no pueden hacer dos ojos.]))) (;W[op]C[Es necesario hacer unos movimientos previos en sente.];B[mq];W[qo];B[nr];W[pl] ;B[mn]C[Empieaza una carrera de libertades, en apariencia se lee fea para blanco.];W[nn];B[nm];W[mn];B[ml];W[ll];B[km];W[lm];B[lk];W[kl];B[kk] ;W[jl]L[mk][nl]C[Pero gracias a que A y B son miai, las piedras negras no conseguirán salvarse.])) (;W[op]L[pl]C[Con el fin de conseguir capturar las piedras negras jugando en A, se necesita hacer primero unos movimientos en sente.];B[mq] ;W[qo]C[Negro tiene que contestar a esta jugada también y blanco consigue hacer un grupo más fuerte, evitando ser cortado por negro antes.];B[nr] ;W[pl]C[En este momento ya puede jugarse en la intersección señalada.];B[ol]C[Si negro tratara de resistirse a la captura...];W[ok];B[pm];W[ql];B[qm];W[rl];B[rm];W[pj];B[mn];W[nn];B[nm] ;W[mn];B[ml];W[ll];B[kn];W[lm];B[mk] ;W[nl]C[La secuencia es clara. El grupo de piedras negras tiene menos libertades.])) (;B[np]C[Jugando aquí consigue frenar la reducción que está haciéndole blanco y puede acabar defender en sente las dos piedras negras.]MA[om][on];W[lp];B[lq];W[mm];B[ok];W[mk];B[oi];W[mi];B[pf];W[nd];B[qd] ;W[qc];B[qe];W[rc];B[ql])) (;W[ch]C[Si blanco tratará de conectar...];B[di]L[eh]C[Negro amenaza cortar a las piedras y destruye la forma de ojo.];W[cj];B[bi];W[eh] ;B[dm]MA[hk][kq]C[Blanco no estaría vivo todavía, tiene que correr en una zona dominada por piedras negras. Muera o viva, negro estará feliz de hacerse más fuerte persiguiendo.])) (;W[dr]C[Con esta variante blanco conseguiría vivir en la esquina.];B[eq] (;W[cp];B[co];W[br] ;B[jp]L[ds]C[En vez de jugar en K4 negro podía haber jugado en A para producir un ko. El grupo de piedras blancas puede matarse en un ko, pero el número de amenazas locales y el tamaño de la esquina en comparación al lateral, hace mejor jugada K4.]) (;W[co]C[Otra opción para blanco sería jugar aquí.];B[cp];W[bp];B[dp];W[br] ;B[bo]L[jp][qf]C[Todavía blanco debe de hacer una jugada para vivir lo que permitirá a negro jugar en sente en A o B]))) (;B[cp]C[Jugar la boca del tigre es una respuesta un tanto regular. Permite jugar a blanco en sente 12 y 14] (;W[eq];B[dr];W[ep];B[dp] ;W[iq]C[Esta variante permite a blanco reducir la influencia de negro en el lateral inferior ya que consolida el grupo.]) (;W[dr]C[Suele ser más común esta variante, blanco vuelve a jugar de prueba y da a negro la posibilidad de elegir entre mantener la influencia o la esquina.];B[eq]L[bq]C[Si negro decide mantener la influencia, blanco podría hacer tenuki y mantener la posibilidad de jugar en A hasta fases más avanzadas del juego para vivir.])))

15 años sin Hans Pietsch

El 16 de enero se cumplen 15 años de la muerte de Hans Pietsch, tenemos la costumbre de no olvidar y más con las circunstancias que rodean su muerte (no dista de ser una imprudencia por resistirse a un asalto en un país violento y más en una zona desamparada) al estar en "misión" de difundir el Go. Con el fin de recordarle, en esta ocasión comparto unas 13 partidas que jugó Sorin Gherman en una liga de insei a las cuales él hizo los comentarios:

La siguiente partida es entre Sorin Gherman vs Lee:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Lee]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ] ;B[dp]CR[dp] ;W[pd]CR[pd] ;B[dd]CR[dd] ;W[pp]CR[pp] ;B[nc]CR[nc] ;W[qf]CR[qf] ;B[jd]CR[jd] ;W[cf]CR[cf] ;B[ch]CR[ch] ;W[cc]CR[cc] ;B[dc]CR[dc] ;W[cd]CR[cd] ;B[de]CR[de] ;W[df]CR[df] ;B[ce]CR[ce] ;W[be]CR[be] ;B[bd]CR[bd] ;W[bc]CR[bc] ;B[bf]CR[bf] ;W[ad]CR[ad] ;B[ef]CR[ef] ;W[bg]CR[bg] ;B[dg]CR[dg] ;W[af]CR[af] ;B[cg]CR[cg] ;W[bf]CR[bf] ;B[fg]CR[fg] ;W[eh]CR[eh] ;B[eg]CR[eg] ;W[fq]CR[fq] ;B[dn]CR[dn] ;W[jp]CR[jp] ;B[go]CR[go] ;W[hp]CR[hp] ;B[in]CR[in] ;W[kn]CR[kn] ;B[qq]CR[qq] ;W[pq]CR[pq] ;B[qp]CR[qp] (;W[qo]LB[kl:B][qn:A]CR[qo]C[White should try to get sente here with A (R6) and play at B (L8). See the variation diagram.] ;B[ro]CR[ro] ;W[qn]CR[qn] ;B[rn]CR[rn] ;W[qm]CR[qm] ;B[pr]CR[pr] ;W[or]CR[or] ;B[qr]CR[qr] ;W[nq]CR[nq] (;B[ne]LB[km:A]CR[ne]C[Should be at A (L7).] (;W[pb]LB[jl:A]CR[pb]C[White should play at A (K8) instead.] ;B[km]CR[km] ;W[lm]CR[lm]C[It's better for white not to play the exchanges that followed in the game if he plans to invade the left side.] ;B[kl]CR[kl] ;W[jn]CR[jn] ;B[im]CR[im] ;W[ll]CR[ll] ;B[kk]CR[kk] ;W[cj]CR[cj] (;B[bh]LB[dk:A]CR[bh]C[Black should play at A (D9) instead and let white connect underneath, this should be enough for him. The game commentary ends here.] ;W[cm]CR[cm] ;B[cn]CR[cn] ;W[bi]CR[bi] ;B[ah]CR[ah] ;W[dm]CR[dm] ;B[bk]CR[bk] ;W[bn]CR[bn] ;B[bo]CR[bo] ;W[ck]CR[ck] ;B[bm]CR[bm] ;W[bl]CR[bl] ;B[am]CR[am] ;W[bj]CR[bj] ;B[dl]CR[dl] ;W[el]CR[el] ;B[em]CR[em] ;W[cl]CR[cl] ;B[ek]CR[ek] ;W[fl]CR[fl] ;B[fk]CR[fk] ;W[gk]CR[gk] ;B[fm]CR[fm] ;W[gl]CR[gl] ;B[gj]CR[gj] ;W[hj]CR[hj] ;B[fj]CR[fj] ;W[dk]CR[dk] ;B[hi]CR[hi] ;W[il]CR[il] ;B[ij]CR[ij] ;W[hk]CR[hk] ;B[ii]CR[ii] ;W[jm]CR[jm] ;B[lj]CR[lj] ;W[hn]CR[hn] ;B[ob]CR[ob] ;W[oc]CR[oc] ;B[nb]CR[nb] ;W[of]CR[of] ;B[nf]CR[nf] ;W[ng]CR[ng] ;B[mg]CR[mg] ;W[og]CR[og] ;B[rm]CR[rm] ;W[mh]CR[mh] ;B[lh]CR[lh] ;W[nd]CR[nd] ;B[md]CR[md] ;W[od]CR[od] ;B[mf]CR[mf] ;W[mc]CR[mc] ;B[lc]CR[lc] ;W[db]CR[db] ;B[eb]CR[eb] ;W[cb]CR[cb] ;B[ea]CR[ea] ;W[dr]CR[dr]C[Subsequent moves omitted. White won by resign.]) (;B[dk]CR[dk]C[Give a little, but keep the lead.])) (;W[jl]CR[jl])) (;B[km]CR[km]C[Most important point, at the junction of both white's and black moyos.])) (;W[qn]CR[qn] ;B[rn]CR[rn] ;W[kl]CR[kl]C[Very important strategical point.]))

