Problem 10545 goproblems.com


Author	juste	Created	2007-10-26
Difficulty	8 kyu (history)	Source	KGS game
AVG solve time	72 sec	Stars	4.57 (14 votes)
User attempts	1210 / 3714	Collections	Amateur Game
Genre	life and death	Your attempts	N/A
Similar problems
Created	2007-10-26
Source	KGS game
Stars	4.57 (14 votes)
Collections	Amateur Game
Your attempts	N/A

(;AW[qr]AW[qq]AW[pp]AW[qo]AW[oo]AW[no]AW[mp]AW[lp]AW[lq]AW[kq]AW[kr]AW[js]AW[is]AW[hs]AB[gs]AB[hr]AB[gq]AB[jr]AB[jq]AB[jp]AB[jo]AB[lr]AB[mr]AB[mq]AB[nq]AB[np]AB[op]AB[pq]AB[pr]C[White to Kill.]AP[goproblems] (;W[or];B[os] (;W[ns] (;B[ps] (;W[nr] (;B[oq]C[Woho! Did Black make a mistake here? If you think Black is still dead after this move play tenuki at T (N5)...]LB[mo:T] (;W[ks];B[ms];W[nr]C[Well doneRIGHT]) (;W[ms];B[ls]TR[nr]TR[ns]C[black lives, miai for life at marks]) (;W[ls];B[ms];W[nr];B[ks]C[Ko for life, good for black, you can do better]) (;W[qs];B[ms] (;W[ls];B[nr]) (;W[ks];B[nr]) (;W[nr];B[ks])) (;W[mo];B[ks] (;W[ls];B[ms] (;W[nr];B[ks]C[Black plays a 'thank you' ko...]) (;W[ks];B[nr])) (;W[ms];B[ls]))) (;B[ms];W[ks]C[One eye.RIGHT]TR[ns]TR[nr]TR[or])) (;W[ks];B[nr] (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[qs];B[oq] (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]))) (;W[ls];B[nr] (;W[ms];B[ks] (;W[ls];B[ms]C[black lives, go proverb: capture three and live]) (;W[ms];B[ls]C[black lives, go proverb: capture three and live]) (;W[ns];B[ms]C[black lives, go proverb: capture three and live])) (;W[ks];B[ms]C[black lives]) (;W[qs];B[oq] (;W[ks];B[ms]C[black lives]) (;W[ms];B[ks] (;W[ls];B[ms]C[black lives, go proverb: capture three and live]) (;W[ms];B[ls]C[black lives, go proverb: capture three and live]) (;W[ns];B[ir]C[black lives, go proverb: capture three and live])))) (;W[ms];B[ls] (;W[ks];B[nr]C[black lives]) (;W[nr];B[oq]C[black lives, miai for life at marks]TR[nr]TR[ns]) (;W[oq];B[nr]C[black lives]) (;W[qs];B[nr]C[black lives])) (;W[oq];B[nr]TR[ls]TR[ms]C[black lives, miai for life at marks]) (;W[qs];B[oq] (;W[ks];B[nr] (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives])) (;W[ls];B[nr] (;W[ms];B[ks] (;W[ls];B[ms]C[black lives]) (;W[ms];B[ir]C[black lives]) (;W[ns];B[ir]C[black lives])) (;W[ks];B[ms]C[black lives])) (;W[ms];B[ls];W[ks];B[nr]C[black lives]) (;W[nr];B[ks] (;W[ls];B[ms] (;W[ks];B[nr]C[black lives]) (;W[nr];B[ks]C[ko, good for black, you can do better])) (;W[ms];B[ls]C[black live])))) (;B[ks]C[Black can capture the stones on the left like this, at most.];W[ls];B[ms] (;W[ps];B[ks]C[] (;W[oq];B[ir] (;W[nr]C[RIGHT]) (;W[js];B[is];W[nr]C[RIGHT])) (;W[nr];B[ir] (;W[oq]C[RIGHT]) (;W[js];B[is];W[oq]C[RIGHT]))) (;W[ks];B[nr])) (;B[ms]C[Black can capture the stones on the left like this, at most.] (;W[ps];B[ks] (;W[ls];B[hp]C[Assume H4 is a ko threat worth just less than this group. Answer that threat at A (H5) if you think Black is dead anyway.]LB[ho:A]MA[ms]MA[mr]MA[lr]MA[mq]MA[nq]MA[np]MA[op]MA[pq]MA[pr] (;W[ho];B[ks] (;W[oq];B[ir] (;W[nr]C[RIGHT]) (;W[js];B[is];W[nr]C[RIGHT])) (;W[nr];B[ir] (;W[oq]C[RIGHT]) (;W[js];B[is];W[oq]C[RIGHT]))) (;W[ks]C[Black got a free move!]) (;W[oq]C[Black got a free move an can still fight a ko for the 3 stones on the left to boot.]) (;W[nr]C[Black got a free move an can still fight a ko for the 3 stones on the left to boot.])) (;W[oq];B[ir] (;W[nr]C[RIGHT]) (;W[js];B[is];W[nr]C[RIGHT])) (;W[nr];B[ir] (;W[oq]C[RIGHT]) (;W[js];B[is];W[oq]C[RIGHT]))) (;W[ks];B[nr]) (;W[nr];B[oq];W[nr];B[ks]C[Ko]))) (;W[nr];B[ls] (;W[ks];B[ns]C[Black lives]) (;W[ms];B[ns]C[black lives]) (;W[ns];B[ks]TR[ir]C[black lives]) (;W[oq];B[ns]C[black lives])) (;W[ks];B[nr]C[black lives, miai at marks]TR[ls]TR[ms]) (;W[ls];B[ms] (;W[ks];B[nr]C[black lives]) (;W[ns];B[ks]C[good ko for black, you can do better]) (;W[nr];B[ks]C[good ko for black, you can do better]) (;W[oq];B[ks]C[good ko for black, you can do better])) (;W[ms];B[ls] (;W[ks];B[ns]C[black lives]) (;W[ns];B[nr]C[black lives]) (;W[nr];B[ns]C[black lives]) (;W[oq];B[nr]C[black