Problem 15088 goproblems.com


Author	Ceram88	Created	2011-08-15
Difficulty	9 dan (history)	Source	KGS Game Ceram vs. Sunders
AVG solve time	44 sec	Stars	4 (2 votes)
User attempts	28 / 181	Collections	Instruction Required, Corner based
Genre	best move	Your attempts	N/A
Similar problems
Created	2011-08-15
Source	KGS Game Ceram vs. Sunders
Stars	4 (2 votes)
Collections	Instruction Required, Corner based
Your attempts	N/A

(;AB[bo]AW[ap]AW[ao]AW[bp]AW[cp]AW[dp]AW[cq]AW[eo]AW[fo]AW[fn]AW[fm]AW[go]AW[fp]AW[fq]AW[hp]AW[ip]AB[jo]AB[io]AB[ho]AB[hn]AB[gn]AB[gm]AB[fl]AB[em]AB[en]AB[do]AB[co]AB[an]AB[bn]AB[dn]AB[ep]AB[eq]AB[dq]LB[ep:1]LB[fp:2]LB[eq:3]LB[fq:4]LB[dq:5]LB[cq:6]C[White, rushed by 5 second sudden death byo-yomi, plays the following exchange. Can black pull something off or should he tenuki (T)?]LB[jl:T]AW[js]AW[jr]AW[kq]AW[kp]AW[jp]AW[lr]AW[ls]AB[lq]AB[lp]AB[lo]AB[ko]AP[goproblems] (;B[cr];W[br] (;B[aq];W[bq];B[bs];W[ar]LB[jl:T]C[T to tenuki.] (;B[er] (;W[ds]C[T to tenuki.]LB[jl:T] (;B[cs] (;W[es]LB[jl:T]C[T to tenuki.] (;B[fr] (;W[gr]C[CHOICE] (;B[fs];W[gs]C[T to tenuki.]LB[jl:T] (;B[dr];W[ds]C[Huge seki. White can play differently (Instead of wD1, wF2) to slightly minimize the damage and keep sente, but a large seki is inevitable. RIGHT]) (;B[jl];W[dr]C[Woops])) (;B[gs]LB[jl:T]C[RIGHT];W[hr]LB[jl:T] (;B[fs];W[hs];B[dr];W[es]C[RIGHT]) (;B[hs];W[is];B[dr]C[];W[kl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[jl]C[];W[hs];B[dr]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT])) (;B[gq];W[gp];B[gs];W[hr]LB[jl:T]C[Tenuki at T.] (;B[fs];W[hs];B[dr];W[ds]C[RIGHT]) (;B[hs];W[is];B[dr]C[];W[jl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[jl];W[hs] (;B[dr];W[kl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[fs];W[dr]))) (;B[dr];W[gs];B[fs];W[es]C[RIGHT])) (;W[fs]C[White should not play this, but if he does...];B[gs];W[gr];B[dr];W[fs];B[es];W[hr];B[as]C[RIGHT])) (;B[fs];W[fr];B[dr];W[es];B[ds] (;W[gs]) (;W[gr])) (;B[jl];W[fr]C[Why would you even do that? You were so close!])) (;W[fr];B[es];W[fs];B[dr]C[RIGHT])) (;B[fr];W[cs] (;B[es];W[as];B[dr];W[gr];B[bs];W[cs]) (;B[dr];W[gr] (;B[es];W[cs]) (;B[fs];W[gs];B[es];W[cs])) (;B[gr];W[dr])) (;B[es];W[cs];B[dr];W[cs];B[fr];W[gr]) (;B[dr];W[cs] (;B[fr];W[gr] (;B[es];W[cs]) (;B[fs];W[gs];B[es];W[cs])) (;B[es];W[cs];B[fr];W[gr])) (;B[jl];W[cs];B[es];W[fr];B[dr];W[cs])) (;W[fr]C[T to tenuki.]LB[jl:T] (;B[ds];W[fs];B[es]C[RIGHT]) (;B[es] (;W[ds];B[cs];W[fs];B[dr]C[RIGHT]) (;W[fs]C[T to tenuki.]LB[jl:T] (;B[cs];W[dr]LB[jl:T]C[T to tenuki.] (;B[ds]C[Huge sekiRIGHT]) (;B[jl];W[ds])) (;B[ds]C[RIGHT]) (;B[jl];W[ds])) (;W[cs];B[ds];W[fs];B[cs]C[RIGHT])) (;B[cs];W[es];B[dr]) (;B[fs];W[gs] (;B[es];W[ds]) (;B[ds];W[es]C[Black