La siguiente partida es entre Sato vs Sorin Gherman:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sato]PB[Sorin Gherman]DT[1994-12-10]EV[insei league, B class]PC[Igo Kenshu Center, Chiba, Japan]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+Resign] ;B[pd]CR[pd] ;W[cp]CR[cp] ;B[pp]CR[pp] ;W[dc]CR[dc] ;B[ep]CR[ep] ;W[eq]CR[eq] ;B[fq]CR[fq] ;W[dq]CR[dq] ;B[fp]CR[fp] ;W[cn]CR[cn] ;B[jp]CR[jp] ;W[qj]CR[qj] ;B[ql]CR[ql] ;W[qf]CR[qf] ;B[qh]CR[qh] ;W[of]CR[of] ;B[nd]CR[nd] ;W[pi]CR[pi] ;B[qe]CR[qe] ;W[rf]CR[rf] ;B[jc]CR[jc] ;W[qq]CR[qq] ;B[pq]CR[pq] ;W[qp]CR[qp] ;B[qn]CR[qn] ;W[rn]CR[rn] ;B[rm]CR[rm] ;W[pr]CR[pr] ;B[or]CR[or] ;W[qr]CR[qr] ;B[po]CR[po] ;W[nr]CR[nr] ;B[os]CR[os] ;W[qo]CR[qo] ;B[nq]CR[nq] ;W[pn]CR[pn] ;B[qm]CR[qm] ;W[ph]CR[ph] ;B[ro]CR[ro] ;W[rp]CR[rp] ;B[sn]CR[sn] ;W[sr]CR[sr] (;B[de]LB[ce:A]CR[de]C[Too mild here: black should better play keima kakari with A (C15).] ;W[ce]CR[ce] ;B[dd]CR[dd] ;W[cd]CR[cd] ;B[ec]CR[ec] ;W[cf]CR[cf] ;B[db]CR[db] ;W[cc]CR[cc] ;B[fd]CR[fd] ;W[qc]CR[qc] ;B[pc]CR[pc] ;W[rd]CR[rd] ;B[em]CR[em] ;W[dl]CR[dl] ;B[el]CR[el] ;W[dk]CR[dk] ;B[ek]CR[ek] ;W[jn]CR[jn] ;B[jl]CR[jl] ;W[hr]CR[hr] ;B[gr]CR[gr] ;W[lp]CR[lp] (;B[ko]LB[jq:A]CR[ko]C[Should attack everything with A (K3).] ;W[mq]CR[mq] ;B[np]CR[np] ;W[jq]CR[jq] ;B[iq]CR[iq] ;W[kp]CR[kp] ;B[jo]CR[jo] ;W[ir]CR[ir] (;B[lo]LB[hq:A]CR[lo]C[It's bigger to block at A (H2) instead.] ;W[hq]CR[hq] ;B[kq]CR[kq] ;W[ip]CR[ip] (;B[lq]LB[kr:A]CR[lq]C[At A (L2) is not only bigger, but is also attacking white.] ;W[kr]CR[kr] ;B[lr]CR[lr] ;W[ls]CR[ls] ;B[mp]CR[mp] ;W[hn]CR[hn] ;B[dj]CR[dj] ;W[bk]CR[bk] ;B[er]CR[er] ;W[dr]CR[dr] ;B[do]CR[do] ;W[co]CR[co] (;B[eg]LB[cb:A]CR[eg]C[Black's potential is not so big anyway: should go for profit with A (C18) instead. The game commentary ends here.] ;W[hl]CR[hl] ;B[im]CR[im] ;W[in]CR[in] ;B[dm]CR[dm] ;W[cm]CR[cm] ;B[hm]CR[hm] ;W[gm]CR[gm] ;B[gn]CR[gn] ;W[go]CR[go] ;B[fn]CR[fn] ;W[ie]CR[ie] ;B[je]CR[je] ;W[ld]CR[ld] ;B[nf]CR[nf] ;W[oe]CR[oe] ;B[ne]CR[ne] ;W[lf]CR[lf] ;B[og]CR[og] ;W[jf]CR[jf] ;B[ke]CR[ke] ;W[le]CR[le] ;B[kf]CR[kf] ;W[jd]CR[jd] ;B[kd]CR[kd] ;W[kc]CR[kc] ;B[kg]CR[kg] ;W[id]CR[id] ;B[jb]CR[jb] ;W[lc]CR[lc] ;B[hc]CR[hc] ;W[lg]CR[lg] ;B[kh]CR[kh] ;W[lh]CR[lh] ;B[pf]CR[pf] ;W[pg]CR[pg] ;B[pe]CR[pe] ;W[qb]CR[qb] ;B[nh]CR[nh] ;W[ki]CR[ki] ;B[ig]CR[ig] ;W[ni]CR[ni] ;B[mb]CR[mb] ;W[kl]CR[kl] ;B[gl]CR[gl] ;W[jm]CR[jm] ;B[il]CR[il] ;W[jk]CR[jk] ;B[hk]CR[hk] ;W[oh]CR[oh] ;B[ng]CR[ng] ;W[ob]CR[ob] ;B[pb]CR[pb] ;W[pa]CR[pa] ;B[oa]CR[oa] ;W[na]CR[na] ;B[ma]CR[ma] ;W[kb]CR[kb] ;B[oc]CR[oc] ;W[ja]CR[ja] ;B[re]CR[re] ;W[se]CR[se] ;B[qd]CR[qd] ;W[nc]CR[nc] ;B[od]CR[od] ;W[rc]CR[rc] ;B[qg]CR[qg] ;W[qi]CR[qi] ;B[mi]CR[mi] ;W[ic]CR[ic]C[Subsequent moves omitted: white won by resingn.]) (;B[cb]CR[cb]C[Go for profit: the center is not so big anymore.])) (;B[kr]CR[kr]C[Attack and make profit.])) (;B[hq]CR[hq]C[Bigger than M5.])) (;B[jq]CR[jq]C[Most severe attacking move: black aims to kill every white stone in the area.])) (;B[ce]CR[ce]C[With more substance.]))

La siguiente partida es entre Norman Chadwick vs Sorin Gherman:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Norman Chadwick]PB[Sorin Gherman]DT[1995-02-19]EV[insei league, C class]PC[Igo Kenshu Center, Chiba, Japan]C[Norman Chadwick was the oldest insei at that time: he was almost 40. He's a Canadian, and he had already been an insei for at least 3-4 years at the time I came to Japan. There was no age limit for non-Asian inseis. For Asians, the age limt it 18. Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[B+Resign] ;B[pd]CR[pd] ;W[dp]CR[dp] ;B[pp]CR[pp] ;W[dd]CR[dd] ;B[pj]CR[pj] ;W[jd]CR[jd] ;B[jp]CR[jp] ;W[dj]CR[dj] ;B[jj]CR[jj] ;W[nd]CR[nd] ;B[pf]CR[pf] ;W[gp]CR[gp] ;B[ho]CR[ho] ;W[mj]CR[mj]C[This goes a little bit too deep, it's risky.] (;B[mg]LB[li:A]CR[mg]C[Too vague: should punish white's deep invasion with A (M11).] ;W[ki]CR[ki] ;B[ji]CR[ji] ;W[kh]CR[kh] ;B[kj]LB[mh:A]CR[kj]C[Exchanging this for white A is quite painfull for black, but no other move was suggested: black doesn't seem to have much choice here.] ;W[mh]CR[mh] ;B[nh]CR[nh] ;W[lj]CR[lj] ;B[ld]CR[ld] ;W[jf]CR[jf] ;B[cf]CR[cf] ;W[df]CR[df] ;B[dg]CR[dg] ;W[ef]CR[ef] ;B[ce]CR[ce] ;W[cd]CR[cd] ;B[eg]CR[eg] ;W[fg]CR[fg] (;B[ch]LB[ei:A]CR[ch]C[Should be at A (E11) instead. See the variation diagram.] (;W[fd]LB[eh:A]CR[fd]C[White can and should play more aggresively, at A (E12). See the variation diagram.] ;B[fh]CR[fh] ;W[gh]CR[gh] ;B[gg]CR[gg] ;W[ff]CR[ff] ;B[fi]CR[fi] ;W[hh]CR[hh] ;B[cn]CR[cn]C[Black is ahead after this move.] ;W[dn]CR[dn] ;B[dm]CR[dm] ;W[cm]CR[cm] ;B[bo]CR[bo] ;W[cp]CR[cp] ;B[cl]CR[cl] ;W[bm]CR[bm] ;B[bl]CR[bl] ;W[em]CR[em] ;B[dl]CR[dl] ;W[mp]CR[mp] (;B[bq]LB[pn:A]CR[bq]C[Very small, and is also not sente: white is safe without answering. For these reasons, black should better answer honestly at A (Q6).] ;W[bp]CR[bp] ;B[ap]CR[ap] ;W[bn]CR[bn] ;B[co]CR[co] ;W[do]CR[do] ;B[ao]CR[ao] ;W[pn]CR[pn] (;B[np]LB[no:A][oo:B]CR[np]C[Not good, it gives white the chance to create complications with A (O5): better play at B (P5) to get into the center and keep the 2 white groups separated (and also keep the game simple).] (;W[mo]LB[no:A]CR[mo]C[White should hane at A (O5) and try to encircle black. The game commentary ends. here.] ;B[no]CR[no] ;W[nn]CR[nn] ;B[mn]CR[mn] ;W[ln]CR[ln] ;B[mm]CR[mm] ;W[nm]CR[nm] ;B[lm]CR[lm] ;W[kp]CR[kp] ;B[kn]CR[kn] ;W[jq]CR[jq] ;B[iq]CR[iq] ;W[lq]CR[lq] ;B[jr]CR[jr] ;W[nq]CR[nq] ;B[oq]CR[oq] ;W[kr]CR[kr] ;B[ko]CR[ko] ;W[nr]CR[nr] ;B[or]CR[or] ;W[kq]CR[kq] ;B[go]CR[go] ;W[qo]CR[qo] ;B[qp]CR[qp] ;W[rj]CR[rj] ;B[fp]CR[fp] ;W[fq]CR[fq] ;B[gq]CR[gq] ;W[fo]CR[fo] ;B[hp]CR[hp] ;W[ep]CR[ep] ;B[fr]CR[fr] ;W[gp]CR[gp] ;B[er]CR[er]C[Subsequent moves omitted:]) (;W[no]CR[no]C[Severe: encircles black and connect own groups together.])) (;B[oo]CR[oo]C[Simple, proper move.])) (;B[pn]CR[pn]C[Very big, normal move.])) (;W[eh]CR[eh]C[Severe. Black cannot cut...] ;B[de]CR[de] ;W[ee]CR[ee] ;B[ed]CR[ed] ;W[dh]CR[dh] ;B[cg]CR[cg] ;W[ci]CR[ci] ;B[fd]CR[fd] ;W[ge]CR[ge]C[Black cannot capture white's corner stones.])) (;B[ei]CR[ei]C[Correct shape.] ;W[ej]CR[ej] ;B[fh]CR[fh] ;W[ff]CR[ff]C[Black is sente now and will play now something in the lower-left corner (no particular move was suggested).])) (;B[li]CR[li]C[Severe attack.]))

