Problem 9472 goproblems.com


Author	tossy	Created	2006-11-23
Difficulty	3 kyu (history)	Source	original
AVG solve time	53 sec	Stars	4.3 (10 votes)
User attempts	715 / 2519	Collections	Corner based, Double Ko
Genre	life and death ⓒ	Your attempts	N/A
Similar problems
Created	2006-11-23
Source	original
Stars	4.3 (10 votes)
Collections	Corner based, Double Ko
Your attempts	N/A

(;AW[rq]AW[rp]AW[qq]AW[pr]AB[pq]AB[oq]AB[nr]AB[qp]AB[ro]AB[rn]AB[po]AB[qs]C[White to live]AP[goproblems] (;W[rs] (;B[rr]C[CHOICE] (;W[qr];B[ss] (;W[sr];B[sq] (;W[sp] (;B[or] (;W[ps]C[White lives with double-KoRIGHT]) (;W[sr]C[RIGHT];B[mm]C[Finally white lives with double Ko. Check it at KTRIGHT]LB[nm:KT] (;W[nm];B[sq] (;W[ps]C[nice double KoRIGHT]) (;W[os]C[NOTTHIS])) (;W[rs]C[NOTTHIS]) (;W[ps]C[NOTTHIS]) (;W[sq]C[NOTTHIS]))) (;B[ps] (;W[os];B[or];W[rs];B[qs];W[ps]C[White lives with double-KoRIGHT]) (;W[sr]C[RIGHT];B[mm]C[Finally white lives with double Ko. Check it at KTRIGHT]LB[nm:KT] (;W[nm];B[sq] (;W[os];B[or] (;W[sr]C[NOTTHIS]) (;W[rs];B[qs] (;W[ps]C[nice double KoRIGHT]) (;W[sr]C[NOTTHIS]))) (;W[or]C[NOTTHIS])) (;W[sq]C[NOTTHIS]) (;W[rs]C[NOTTHIS]) (;W[os]C[NOTTHIS]) (;W[or]C[NOTTHIS])))) (;W[ps];B[sp]C[You could avoid Ko])) (;W[sp];B[sr] (;W[or];B[os]) (;W[ps];B[rs]) (;W[os];B[or])) (;W[ps];B[sp] (;W[sq];B[rs]) (;W[rs]C[You could avoid Ko])) (;W[or];B[sp] (;W[sq];B[os]) (;W[ps];B[rs])) (;W[os];B[sp] (;W[sq];B[rs]) (;W[ps];B[rs]))) (;W[sr];B[ss] (;W[sq];B[rs]) (;W[qr];B[sq] (;W[ps];B[sp]C[You could avoid Ko]) (;W[sp] (;B[or] (;W[ps]C[White lives with double-KoRIGHT]) (;W[sr]C[RIGHT];B[mm]C[Finally white lives with double Ko. Check it at KTRIGHT]LB[nm:KT] (;W[nm];B[sq] (;W[ps]C[nice double KoRIGHT]) (;W[os]C[NOTTHIS])) (;W[rs]C[NOTTHIS]) (;W[ps]C[NOTTHIS]))) (;B[ps] (;W[os];B[or];W[rs];B[qs];W[ps]C[White lives with double-KoRIGHT]) (;W[sr]C[RIGHT];B[mm]C[Finally white lives with double-Ko. Check it at KT RIGHT]LB[nm:KT] (;W[nm];B[sq] (;W[os];B[or] (;W[sr]C[NOTTHIS]) (;W[rs];B[qs] (;W[sr]C[NOTTHIS]) (;W[ps]C[nice double KoRIGHT]))) (;W[or]C[NOTTHIS])) (;W[rs]C[NOTTHIS]) (;W[os]C[NOTTHIS]))))) (;W[sp];B[qr]C[You could avoid Ko]) (;W[ps];B[sq] (;W[qr];B[sp]C[You could avoid Ko]) (;W[sp];B[qr]C[You could avoid Ko]))) (;W[sp];B[sr]) (;W[ps];B[ss] (;W[sp];B[sr]) (;W[qr];B[sp]C[You could avoid Ko] (;W[sq];B[rs]) (;W[rs]C[You could avoid Ko])) (;W[sr];B[sq] (;W[qr];B[sp]C[You could avoid Ko]) (;W[sp];B[qr]C[You could avoid Ko]))) (;W[or];B[sr]) (;W[os];B[sr])) (;B[ps] (;W[sr];B[qr] (;W[sp]C[RIGHT]) (;W[rr];B[or];W[sp]C[RIGHT])) (;W[qr];B[sr];W[os]C[RIGHT]) (;W[os];B[or];W[qr];B[ps] (;W[sr]C[RIGHT]) (;W[sp];B[sr]) (;W[qs];B[sr]))) (;B[sp] (;W[ps]C[RIGHT]) (;W[sr]C[RIGHT]) (;W[sq]C[RIGHT]) (;W[qr]C[RIGHT]) (;W[or];B[qr];W[rr];B[sq]) (;W[rr];B[ps];W[os];B[or]))) (;W[ps];B[rs] (;W[rr];B[sp];W[sq];B[ss]) (;W[qr];B[sp]) (;W[sr];B[sp]) (;W[sp];B[sr])) (;W[qr];B[rs] (;W[ps];B[sp]) (;W[sp];B[ps]) (;W[sr];B[sp]) (;W[or];B[sp]) (;W[os];B[sp])) (;W[sr];B[rs] (;W[sp];B[ps]) (;W[qr];B[sp]) (;W[ps];B[sp])) (;W[rr];B[ps]) (;W[sp];B[ps] (;W[rs];B[sr];W[os];B[or];W[qr];B[ps]) (;W[os];B[or] (;W[qr];B[rs]) (;W[rs];B[sr] (;W[rr];B[ns]) (;W[qr];B[ps])))) (;W[or];B[qr]) (;W[os];B[qr] (;W[rs];B[sr] (;W[sq];B[rr]) (;W[sp];B[rr]) (;W[ps];B[rr]) (;W[rr];B[sp] (;W[sq];B[ss]) (;W[ps];B[sq]))) (;W[rr];B[sp] (;W[sq];B[rs]) (;W[rs];B[sq] (;W[sr];B[ss]) (;W[ps];B[sr])) (;W[ps];B[sr] (;W[sq];B[rs]) (;W[rs];B[sq])) (;W[sr];B[rs]))) (;W[sq];B[qr]) (;W[so];B[qr]))