lives])) (;W[oq];B[nr]C[black lives, miai for life at marks]TR[ls]TR[ms]) (;W[qs];B[nr] (;W[ks];B[ls] (;W[ps];B[oq]C[black lives]) (;W[ms];B[ps]C[black lives]) (;W[ns];B[ms];W[ps];B[oq]C[black lives])) (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[ns];B[ms]C[black lives]) (;W[ps];B[oq]TR[ls]TR[ms]C[black lives miai for life at marks])) (;W[ps];B[qs]C[no!])) (;W[oq];B[or]C[nope]) (;W[ks];B[or]C[black lives]) (;W[ls];B[or] (;W[ms];B[ns] (;W[ks];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[os];B[ps]C[black lives])) (;W[ks];B[ns] (;W[ms];B[ps]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives])) (;W[ns];B[ms] (;W[ks];B[os]C[black lives]) (;W[nr];B[os]C[black lives]) (;W[os];B[nr] (;W[ks];B[ps]C[black lives]) (;W[ps];B[qs] (;W[ks];B[ps]C[black lives]) (;W[rs];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ns];B[os]C[black lives]))) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[os];B[ns] (;W[ks];B[ms]C[black lives]) (;W[ms];B[ps]C[black lives]) (;W[ps];B[ms]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ps];B[ns]TR[ms]TR[os]C[black lives, miai for life at marks]) (;W[qs];B[ns]C[black lives]) (;W[nr];B[ns]C[black lives])) (;W[ms];B[or] (;W[ks];B[ls] (;W[ns];B[os]C[black lives]) (;W[nr];B[ns]C[black lives]) (;W[os];B[ns]C[black lives]) (;W[ps];B[ns]C[black lives])) (;W[ls];B[ns] (;W[ks];B[ps]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ns];B[ls] (;W[nr];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[nr];B[ns]C[black lives]) (;W[os];B[ls] (;W[ks];B[ns]C[black lives]) (;W[ns];B[ps]C[black lives]) (;W[nr];B[ns]C[black lives]) (;W[ps];B[ns]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ps];B[ns]C[black lives])) (;W[nr];B[or] (;W[ks];B[ns]C[black lives]) (;W[ls];B[ns]C[black lives]) (;W[ms];B[ns]C[black lives]) (;W[ns];B[ms] (;W[ks];B[os]C[black lives]) (;W[ls];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[os]C[black lives])) (;W[os];B[ns]C[black lives]) (;W[ps];B[ns]C[black lives])) (;W[ns];B[or] (;W[ks];B[ls] (;W[ms];B[os]C[black lives]) (;W[nr];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ls];B[ms] (;W[ks];B[os]C[black lives]) (;W[nr];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ms];B[ls] (;W[ks];B[os]C[black lives]) (;W[nr];B[os]C[black lives]) (;W[os];B[ps]C[black lives]) (;W[ps];B[os]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[nr];B[ls] (;W[ks];B[os]C[black lives]) (;W[ms];B[os]C[black lives]) (;W[os];B[ms] (;W[ks];B[ps]C[black lives]) (;W[ps];B[qs]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ps];B[ms] (;W[ks];B[os]C[black lives]) (;W[os];B[qs]C[black lives]) (;W[qs];B[os]C[black lives])) (;W[qs];B[ps]C[black lives])) (;W[os];B[ps] (;W[ks];B[ls]C[black lives]) (;W[ls];B[ms]C[black lives]) (;W[nr];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[qs];B[ms]C[black lives])) (;W[ps];B[os] (;W[ks];B[ms]C[black lives]) (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[nr];B[ms]C[black lives]) (;W[qs];B[ms]C[black lives])) (;W[qs];B[ps] (;W[ks];B[ls]C[black lives]) (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[nr];B[ms]C[black lives]) (;W[os];B[ms]C[black lives]))) (;W[os];B[or] (;W[ks];B[ns]C[black lives]) (;W[ls];B[ns]C[black lives] (;W[ks];B[ms]C[black lives]) (;W[ms];B[ps]C[black lives]) (;W[ps];B[ms]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[ms];B[ls] (;W[ks];B[ns]C[black lives]) (;W[ns];B[ps]C[black lives]) (;W[nr];B[ns]C[black lives]) (;W[ps];B[ns]C[black lives]) (;W[qs];B[ps]C[black lives])) (;W[nr];B[ns]C[black lives]) (;W[ns];B[ps] (;W[ks];B[ls]C[black lives]) (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[nr];B[ms]C[black lives]) (;W[qs];B[ms]C[black lives])) (;W[ps];B[ns]C[black lives])) (;W[ps];B[or] (;W[ks];B[ns]C[black lives]) (;W[ls];B[ns]C[black lives]) (;W[ms];B[ns]C[black lives]) (;W[ns];B[os] (;W[ks];B[ls]C[black lives]) (;W[ls];B[ms]C[black lives]) (;W[ms];B[ls]C[black lives]) (;W[nr];B[ms]C[black lives])) (;W[nr];B[ns]C[black lives]) (;W[os];B[ns]C[black lives])))