La siguiente partida es entre Sorin Gherman vs Takekyo Isamu:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Takekyo Isamu]PB[Sorin Gherman]DT[1995-06-24]EV[insei league, C class]PC[Igo Kenshu Center]C[Takekyo Isamu ( http://www.nihonkiin.or.jp/player/htm/ki000377.htm ) is now (2002) pro 2 dan. He also used to live at the Igo Kenshu Center as an insei. Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+1.50] ;B[pd]CR[pd] ;W[dp]CR[dp] ;B[pp]CR[pp] ;W[dc]CR[dc] ;B[de]CR[de] ;W[ce]CR[ce] ;B[cf]CR[cf] ;W[cd]CR[cd] ;B[df]CR[df] ;W[fc]CR[fc] ;B[dj]CR[dj] ;W[qj]CR[qj] ;B[cn]CR[cn] ;W[fq]CR[fq] ;B[ql]CR[ql] ;W[qf]CR[qf] ;B[qh]CR[qh] ;W[of]CR[of] ;B[qe]CR[qe] ;W[rf]CR[rf] ;B[nc]CR[nc] ;W[pi]CR[pi] ;B[jp]CR[jp] ;W[lq]CR[lq] ;B[nq]CR[nq] ;W[lo]CR[lo] ;B[jn]CR[jn] ;W[lm]CR[lm] ;B[jl]CR[jl] ;W[lk]CR[lk] ;B[qo]CR[qo] ;W[jj]CR[jj] ;B[en]CR[en] ;W[lc]CR[lc] ;B[re]CR[re] ;W[hj]CR[hj] (;B[cq]LB[ge:A]CR[cq]C[Black should play at A (G15) instead, to prevent white from building a big moyo on the upper side.] ;W[cp]CR[cp] (;B[dq]LB[bp:A]CR[dq]C[Should hane at A (B4) instead.] ;W[bq]CR[bq] ;B[br]CR[br] ;W[bp]CR[bp] ;B[fr]CR[fr] (;W[eq]LB[ep:A]CR[eq]C[Should be at A (E4).] ;B[er]CR[er] ;W[gq]CR[gq] ;B[ar]CR[ar] ;W[io]CR[io] (;B[ho]LB[kp:A]CR[ho]C[Should be nozoki at A (L4) instead.] ;W[ip]CR[ip] ;B[hp]CR[hp] ;W[hq]CR[hq] ;B[in]CR[in] ;W[jq]CR[jq] ;B[jo]CR[jo] ;W[iq]CR[iq] ;B[fo]CR[fo] ;W[cl]CR[cl] (;B[cm]LB[dm:A]CR[cm]C[Should be at A (D7) instead.] ;W[dl]CR[dl] ;B[ep]CR[ep] ;W[ek]CR[ek] ;B[ej]CR[ej] ;W[fk]CR[fk] (;B[ge]LB[fj:A]CR[ge]C[Should push at A (F10).] ;W[fe]CR[fe] ;B[ff]CR[ff] ;W[fd]CR[fd] ;B[gf]CR[gf] ;W[ci]CR[ci] (;B[dh]LB[cj:A]CR[dh]C[Should cut at A (C10). White will be able to save his stones in the lower left corner, nevertheless.] ;W[gn]CR[gn] ;B[gm]CR[gm] ;W[fm]CR[fm] ;B[fn]CR[fn] ;W[fp]CR[fp] ;B[hn]CR[hn] ;W[eo]CR[eo] ;B[hl]CR[hl] ;W[fj]CR[fj] ;B[bk]CR[bk] ;W[id]CR[id] ;B[ph]CR[ph]C[This turned out to be a loss for black.] ;W[oh]CR[oh] ;B[oi]CR[oi] ;W[nh]CR[nh] ;B[oj]CR[oj] ;W[qi]CR[qi] ;B[qk]CR[qk] ;W[rh]CR[rh] ;B[ol]CR[ol] ;W[bl]CR[bl] ;B[ck]CR[ck] ;W[mr]CR[mr] ;B[nr]CR[nr] ;W[nb]CR[nb]C[White is ahead now. The game commentary ends here.] ;B[ob]CR[ob] ;W[mb]CR[mb] ;B[oc]CR[oc] ;W[if]CR[if]C[Subsequent moves not recorded: white won by 1.5 points.]) (;B[cj]CR[cj]C[Severe.])) (;B[fj]CR[fj]C[Push once more.])) (;B[dm]CR[dm]C[Correct.])) (;B[kp]CR[kp]C[Better.])) (;W[ep]CR[ep]C[Good style.])) (;B[bp]CR[bp]C[Better in this case.])) (;B[ge]CR[ge]C[Big strategical point.]))

La siguiente partida es entre Yamada vs Sorin Gherman:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Yamada]PB[Sorin Gherman]DT[1995-06-04]EV[insei league, C class]PC[Igo Kenshu Center]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+Resign] ;B[pd]CR[pd] ;W[dp]CR[dp] ;B[pp]CR[pp] ;W[dc]CR[dc] ;B[de]CR[de] ;W[ce]CR[ce] ;B[cf]CR[cf] ;W[cd]CR[cd] ;B[fq]CR[fq] ;W[cn]CR[cn] ;B[dg]CR[dg] ;W[fc]CR[fc] ;B[ck]CR[ck] ;W[iq]CR[iq] ;B[mq]CR[mq] ;W[dq]CR[dq] ;B[qj]CR[qj] ;W[qp]CR[qp] ;B[qq]CR[qq] ;W[qo]CR[qo] ;B[rq]CR[rq] ;W[po]CR[po] ;B[op]CR[op] ;W[ql]CR[ql] ;B[oj]CR[oj] ;W[ol]CR[ol] (;B[mc]LB[go:A]CR[mc]C[Big move, but it's more urgent to play at A (G5) rescuing the black stone and isolating the white stone on the lower side.] ;W[qc]CR[qc] ;B[qd]CR[qd] ;W[pc]CR[pc] ;B[oc]CR[oc] ;W[ob]CR[ob] ;B[nb]CR[nb] ;W[od]CR[od] ;B[nc]CR[nc] ;W[rd]CR[rd] ;B[re]CR[re] ;W[rc]CR[rc] ;B[qf]CR[qf] ;W[pb]CR[pb] (;B[mk]LB[go:A]CR[mk]C[Should be at A (G5).] ;W[rj]CR[rj] ;B[ri]CR[ri] ;W[rk]CR[rk] (;B[hc]LB[go:A]CR[hc]C[Again, this should be at A (G5).] ;W[oe]CR[oe] (;B[pf]LB[me:A]CR[pf]C[Should defend at A (N15) instead, much more efficiently.] ;W[jc]CR[jc] ;B[id]CR[id] ;W[ld]CR[ld] ;B[ne]CR[ne] ;W[jd]CR[jd] ;B[ie]CR[ie] ;W[me]CR[me] ;B[nd]CR[nd] ;W[jf]CR[jf] ;B[hg]CR[hg] ;W[mg]CR[mg] (;B[nf]LB[jh:A]CR[nf]C[Should play boshi at A (K12).] ;W[jh]CR[jh] ;B[mi]CR[mi] ;W[if]CR[if] ;B[hf]CR[hf] ;W[gd]CR[gd] ;B[he]CR[he] ;W[ii]CR[ii] ;B[go]CR[go] ;W[gi]CR[gi]C[White is ahead after this move. The game commentary ends here.] ;B[io]CR[io] ;W[ch]CR[ch] ;B[bg]CR[bg] ;W[cj]CR[cj] ;B[dj]CR[dj] ;W[ci]CR[ci] ;B[dk]CR[dk] ;W[fg]CR[fg] ;B[fh]CR[fh] ;W[gh]CR[gh] ;B[eh]CR[eh] ;W[gg]CR[gg] ;B[ed]CR[ed] ;W[ec]CR[ec] ;B[er]CR[er] ;W[bm]CR[bm] ;B[bl]CR[bl] ;W[dr]CR[dr] ;B[jp]CR[jp] ;W[gr]CR[gr] ;B[gq]CR[gq] ;W[fr]CR[fr] ;B[eq]CR[eq] ;W[hr]CR[hr] ;B[ds]CR[ds] ;W[kr]CR[kr] ;B[lr]CR[lr] ;W[jr]CR[jr] ;B[cr]CR[cr] ;W[fs]CR[fs] ;B[es]CR[es] ;W[br]CR[br] ;B[cq]CR[cq] ;W[bq]CR[bq] ;B[cp]CR[cp] ;W[bp]CR[bp] ;B[co]CR[co] ;W[bo]CR[bo] ;B[do]CR[do] ;W[cl]CR[cl] ;B[dl]CR[dl] ;W[cm]CR[cm] ;B[ak]CR[ak] ;W[ef]CR[ef] ;B[df]CR[df] ;W[be]CR[be]C[Subsequent moves not recorded. White won by resign.]) (;B[jh]CR[jh]C[Good direction of play.])) (;B[me]CR[me]C[Better defense.])) (;B[go]CR[go]C[Biggest move.])) (;B[go]CR[go]C[Biggest move.])) (;B[go]CR[go]C[Urgent.]))