gives white a ko. F1 was overplay.])) (;B[jl];W[es]))) (;B[cs];W[er];B[dr];W[fr]) (;B[ds];W[er];B[dr];W[es]) (;B[dr];W[fr] (;B[cs];W[er]) (;B[es];W[fs];B[er];W[cs])) (;B[es];W[dr]) (;B[fr];W[dr] (;B[er];W[cs];B[gq];W[gp]C[Black has nothing.]) (;B[cs];W[er])) (;B[jl];W[er]C[You could have had something.])) (;B[ds];W[er]C[This is what was played in the game, much to white's (my) satisfaction :P]) (;B[dr];W[ar] (;B[fr];W[bs]C[Not enough room to make two eyes :(]) (;B[bs];W[fr] (;B[bq];W[aq]) (;B[aq];W[bq] (;B[cs];W[er]) (;B[es];W[fs];B[er];W[cs])) (;B[cs];W[er] (;B[bq];W[aq]) (;B[aq];W[bq])) (;B[es];W[er]))) (;B[er] (;W[fr];B[aq];W[bq];B[bs];W[ar] (;B[ds];W[fs];B[es]C[RIGHT]) (;B[es] (;W[ds];B[cs]) (;W[fs]C[T to tenuki.]LB[jl:T] (;B[cs];W[dr]LB[jl:T]C[T to tenuki.] (;B[ds]C[Huge sekiRIGHT]) (;B[jl];W[ds])) (;B[ds]C[RIGHT]) (;B[jl];W[ds])) (;W[cs];B[ds];W[fs];B[cs]C[RIGHT])) (;B[cs];W[es];B[dr]) (;B[fs];W[gs] (;B[es];W[ds]) (;B[ds];W[es]C[Black gives white a ko. F1 was overplay.])) (;B[jl];W[es])) (;W[cs];B[ds];W[dr]C[White can opt for a ko. RIGHT]) (;W[ds];B[aq];W[bq];B[bs];W[ar] (;B[cs] (;W[es]LB[jl:T]C[T to tenuki.] (;B[fr] (;W[gr]C[CHOICE] (;B[fs];W[gs]C[T to tenuki.]LB[jl:T] (;B[dr];W[ds]C[Huge seki. White can play differently (Instead of wD1, wF2) to slightly minimize the damage and keep sente, but a large seki is inevitable. RIGHT]) (;B[jl];W[dr]C[Woops])) (;B[gs]LB[jl:T]C[RIGHT];W[hr]LB[jl:T] (;B[fs];W[hs];B[dr];W[es]C[RIGHT]) (;B[hs];W[is];B[dr]C[];W[kl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[jl]C[];W[hs];B[dr]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT])) (;B[gq];W[gp];B[gs];W[hr]LB[jl:T]C[Tenuki at T.] (;B[fs];W[hs];B[dr];W[ds]C[RIGHT]) (;B[hs];W[is];B[dr]C[];W[jl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[jl];W[hs] (;B[dr];W[kl]C[White now plays elsewhere. Taking at F1 would cost him the seki.RIGHT]) (;B[fs];W[dr]))) (;B[dr];W[gs];B[fs];W[es]C[RIGHT])) (;W[fs]C[White should not play this, but if he does...];B[gs];W[gr];B[dr];W[fs];B[es];W[hr];B[as]C[RIGHT])) (;B[fs];W[fr];B[dr];W[es];B[ds] (;W[gs]) (;W[gr])) (;B[jl];W[fr]C[Why would you even do that? You were so close!])) (;W[fr];B[es];W[fs];B[dr]C[RIGHT])) (;B[fr];W[cs] (;B[es];W[as];B[dr];W[gr];B[bs];W[cs]) (;B[dr];W[gr] (;B[es];W[cs]) (;B[fs];W[gs];B[es];W[cs])) (;B[gr];W[dr])) (;B[es];W[cs];B[dr];W[cs]) (;B[dr];W[cs] (;B[fr]) (;B[es];W[cs];B[fr];W[gr])) (;B[jl];W[cs];B[es];W[fr];B[dr];W[cs])))) (;B[dr];W[cr];B[fr];W[ds];B[er];W[gr]C[Black has nothing here.]) (;B[jl]C[No, black could have done something!]) (;B[er];W[cr]C[White can now easily defend the invasion.]) (;B[fr];W[dr];B[er];W[cr];B[gq];W[gp]C[Black has no room to make eyes and is trapped between two living white groups.]))