La siguiente partida es entre Yamada vs Sorin Gherman:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Yamada]PB[Sorin Gherman]DT[1997-07-08]EV[insei league, B class]PC[Igo Kenshu Center]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+Resign] ;B[pd]CR[pd] ;W[dp]CR[dp] ;B[pp]CR[pp] ;W[dc]CR[dc] ;B[cf]CR[cf] ;W[cd]CR[cd] ;B[dj]CR[dj] ;W[nq]CR[nq] ;B[cn]CR[cn] ;W[fp]CR[fp] ;B[qn]CR[qn] ;W[kq]CR[kq] ;B[jc]CR[jc] ;W[qf]CR[qf] ;B[re]CR[re] ;W[qd]CR[qd] ;B[qe]CR[qe] ;W[pe]CR[pe] ;B[pc]CR[pc] ;W[pf]CR[pf] ;B[rd]CR[rd] ;W[ne]CR[ne] ;B[mc]CR[mc] ;W[pj]CR[pj] ;B[fc]CR[fc] ;W[fd]CR[fd] (;B[gd]LB[gc:A]CR[gd]C[Should just retreat at A (G17), which is more likely to become sente. It's also about helping white's stones as little as possible, since black is on the offensive here, white on defensive.] ;W[fe]CR[fe] ;B[ec]CR[ec] ;W[ed]CR[ed] ;B[gc]CR[gc] ;W[qq]CR[qq] ;B[pq]CR[pq] ;W[qp]CR[qp] (;B[qo]LB[qr:A]CR[qo]C[Black can play severely, at A (R2). See the variation diagram.] ;W[pr]CR[pr] ;B[or]CR[or] ;W[qr]CR[qr] ;B[oq]CR[oq] ;W[nr]CR[nr] (;B[np]LB[os:A]CR[np]C[Should resist with A (P1). See the variation diagram.] ;W[mp]CR[mp] ;B[mo]CR[mo] ;W[no]CR[no] ;B[op]CR[op] ;W[os]CR[os] ;B[nn]CR[nn] ;W[lo]CR[lo] ;B[mn]CR[mn] ;W[lp]CR[lp]C[The result in the lower-right corner is terrible for black.] ;B[bc]CR[bc] ;W[bf]CR[bf] ;B[bg]CR[bg] ;W[be]CR[be] ;B[db]CR[db] ;W[cg]CR[cg] ;B[ch]CR[ch] ;W[dg]CR[dg] ;B[bh]CR[bh] ;W[fg]CR[fg] ;B[bp]CR[bp] ;W[cq]CR[cq] ;B[dl]CR[dl] ;W[ql]CR[ql] ;B[rf]CR[rf] ;W[on]CR[on] ;B[oo]CR[oo] ;W[pn]CR[pn] ;B[po]CR[po] ;W[ol]CR[ol] ;B[nl]CR[nl] ;W[nk]CR[nk] ;B[mk]CR[mk] ;W[nj]CR[nj] ;B[rl]CR[rl] ;W[rk]CR[rk] ;B[km]CR[km] ;W[kn]CR[kn] ;B[jm]CR[jm] ;W[rg]CR[rg] ;B[jn]LB[io:A]CR[jn]C[Exchanging this for white's next move, at A (J5) is bad for black: better play nothing here for now. The game commentary ends here.] ;W[io]CR[io] ;B[jo]CR[jo] ;W[ip]CR[ip] ;B[rh]CR[rh] ;W[nc]CR[nc] ;B[nb]CR[nb] ;W[qg]CR[qg] ;B[bq]CR[bq] ;W[sf]CR[sf] ;B[nd]CR[nd] ;W[md]CR[md] ;B[oc]CR[oc] ;W[rc]CR[rc] ;B[qc]CR[qc] ;W[sd]CR[sd] ;B[me]CR[me] ;W[mf]CR[mf] ;B[le]CR[le] ;W[br]CR[br] ;B[cp]CR[cp] ;W[dr]CR[dr] ;B[rb]CR[rb] ;W[lf]CR[lf] ;B[dh]CR[dh] ;W[eg]CR[eg] ;B[mj]CR[mj] ;W[mi]CR[mi] ;B[li]CR[li] ;W[mh]CR[mh] ;B[go]CR[go] ;W[fo]CR[fo] ;B[jp]CR[jp] ;W[jq]CR[jq] ;B[gn]CR[gn] ;W[gp]CR[gp] ;B[kj]CR[kj] ;W[ke]CR[ke] ;B[ld]CR[ld] ;W[in]CR[in] ;B[im]CR[im] ;W[hm]CR[hm] ;B[hn]CR[hn] ;W[dm]CR[dm] ;B[em]CR[em] ;W[fm]CR[fm] ;B[gm]CR[gm] ;W[el]CR[el] ;B[en]CR[en] ;W[fn]CR[fn] ;B[dn]CR[dn] ;W[fl]CR[fl] ;B[hl]CR[hl] ;W[dk]CR[dk] ;B[cl]CR[cl] ;W[ck]CR[ck] ;B[ek]CR[ek] ;W[bl]CR[bl] ;B[cm]CR[cm] ;W[ej]CR[ej] ;B[fk]CR[fk] ;W[cj]CR[cj] ;B[di]CR[di] ;W[gk]CR[gk] ;B[fj]CR[fj] ;W[ei]CR[ei] ;B[gj]CR[gj] ;W[fi]CR[fi] ;B[gl]CR[gl] ;W[gi]CR[gi] ;B[hj]CR[hj] ;W[bj]CR[bj]C[Black resigns.]) (;B[os]CR[os] ;W[np]CR[np] ;B[oo]CR[oo] ;W[rp]CR[rp] ;B[mn]CR[mn]C[Better than the game for black.])) (;B[qr]CR[qr] ;W[rr]CR[rr] ;B[pr]CR[pr] ;W[rn]CR[rn] ;B[po]CR[po] ;W[ro]CR[ro] ;B[rs]CR[rs] ;W[qm]CR[qm] ;B[pm]CR[pm] ;W[ql]CR[ql] ;B[rq]CR[rq]C[This is better for black than the game.])) (;B[gc]CR[gc]C[Proper move.]))

La siguiente partida es entre Sano vs Sorin Gherman:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sano]PB[Sorin Gherman]DT[1994-03-27]EV[insei league, C class]PC[Igo Kenshu Center, Chiba, Japan]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[B+Resign] ;B[cp]CR[cp] ;W[pp]CR[pp] ;B[qd]CR[qd] ;W[ec]CR[ec] ;B[nq]CR[nq] ;W[qn]CR[qn] ;B[pr]CR[pr] ;W[qq]CR[qq] ;B[kq]CR[kq] ;W[oc]CR[oc] ;B[cd]CR[cd] ;W[de]CR[de] ;B[ce]CR[ce] ;W[df]CR[df] ;B[cg]CR[cg] ;W[jd]CR[jd] ;B[pe]CR[pe] ;W[ne]CR[ne] ;B[dg]CR[dg] ;W[eg]CR[eg] ;B[eh]CR[eh] ;W[fg]CR[fg] ;B[fh]CR[fh] ;W[gh]CR[gh] ;B[gg]CR[gg] (;W[fe]LB[hh:A]CR[fe]C[Should be nobi at A (H12).] ;B[hg]CR[hg] ;W[gi]CR[gi] ;B[dd]CR[dd] ;W[ed]CR[ed] ;B[he]CR[he] (;W[hc]LB[hd:A]CR[hc]C[Should be more ambitious, at A (H16).] ;B[cf]CR[cf] ;W[ff]CR[ff] ;B[je]CR[je] (;W[ke]LB[kd:A]CR[ke]C[Should be patient here and play nobi at A (L16).] ;B[kf]CR[kf] ;W[le]CR[le] ;B[ii]CR[ii] (;W[ej]LB[ei:A]CR[ej]C[Correct is A (E11). See the variation diagram.] ;B[ik]CR[ik] ;W[gk]CR[gk] ;B[dm]CR[dm] ;W[gm]CR[gm] ;B[db]CR[db] (;W[ie]LB[eb:A]CR[ie]C[Black's last move is not a kikashi, white need not defend against it. If white wants to defend anyway, the correct move is A (E18). The game commentary ends here.] ;B[jf]CR[jf] ;W[if]CR[if] ;B[ig]CR[ig] ;W[id]CR[id] ;B[go]CR[go] ;W[il]CR[il] ;B[jl]CR[jl] ;W[im]CR[im] ;B[hk]CR[hk] ;W[gl]CR[gl] ;B[jm]CR[jm] ;W[io]CR[io] ;B[jn]CR[jn] ;W[ho]CR[ho] ;B[gp]CR[gp] ;W[cq]CR[cq] ;B[dq]CR[dq] ;W[bp]CR[bp] ;B[co]CR[co] ;W[cr]CR[cr] ;B[dr]CR[dr] ;W[br]CR[br] ;B[bo]CR[bo] ;W[ap]CR[ap] ;B[dk]CR[dk] ;W[dj]CR[dj] ;B[ek]CR[ek] ;W[fk]CR[fk] ;B[ck]CR[ck] ;W[jk]CR[jk] ;B[kk]CR[kk] ;W[jj]CR[jj] ;B[kj]CR[kj] ;W[dh]CR[dh] ;B[di]CR[di] ;W[ei]CR[ei] ;B[ch]CR[ch] ;W[fi]CR[fi] ;B[dh]CR[dh] ;W[iq]CR[iq] ;B[jp]CR[jp] ;W[hq]CR[hq] ;B[gq]CR[gq] ;W[kr]CR[kr] ;B[lr]CR[lr] ;W[jq]CR[jq] ;B[kp]CR[kp] ;W[js]CR[js] ;B[gr]CR[gr] ;W[hr]CR[hr] ;B[pc]CR[pc] ;W[ob]CR[ob] ;B[ql]CR[ql] ;W[qr]CR[qr] ;B[ph]CR[ph] ;W[lg]CR[lg] ;B[ij]CR[ij] ;W[hi]CR[hi] ;B[rn]CR[rn] ;W[rm]CR[rm] ;B[qm]CR[qm] ;W[rl]CR[rl] ;B[pn]CR[pn] ;W[qo]CR[qo] ;B[rk]CR[rk] ;W[ro]CR[ro] ;B[sl]CR[sl] ;W[sn]CR[sn] ;B[pk]CR[pk] ;W[on]CR[on] ;B[pb]CR[pb] ;W[pa]CR[pa] ;B[od]CR[od] ;W[nd]CR[nd] ;B[nc]CR[nc] ;W[nb]CR[nb] ;B[mc]CR[mc] ;W[mb]CR[mb] ;B[lc]CR[lc] ;W[lb]CR[lb] ;B[oa]CR[oa] ;W[na]CR[na] ;B[qb]CR[qb] ;W[eb]CR[eb] ;B[cj]CR[cj] ;W[pm]CR[pm] ;B[oq]CR[oq] ;W[og]CR[og] ;B[oh]CR[oh] ;W[pg]CR[pg] ;B[qg]CR[qg] ;W[qf]CR[qf] ;B[pf]CR[pf] ;W[qh]CR[qh] ;B[rg]CR[rg] ;W[qi]CR[qi] ;B[ng]CR[ng] ;W[of]CR[of] ;B[nf]CR[nf] ;W[oe]CR[oe] ;B[qe]CR[qe] ;W[nh]CR[nh] ;B[me]CR[me] ;W[pd]CR[pd] ;B[ni]CR[ni] ;W[mf]CR[mf] ;B[mh]CR[mh] ;W[mg]CR[mg] ;B[om]CR[om] ;W[po]CR[po] ;B[ol]CR[ol]C[White resigned.]) (;W[eb]CR[eb]C[This is the locally correct move. though it's not necessary now.])) (;W[ei]CR[ei]C[Correct shape. Kikashi.] ;B[dh]CR[dh] ;W[gk]CR[gk])) (;W[kd]CR[kd]C[Correct shape.])) (;W[hd]CR[hd]C[Correct shape.])) (;W[hh]CR[hh]C[Correct.]))

La siguiente partida es entre Sorin Gherman vs Yun:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Yun]DT[1994-12-10]EV[insei league, B class]PC[Igo Kenshu Center, Chiba, Japan]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[B+2.50] ;B[cp]CR[cp] ;W[pd]CR[pd] ;B[dc]CR[dc] ;W[pp]CR[pp] ;B[eq]CR[eq] ;W[de]CR[de] ;B[ce]CR[ce] ;W[cf]CR[cf] ;B[cd]CR[cd] ;W[df]CR[df] ;B[fc]CR[fc] ;W[dj]CR[dj] ;B[qj]CR[qj] ;W[cn]CR[cn] ;B[qn]CR[qn] ;W[nq]CR[nq] ;B[bh]CR[bh] ;W[bg]CR[bg] ;B[dh]CR[dh] ;W[cj]CR[cj] ;B[bj]CR[bj] ;W[bk]CR[bk] ;B[eh]CR[eh] (;W[ge]LB[gf:A]CR[ge]C[At A (G14) is better in this case.] ;B[gg]CR[gg] ;W[ed]CR[ed] ;B[ec]CR[ec] (;W[be]LB[ie:A]CR[be]C[Should jump to A (J15).] ;B[ci]CR[ci] ;W[aj]CR[aj] ;B[bi]CR[bi] (;W[bc]LB[ie:A]CR[bc]C[Again, white should jump out to A (J15) instead.] ;B[bd]CR[bd] ;W[ad]CR[ad] ;B[fe]CR[fe] (;W[fd]LB[ff:A]CR[fd]C[At A (F14) is better.] ;B[gd]CR[gd] ;W[ff]LB[he:A]CR[ff]C[Too painful: white should try to fight with A (H15) if possible. The game commentary ends here.] ;B[he]CR[he] ;W[ee]CR[ee] ;B[hd]CR[hd] ;W[gf]CR[gf] ;B[hf]CR[hf] ;W[cc]CR[cc] ;B[dd]CR[dd] ;W[db]CR[db] ;B[nc]CR[nc] ;W[nd]CR[nd] ;B[md]CR[md] ;W[oc]CR[oc] ;B[ne]CR[ne] ;W[od]CR[od] ;B[mc]CR[mc] ;W[pf]CR[pf] ;B[eo]CR[eo] ;W[dl]CR[dl] ;B[ek]CR[ek] ;W[el]CR[el] ;B[gk]CR[gk] ;W[fj]CR[fj] ;B[fi]CR[fi] ;W[gj]CR[gj] ;B[hi]CR[hi] ;W[hj]CR[hj] ;B[ij]CR[ij] ;W[ik]CR[ik] ;B[jj]CR[jj] ;W[jk]CR[jk] ;B[kk]CR[kk] ;W[kj]CR[kj] ;B[gi]CR[gi] ;W[ki]CR[ki] ;B[jh]CR[jh] ;W[hk]CR[hk] ;B[lk]CR[lk] ;W[ql]CR[ql] ;B[og]CR[og] ;W[pi]CR[pi] ;B[pj]CR[pj] ;W[of]CR[of] ;B[ng]CR[ng] ;W[oi]CR[oi] ;B[qi]CR[qi] ;W[oj]CR[oj] ;B[ok]CR[ok] ;W[pg]CR[pg] ;B[pl]CR[pl] ;W[nf]CR[nf] ;B[mf]CR[mf] ;W[qo]CR[qo] ;B[rn]CR[rn] ;W[pn]CR[pn] ;B[ro]CR[ro] ;W[pm]CR[pm] ;B[qm]CR[qm] ;W[ol]CR[ol] ;B[pk]CR[pk] ;W[rp]CR[rp] ;B[qq]CR[qq] ;W[qp]CR[qp] ;B[rl]CR[rl] ;W[iq]CR[iq] ;B[mi]CR[mi] ;W[mj]CR[mj] ;B[lj]CR[lj] ;W[mh]CR[mh] ;B[mg]CR[mg] ;W[li]CR[li] ;B[mk]CR[mk] ;W[nj]CR[nj] ;B[om]CR[om] ;W[qh]CR[qh] ;B[on]CR[on] ;W[rq]CR[rq] ;B[lh]CR[lh] ;W[ni]CR[ni] ;B[eb]CR[eb] ;W[cb]CR[cb] ;B[kh]CR[kh] ;W[nb]CR[nb] ;B[mb]CR[mb] ;W[ob]CR[ob] ;B[mq]CR[mq] ;W[np]CR[np] ;B[kq]CR[kq] ;W[jp]CR[jp] ;B[mp]CR[mp] ;W[no]CR[no] ;B[kp]CR[kp] ;W[jn]CR[jn] ;B[ir]CR[ir] ;W[hr]CR[hr] ;B[jr]CR[jr] ;W[gq]CR[gq] ;B[hp]CR[hp] ;W[hq]CR[hq] ;B[mr]CR[mr] ;W[nr]CR[nr] ;B[ns]CR[ns] ;W[os]CR[os] ;B[ms]CR[ms] ;W[po]CR[po] ;B[or]CR[or] ;W[pr]CR[pr] ;B[ps]CR[ps] ;W[qr]CR[qr] ;B[bo]CR[bo] ;W[bn]CR[bn] ;B[fp]CR[fp] ;W[fn]CR[fn] ;B[go]CR[go] ;W[ko]CR[ko] ;B[io]CR[io] ;W[jo]CR[jo] ;B[fr]CR[fr] ;W[ea]CR[ea] ;B[gb]CR[gb] ;W[ma]CR[ma] ;B[la]CR[la] ;W[na]CR[na] ;B[ga]CR[ga] ;W[nl]CR[nl] ;B[nk]CR[nk] ;W[mm]CR[mm] ;B[ej]CR[ej] ;W[fk]CR[fk] ;B[gn]CR[gn] ;W[gm]CR[gm] ;B[en]CR[en] ;W[em]CR[em] ;B[an]CR[an] ;W[am]CR[am] ;B[ao]CR[ao] ;W[cm]CR[cm] ;B[al]CR[al] ;W[bm]CR[bm]C[Subsequent moves not recorded. Black won by 2.5 p.]) (;W[ff]CR[ff]C[Correct shape.])) (;W[ie]CR[ie]C[Vital point.])) (;W[ie]CR[ie]C[Running into the center is very important in this kind of fights.])) (;W[gf]CR[gf]C[Better than the game.]))

La siguiente partida es entre Sorin Gherman vs Takekyo Isamu:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Takekyo Isamu]DT[1995-02-26]EV[insei league, C class]PC[Igo Kenshu Center, Chiba, Japan]C[Takekyo Isamu ( http://www.nihonkiin.or.jp/player/htm/ki000377.htm ) is now (2002) pro 2 dan. He also used to live at the Igo Kenshu Center as an insei. Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[B+11.50] ;B[cp]CR[cp] ;W[pd]CR[pd] ;B[dc]CR[dc] ;W[pp]CR[pp] ;B[eq]CR[eq] ;W[de]CR[de] ;B[ce]CR[ce] ;W[cf]CR[cf] ;B[cd]CR[cd] ;W[df]CR[df] ;B[fc]CR[fc] ;W[dj]CR[dj] ;B[qj]CR[qj] ;W[cn]CR[cn] ;B[nq]CR[nq] ;W[qn]CR[qn] ;B[qg]CR[qg] ;W[qe]CR[qe] ;B[mc]CR[mc] ;W[oc]CR[oc] ;B[pr]CR[pr] ;W[qq]CR[qq] ;B[kp]CR[kp] ;W[eo]CR[eo] ;B[gf]CR[gf] ;W[fq]CR[fq] ;B[fr]CR[fr] ;W[er]CR[er] ;B[dr]CR[dr] ;W[ep]CR[ep] ;B[dq]CR[dq] ;W[gr]CR[gr] ;B[es]CR[es] ;W[hp]CR[hp] ;B[nb]CR[nb]PL[W] (;W[lq]LB[ob:A][jd:B]CR[lq]C[Not so severe: it's more urgent for white to defend at A (P18) or to invade black's moyo at B (K16).] ;B[lp]CR[lp] ;W[mq]CR[mq] ;B[mp]CR[mp] ;W[nr]CR[nr] ;B[or]CR[or] ;W[oq]CR[oq] ;B[np]CR[np] ;W[mr]CR[mr] ;B[qr]CR[qr] ;W[jq]CR[jq] (;B[pq]LB[rq:A]CR[pq]C[Bad style: correct is to hane at A (S3).] ;W[op]CR[op] ;B[qp]CR[qp] ;W[on]CR[on] ;B[rq]CR[rq]C[There was no reason for black to spend one move here: he was safe anyway.] ;W[lm]CR[lm] ;B[pb]CR[pb] ;W[ob]CR[ob] ;B[oa]CR[oa] ;W[qb]CR[qb] ;B[qa]CR[qa] ;W[rb]CR[rb] ;B[me]CR[me] ;W[jf]CR[jf] ;B[ig]CR[ig] ;W[ld]CR[ld] ;B[md]CR[md] (;W[jd]LB[lf:A]CR[jd]C[Bad direction: white should rather get out with A (M14).] ;B[lg]CR[lg] ;W[jg]CR[jg] ;B[jh]CR[jh] ;W[gc]CR[gc] ;B[fd]CR[fd] ;W[ih]CR[ih] ;B[hg]CR[hg] ;W[kh]CR[kh] ;B[ji]CR[ji] ;W[kg]CR[kg] ;B[kj]CR[kj] ;W[jl]CR[jl] ;B[lf]CR[lf] ;W[lc]CR[lc] ;B[je]CR[je] ;W[ke]CR[ke] ;B[ie]CR[ie] ;W[kf]CR[kf] ;B[hc]CR[hc] ;W[ic]CR[ic] ;B[hb]CR[hb] ;W[lh]CR[lh] ;B[mh]CR[mh] ;W[lj]CR[lj] ;B[lk]CR[lk] ;W[mi]CR[mi] ;B[km]CR[km] ;W[kl]CR[kl] ;B[mm]CR[mm] ;W[ll]CR[ll] ;B[nn]CR[nn] ;W[om]CR[om] ;B[ml]CR[ml] ;W[nk]CR[nk] ;B[mk]CR[mk] ;W[nj]CR[nj] ;B[kk]CR[kk] ;W[nh]CR[nh] ;B[og]CR[og] (;W[ph]LB[nf:B][pf:A]CR[ph]C[Bad direction: white should peep at A (Q14) and if black connects, cut at B (O14). The game commentary ends here.] ;B[pg]CR[pg] ;W[nf]CR[nf] ;B[oe]CR[oe] ;W[mf]CR[mf] ;B[od]CR[od] ;W[pc]CR[pc] ;B[pe]CR[pe] ;W[rf]CR[rf] ;B[rg]CR[rg] ;W[hh]CR[hh] ;B[gh]CR[gh] ;W[hi]CR[hi] ;B[gj]CR[gj] ;W[hj]CR[hj] ;B[hk]CR[hk] ;W[gi]CR[gi] ;B[ij]CR[ij] ;W[gk]CR[gk] ;B[il]CR[il] ;W[jn]CR[jn] ;B[im]CR[im] ;W[fj]CR[fj] ;B[jm]CR[jm] ;W[pi]CR[pi] ;B[pk]CR[pk] ;W[rk]CR[rk] ;B[rj]CR[rj] ;W[ql]CR[ql] ;B[pl]CR[pl] ;W[ol]CR[ol] ;B[rd]CR[rd] ;W[re]CR[re] ;B[qd]CR[qd] ;W[rc]CR[rc] ;B[sd]CR[sd] ;W[sc]CR[sc] ;B[sg]CR[sg] ;W[qc]CR[qc] ;B[lb]CR[lb] ;W[of]CR[of] ;B[pf]CR[pf] ;W[ne]CR[ne] ;B[nd]CR[nd] ;W[le]CR[le] ;B[bo]CR[bo] ;W[kb]CR[kb] ;B[la]CR[la] ;W[bn]CR[bn] ;B[bf]CR[bf] ;W[bg]CR[bg] ;B[be]CR[be] ;W[ch]CR[ch] ;B[gl]CR[gl] ;W[fl]CR[fl] ;B[gm]CR[gm] ;W[ib]CR[ib] ;B[na]CR[na] ;W[pa]CR[pa]C[Subsequent moves not recorded.]) (;W[pf]CR[pf]C[Good direction.] ;B[pg]CR[pg] ;W[nf]CR[nf])) (;W[lf]CR[lf]C[Good direction of play.])) (;B[rq]CR[rq]C[Good style.])) (;W[ob]CR[ob]C[Big defensive point.]) (;W[jd]CR[jd]C[Invasion.]))

La siguiente partida es entre Sorin Gherman vs Yoneyama:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Yoneyama]DT[1995-06-24]EV[insei league, B class]PC[Igo Kenshu Center]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+Resign] ;B[cp]CR[cp] ;W[pd]CR[pd] ;B[dc]CR[dc] ;W[pp]CR[pp] ;B[eq]CR[eq] ;W[de]CR[de] ;B[cg]CR[cg] ;W[cc]CR[cc] ;B[cd]CR[cd] ;W[dd]CR[dd] ;B[ce]CR[ce] ;W[cf]CR[cf] ;B[df]CR[df] ;W[bf]CR[bf] ;B[bc]CR[bc] ;W[cb]CR[cb] ;B[be]CR[be] ;W[bg]CR[bg] ;B[ec]CR[ec] ;W[ae]CR[ae] ;B[bd]CR[bd] ;W[fd]CR[fd] ;B[bb]CR[bb] ;W[ch]CR[ch] ;B[dg]CR[dg] ;W[dh]CR[dh] ;B[fg]CR[fg] ;W[ed]CR[ed] ;B[eh]CR[eh] ;W[fc]CR[fc] ;B[db]CR[db] ;W[eb]CR[eb] ;B[ca]CR[ca] ;W[dj]CR[dj] ;B[ei]CR[ei] ;W[cl]CR[cl] ;B[jd]CR[jd] ;W[ie]CR[ie] (;B[je]LB[ih:A]CR[je]C[Wrong direction of play: shold be at A (J12).] ;W[if]CR[if] ;B[id]CR[id] ;W[hd]CR[hd] ;B[hc]CR[hc] (;W[ff]LB[ge:A]CR[ff]C[Should be at A (G15).] ;B[gg]CR[gg] ;W[jf]CR[jf] ;B[he]CR[he] ;W[hf]CR[hf] ;B[gd]CR[gd] ;W[gf]CR[gf] ;B[kf]CR[kf] ;W[kg]CR[kg] ;B[lf]CR[lf] (;W[ii]LB[jh:A]CR[ii]C[Should be kaketsugi at A (K12).] ;B[fk]CR[fk] ;W[ik]CR[ik] ;B[fm]CR[fm] (;W[jp]LB[lg:A]CR[jp]C[Should push at A (M13).] ;B[lg]CR[lg] (;W[kh]LB[qf:A]CR[kh]C[Should ignore black's move and defend at A (R14).] ;B[qf]CR[qf]C[Very severe.] (;W[pj]LB[nc:A]CR[pj]C[Should defend at A (O17).] (;B[ph]LB[of:A]CR[ph]C[At A (P14) is more severe.] ;W[qe]CR[qe] ;B[pf]CR[pf] ;W[oc]CR[oc] ;B[mc]CR[mc] (;W[qn]LB[re:A]CR[qn]C[White should defend at A (S15) and he's ahead (black's many stones int the upper right are not bringing much profit).] ;B[qc]CR[qc] ;W[rd]CR[rd] ;B[rc]CR[rc] ;W[rf]CR[rf] ;B[ob]CR[ob] (;W[nb]LB[pb:B][rh:A]CR[nb]C[Should jump at A (S12) threatening B (Q18) next. See the variation diagram. The game commentary ends here.] ;B[pb]CR[pb] ;W[nc]CR[nc] ;B[sd]CR[sd] ;W[re]CR[re] ;B[rg]CR[rg] ;W[md]CR[md] ;B[lc]CR[lc]C[Subsequent moves not recorded. White won by resign.]) (;W[rh]CR[rh] ;B[nc]CR[nc] ;W[pi]CR[pi]C[White escapes this way.])) (;W[re]CR[re]C[Defend. Black is so strong in the surroundings, that invading san-san will almost sure bring damage to white's corner.])) (;B[of]CR[of]C[More severe.])) (;W[nc]CR[nc]C[Defend.])) (;W[qf]CR[qf]C[Defend. A black move here would be very tough on white.])) (;W[lg]CR[lg]C[Build strength.])) (;W[jh]CR[jh]C[Proper move.])) (;W[ge]CR[ge]C[Shape move.])) (;B[ih]CR[ih]C[Good direction of play: black needs to protect his stones in the center first.]))

La siguiente partida es entre Sorin Gherman vs Cho:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Cho]DT[1995-02-26]EV[insei league, C class]PC[Igo Kenshu Center]C[My opponent is Cho Chikun's daughter. Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[W+15.50] ;B[dp]CR[dp] ;W[pd]CR[pd] ;B[dd]CR[dd] ;W[pp]CR[pp] ;B[dj]CR[dj] ;W[fq]CR[fq] ;B[dn]CR[dn] ;W[ip]CR[ip] ;B[jd]CR[jd] ;W[lc]CR[lc] ;B[qn]CR[qn] ;W[pn]CR[pn] ;B[pm]CR[pm] ;W[qo]CR[qo] ;B[on]CR[on] ;W[po]CR[po] ;B[om]CR[om] ;W[np]CR[np] ;B[pi]CR[pi] ;W[hd]CR[hd] ;B[ke]CR[ke] ;W[hf]CR[hf] ;B[df]CR[df] ;W[hh]CR[hh] ;B[kg]CR[kg] (;W[qm]LB[hj:A]CR[qm]C[Small: the big strategical point is the ikken-tobi at A (H10).] ;B[ql]CR[ql] ;W[rn]CR[rn] ;B[hj]CR[hj] ;W[jh]CR[jh] ;B[kh]CR[kh] ;W[ij]CR[ij] ;B[hk]CR[hk] ;W[jj]CR[jj] ;B[lj]CR[lj]C[Bad direction of play: it helps white connect his stones, without making much profit. (No better move was suggested instead). The game commentary ends here.] ;W[jl]CR[jl] ;B[hn]CR[hn] ;W[jn]CR[jn] ;B[qf]CR[qf] ;W[pf]CR[pf] ;B[pe]CR[pe] ;W[qe]CR[qe] ;B[oe]CR[oe] ;W[qd]CR[qd] ;B[of]CR[of] ;W[nc]CR[nc] ;B[ec]CR[ec] ;W[ch]CR[ch] ;B[bf]CR[bf] ;W[cj]CR[cj] ;B[ck]CR[ck] ;W[bk]CR[bk] ;B[bj]CR[bj] ;W[ci]CR[ci] ;B[bl]CR[bl] ;W[dk]CR[dk] ;B[cl]CR[cl] ;W[ej]CR[ej] ;B[gg]CR[gg] ;W[hg]CR[hg] ;B[fi]CR[fi] ;W[ei]CR[ei] ;B[fh]CR[fh] ;W[fj]CR[fj] ;B[gi]CR[gi] ;W[el]CR[el] ;B[fk]CR[fk] ;W[fl]CR[fl] ;B[gl]CR[gl] ;W[cf]CR[cf] ;B[ce]CR[ce] ;W[bi]CR[bi] ;B[ak]CR[ak] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[ah]CR[ah] ;B[af]CR[af] ;W[dg]CR[dg] ;B[cf]CR[cf] ;W[ag]CR[ag] ;B[ai]CR[ai] ;W[eo]CR[eo] ;B[en]CR[en] ;W[aj]CR[aj] ;B[hp]CR[hp] ;W[hq]CR[hq] ;B[ai]CR[ai] ;W[fn]CR[fn] ;B[fm]CR[fm] ;W[aj]CR[aj] ;B[io]CR[io] ;W[jo]CR[jo] ;B[ai]CR[ai] ;W[gm]CR[gm] ;B[em]CR[em] ;W[aj]CR[aj] ;B[iq]CR[iq] ;W[jp]CR[jp] ;B[ai]CR[ai] ;W[gj]CR[gj] ;B[gk]CR[gk] ;W[aj]CR[aj] ;B[gq]CR[gq] ;W[hr]CR[hr] ;B[ai]CR[ai] ;W[eg]CR[eg] ;B[hi]CR[hi] ;W[aj]CR[aj] ;B[bk]CR[bk] ;W[ek]CR[ek] ;B[eh]CR[eh] ;W[ai]CR[ai] ;B[dh]CR[dh] ;W[di]CR[di] ;B[ih]CR[ih] ;W[jc]CR[jc] ;B[ic]CR[ic] ;W[id]CR[id] ;B[kc]CR[kc] ;W[jb]CR[jb] ;B[kb]CR[kb] ;W[je]CR[je] ;B[kd]CR[kd] ;W[ii]CR[ii] ;B[fo]CR[fo] ;W[cm]CR[cm] ;B[cn]CR[cn] ;W[gp]CR[gp] ;B[dl]CR[dl] ;W[rf]CR[rf] ;B[pg]CR[pg] ;W[cq]CR[cq] ;B[dq]CR[dq] ;W[dr]CR[dr] ;B[cp]CR[cp] ;W[cr]CR[cr] ;B[hb]CR[hb] ;W[gc]CR[gc] ;B[gb]CR[gb] ;W[rl]CR[rl] ;B[km]CR[km] ;W[kl]CR[kl] ;B[jm]CR[jm] ;W[im]CR[im] ;B[lm]CR[lm] ;W[hm]CR[hm] ;B[go]CR[go] ;W[fp]CR[fp] ;B[il]CR[il] ;W[ik]CR[ik] ;B[gn]CR[gn] ;W[hl]CR[hl] ;B[in]CR[in] ;W[il]CR[il] ;B[ff]CR[ff] ;W[ho]CR[ho] ;B[fn]CR[fn] ;W[ll]CR[ll] ;B[jg]CR[jg] ;W[ig]CR[ig] ;B[mm]CR[mm] ;W[kj]CR[kj] ;B[ki]CR[ki] ;W[jf]CR[jf] ;B[rg]CR[rg] ;W[qk]CR[qk] ;B[pb]CR[pb] ;W[qb]CR[qb] ;B[nb]CR[nb] ;W[mb]CR[mb] ;B[oc]CR[oc] ;W[od]CR[od] ;B[nd]CR[nd] ;W[mc]CR[mc] ;B[oa]CR[oa] ;W[qa]CR[qa]C[Subsequent moves omitted. White won by 15.5 points.]) (;W[hj]CR[hj]C[Strategical point: makes white strong, reducing black's influence in the center.]))

La siguiente partida es entre Sorin Gherman contra un insei japonés:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Japanese insei]DT[1994-03-20]EV[insei league, C class]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro).]RE[W+11.50] ;B[dp]CR[dp] ;W[pd]CR[pd] ;B[dc]CR[dc] ;W[pp]CR[pp] ;B[jd]CR[jd] ;W[cf]CR[cf] ;B[ch]CR[ch] ;W[cc]CR[cc] ;B[cd]CR[cd] ;W[dd]CR[dd] ;B[bc]CR[bc] ;W[cb]CR[cb] ;B[db]CR[db] ;W[bd]CR[bd] ;B[ce]CR[ce] ;W[be]CR[be] ;B[de]CR[de] (;W[df]LB[bb:A][ed:B]CR[df]C[Bad: white should capture the black stone in the corner directly, with A (B18). That would leave the possibility to get out at B (E16) later.] (;B[ed]LB[ee:A]CR[ed]C[Bad: black should extend at A (E15).] ;W[ee]CR[ee] ;B[dd]CR[dd] ;W[bb]CR[bb] ;B[ef]CR[ef] ;W[fe]CR[fe] ;B[fd]CR[fd] ;W[ge]CR[ge] ;B[eg]CR[eg] ;W[gd]CR[gd] ;B[gc]CR[gc] ;W[hc]CR[hc] ;B[gb]CR[gb] ;W[id]CR[id] ;B[hb]CR[hb] ;W[jc]CR[jc] ;B[ib]CR[ib] (;W[ic]LB[je:A]CR[ic]C[White should play kikashi at A (K15) before connecting.] ;B[kc]CR[kc] (;W[jb]LB[je:A]CR[jb]C[Again, should first play kikashi at A (K15).] ;B[kd]CR[kd] (;W[hg]LB[if:A]CR[hg]C[The correct shape is at A (J14).] ;B[ca]CR[ca] ;W[ba]CR[ba]C[White should have played tenuki (= ignore the opponent's move) instead.] ;B[bf]CR[bf] ;W[bg]CR[bg] ;B[af]CR[af] ;W[cg]CR[cg] ;B[ac]CR[ac] ;W[ag]CR[ag] ;B[da]CR[da] ;W[ae]CR[ae] ;B[ab]CR[ab] ;W[dh]CR[dh] ;B[ie]CR[ie] (;W[eh]LB[if:A]CR[eh]C[White should play at A (J14) instead.] ;B[ig]CR[ig] (;W[hh]LB[hf:A]CR[hh]C[Should be at A (H14).] ;B[gf]CR[gf] ;W[ff]CR[ff] ;B[fg]CR[fg] ;W[gg]CR[gg] ;B[hf]CR[hf] ;W[hd]CR[hd] ;B[kb]CR[kb] ;W[ja]CR[ja] ;B[qf]CR[qf] (;W[qc]LB[oe:A]CR[qc]C[Should be more active, at A (P15).] ;B[ih]CR[ih] ;W[hi]CR[hi] ;B[oc]CR[oc] ;W[od]CR[od] ;B[ka]CR[ka] ;W[fh]CR[fh] ;B[pb]CR[pb] (;W[qb]LB[nc:A][pg:B]CR[qb]C[White should press black with A (O17) before attacking at B (Q13). See the variation diagram.] ;B[rd]CR[rd] (;W[nd]LB[pg:A]CR[nd]C[Should be at A (Q13).] ;B[nc]CR[nc] ;W[rc]CR[rc] ;B[qe]CR[qe] ;W[mc]CR[mc] ;B[mb]CR[mb] ;W[og]CR[og] ;B[qi]CR[qi] ;W[mg]CR[mg] ;B[jq]CR[jq] ;W[cn]CR[cn] ;B[fp]CR[fp] (;W[em]LB[en:A]CR[em]C[Too restrained: white has no reason to be shy here, should go all the way with A (E6).]PL[W] ;B[qn]CR[qn] ;W[nq]CR[nq] ;B[bo]CR[bo] ;W[bn]CR[bn] ;B[co]CR[co] (;W[gm]LB[qk:A]CR[gm]C[Too slow: white should invade black's right side (at A - R9).] ;B[an]CR[an] ;W[bm]CR[bm] ;B[am]CR[am] ;W[al]CR[al] ;B[ao]CR[ao] ;W[dn]CR[dn] ;B[rp]CR[rp] ;W[qq]CR[qq]C[The rest of the game is not recorded. White won by 11.5 points.]) (;W[qk]CR[qk]C[It's time to invade.])) (;W[en]CR[en]C[Normal, given the white thickness above.])) (;W[pg]CR[pg]C[Severe pressing move.])) (;W[nc]CR[nc] ;B[nb]CR[nb] ;W[pc]CR[pc] ;B[ob]CR[ob] ;W[pg]CR[pg]C[Severe: white is defending very actively.] ;B[pf]CR[pf] ;W[of]CR[of] ;B[og]CR[og] ;W[qg]CR[qg] ;B[oe]CR[oe] ;W[nf]CR[nf] ;B[pe]CR[pe] ;W[ne]CR[ne])) (;W[oe]CR[oe]C[More active.])) (;W[hf]CR[hf]C[Defend.])) (;W[if]CR[if]C[Shape move.])) (;W[if]CR[if]C[Correct shape.])) (;W[je]CR[je]C[Kikashi before defending.])) (;W[je]CR[je]C[Kikashi before defending.])) (;B[ee]CR[ee]C[Correct.])) (;W[bb]CR[bb]C[Should be directly here.]))

La siguiente partida es entre Sorin Gherman vs Yun:

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[5.50]TM[] PW[Sorin Gherman]PB[Yun]DT[1995-07-08]EV[insei league, B class]PC[Igo Kenshu Center, Chiba, Japan]C[Game commentary by Hans Pietsch ( http://gobase.org/information/players/?pp=Hans%20Pietsch ), A class insei at that time, later promoted until 4 dan pro). ]RE[B+3.50] ;B[dp]CR[dp] ;W[pd]CR[pd] ;B[dc]CR[dc] ;W[pp]CR[pp] ;B[nq]CR[nq] ;W[pn]CR[pn] ;B[kp]CR[kp] ;W[de]CR[de] ;B[ce]CR[ce] ;W[cf]CR[cf] ;B[cd]CR[cd] ;W[dg]CR[dg] ;B[fc]CR[fc] ;W[ck]CR[ck] ;B[cm]CR[cm] ;W[ek]CR[ek] ;B[ql]CR[ql] ;W[qi]CR[qi] ;B[qo]CR[qo] ;W[po]CR[po] ;B[qn]CR[qn] ;W[pm]CR[pm] ;B[qp]CR[qp] ;W[qm]CR[qm] ;B[rm]CR[rm] ;W[qq]CR[qq] ;B[rk]CR[rk] ;W[rp]CR[rp] ;B[ro]CR[ro] ;W[so]CR[so] ;B[rn]CR[rn] ;W[rr]CR[rr] ;B[pl]CR[pl] ;W[iq]CR[iq] ;B[fq]CR[fq] ;W[kr]CR[kr] ;B[ip]CR[ip] ;W[hq]CR[hq] ;B[lq]CR[lq] ;W[hp]CR[hp] ;B[io]CR[io] ;W[ho]CR[ho] ;B[hn]CR[hn] ;W[gn]CR[gn] ;B[bk]CR[bk]C[Very bad move: black indended it to be a kikashi, but it isn't.] ;W[in]CR[in] ;B[hm]CR[hm] ;W[jn]CR[jn] ;B[ko]CR[ko] (;W[gm]LB[lm:A]CR[gm]C[Should play at A (M7) to seal black in.] ;B[hl]CR[hl] ;W[gl]CR[gl] ;B[hk]CR[hk] ;W[jl]CR[jl] ;B[mm]CR[mm] ;W[ij]CR[ij] ;B[fk]CR[fk] ;W[hj]CR[hj] ;B[gk]CR[gk] ;W[el]CR[el] ;B[fi]CR[fi] ;W[gh]CR[gh] ;B[gi]CR[gi] ;W[hh]CR[hh] ;B[jk]CR[jk] ;W[ik]CR[ik] ;B[jm]CR[jm] ;W[km]CR[km] ;B[kl]CR[kl] ;W[im]CR[im] ;B[il]CR[il] ;W[ll]CR[ll] ;B[jm]CR[jm] ;W[lm]CR[lm] ;B[pq]CR[pq] ;W[jl]CR[jl] ;B[pr]CR[pr] ;W[kk]CR[kk] ;B[cj]CR[cj] ;W[dj]CR[dj] ;B[cl]CR[cl] ;W[ci]CR[ci] ;B[dk]CR[dk] ;W[ei]CR[ei] ;B[mn]CR[mn] ;W[nl]CR[nl] ;B[nm]CR[nm] ;W[ol]CR[ol] ;B[om]CR[om] ;W[oj]CR[oj]C[Small: the upper side is very big now, white should play there instead.] ;B[ld]CR[ld] ;W[nc]CR[nc] ;B[mc]CR[mc] ;W[nd]CR[nd] ;B[id]CR[id] (;W[kc]LB[le:A]CR[kc]C[At A (M15) is bigger than the invasion.] ;B[kd]CR[kd] ;W[mb]CR[mb] ;B[jc]CR[jc] ;W[ed]CR[ed] ;B[ec]CR[ec] ;W[dr]CR[dr] ;B[dq]CR[dq] ;W[er]CR[er] ;B[cr]CR[cr] ;W[br]CR[br] ;B[cq]CR[cq] ;W[fr]CR[fr] ;B[ri]CR[ri] ;W[rh]CR[rh] ;B[qh]CR[qh] ;W[rg]CR[rg] ;B[lb]CR[lb] ;W[cs]CR[cs] ;B[bi]CR[bi] ;W[qj]CR[qj] ;B[nb]CR[nb] ;W[ob]CR[ob] ;B[ma]CR[ma] ;W[mf]CR[mf] ;B[me]CR[me] ;W[ne]CR[ne] ;B[lf]CR[lf] ;W[lg]CR[lg] ;B[mg]CR[mg] ;W[nf]CR[nf] ;B[kg]CR[kg] ;W[lh]CR[lh] ;B[oa]CR[oa] ;W[pb]CR[pb] ;B[ch]CR[ch] ;W[di]CR[di] ;B[bf]CR[bf] ;W[bq]CR[bq] ;B[bp]CR[bp] ;W[cg]CR[cg] ;B[bs]CR[bs] ;W[as]CR[as] ;B[ds]CR[ds] ;W[es]CR[es] ;B[aq]CR[aq] ;W[rj]CR[rj] ;B[qr]CR[qr] ;W[kh]CR[kh] ;B[jg]CR[jg] ;W[kf]CR[kf] ;B[jf]CR[jf] ;W[bg]CR[bg] ;B[be]CR[be] ;W[eq]CR[eq] ;B[ep]CR[ep] ;W[fp]CR[fp] ;B[fo]CR[fo] ;W[gp]CR[gp] ;B[ih]CR[ih] ;W[ii]CR[ii] ;B[fe]CR[fe] ;W[ef]CR[ef] ;B[em]CR[em] ;W[fm]CR[fm] ;B[en]CR[en] ;W[fd]CR[fd] ;B[gd]CR[gd] ;W[ge]CR[ge] ;B[gf]CR[gf] ;W[he]CR[he] ;B[ff]CR[ff] ;W[hd]CR[hd] ;B[hg]CR[hg] ;W[gg]CR[gg] ;B[hf]CR[hf] ;W[fg]CR[fg] ;B[ee]CR[ee]C[Subsequent moves omited: black won by 3.5 points.]) (;W[le]CR[le]C[Bigger than invading black's upper side. The game commentary ends here.])) (;W[lm]CR[lm]C[Natural move: connect own stones and seal the opponent in.]))

Anotar una partida de go: el kifu

Anotar una partida de Go es algo sencillo: sólo se necesita de un kifu y dos colores. Anotas en las coordenadas que se jugó con un color u otro en función del jugador que movió el número de jugada, si fue la 5ª jugada se pone un 5 en dicha posición. Tal vez lo más difícil esté cuando hay un ko o se realiza una jugada en alguna posición que anteriormente estaba ocupada por un grupo que se capturó (eso obliga a anotar en un margen del kifu "jugada 43 en 5", es decir, se señala que la jugada 43 se ha hecho donde se jugó 5 o si tiene las coordenadas como el de la imagen, se señala la coordenada). Según mejoras en esta técnica de anotar una partida necesitas menos plantillas y te entiendes mejor, pero es frecuente cuando se comienza y aprende a anotar que en un kifu apuntemos 50 ó 100 jugadas y recurramos a otro para las siguientes 50-100 y así hasta acabar la partida, para que sea menos complejo leerlo (un kifu con más de 200 jugadas es legible, pero marea o confunde un poco seguirlo cuando se es novato).

Partida anotada en un kifu entre
Cho U y Takao Shinji, imagen sacada de Sensei's Library

El kifu es una herramienta sencilla y fácil de manejar. Muchas personas lo desconocerán por culpa de las app que te permiten anotar una partida de forma que luego puedes reproducir como una secuencia, como quien revisa movimientos en una partida online. Hay quien se limita a jugar y jugar y cosas tan extrañas como estas es una pérdida de tiempo, yo ahora mismo con el kifu de la partida de Kitani Minoru y Go Seigen puedo tardar unos 15 minutos en reproducirla entera en un tablero (es más o menos lo que me cuestan las partidas del libro European Go Yearbook).