Problem 6696 goproblems.com


Author	kochi	Created	2005-06-13
Difficulty	4 dan (history)	Source	chinese go book
AVG solve time	46 sec	Stars	3.5 (4 votes)
User attempts	285 / 1840	Collections	Corner based
Genre	life and death ⓒ	Your attempts	N/A
Similar problems
Created	2005-06-13
Source	chinese go book
Stars	3.5 (4 votes)
Collections	Corner based
Your attempts	N/A

(;AB[rq]AB[rr]AB[qq]AB[or]AB[nr]AW[mr]AW[mq]AW[np]AW[oq]AW[pp]AW[qp]AW[rp]AW[sp]AP[goproblems] (;W[pq];B[pr] (;W[sr];B[rs] (;W[ns];B[sq]) (;W[sq];B[qs])) (;W[sq];B[sr] (;W[qs];B[rs]) (;W[ns];B[os];W[qs];B[rs])) (;W[ns];B[qs] (;W[sq];B[sr]) (;W[sr];B[sq]) (;W[os];B[sq])) (;W[os];B[qs]) (;W[ps];B[qs];W[sr];B[sq]) (;W[qs];B[rs] (;W[ns];B[sq];W[os];B[ps]) (;W[sq];B[sr])) (;W[rs];B[sq] (;W[qs];B[ps] (;W[ns];B[ss];W[sr];B[qr]) (;W[sr];B[qr]) (;W[ss];B[ns]) (;W[qr];B[ss])) (;W[sr];B[qr] (;W[ss];B[qs]) (;W[ns];B[qs]) (;W[qs];B[ps]) (;W[os];B[qs])) (;W[ss];B[qs]) (;W[ps];B[os] (;W[qr];B[qs]) (;W[qs];B[ss];W[sr];B[qr]) (;W[sr];B[qr];W[nq];B[qs]) (;W[ss];B[qs]))) (;W[ss];B[rs])) (;W[sq];B[pr] (;W[qs];B[sr] (;W[ns];B[rs]) (;W[pq];B[rs]) (;W[rs];B[ns] (;W[pq];B[qr]) (;W[qr];B[pq]))) (;W[rs];B[sr] (;W[qs];B[ns] (;W[pq];B[qr]) (;W[qr];B[pq])) (;W[pq];B[qs]) (;W[ps];B[ns]) (;W[ns];B[qs])) (;W[sr];B[qs] (;W[rs];B[pq]) (;W[pq];B[rs]) (;W[ns];B[os] (;W[pq];B[rs]) (;W[rs];B[pq]))) (;W[ss];B[sr] (;W[qs];B[rs]) (;W[pq];B[qs])) (;W[ns];B[qs] (;W[sr];B[os] (;W[pq];B[rs]) (;W[rs];B[pq])) (;W[os];B[sr])) (;W[ps];B[qs] (;W[sr];B[rs]) (;W[pq];B[sr]))) (;W[sr];B[pr] (;W[rs];B[sq] (;W[pq];B[qr] (;W[ns];B[qs]) (;W[ss];B[qs]) (;W[qs];B[ps])) (;W[qs];B[ps];W[pq];B[qr]) (;W[ns];B[qs]) (;W[ps];B[os];W[pq];B[qr];W[nq];B[qs]) (;W[os];B[qs];W[pq];B[ss])) (;W[sq];B[qs] (;W[pq];B[rs]) (;W[rs];B[pq])) (;W[ss];B[sq] (;W[pq];B[qs]) (;W[qs];B[rs])) (;W[qs];B[sq];W[rs];B[ps] (;W[pq];B[qr]) (;W[ns];B[qr])) (;W[ns];B[qs] (;W[sq];B[os] (;W[rs];B[pq]) (;W[pq];B[rs])) (;W[pq];B[sq]))) (;W[ss];B[pr]) (;W[pr];B[pq] (;W[ps] (;B[sq]C[CHOICE] (;W[ns];B[qs] (;W[qr];B[os]) (;W[nq];B[ss])) (;W[rs];B[ss] (;W[qs];B[os];W[sr]C[ko, buy why did you play r1? that wasted a threat.RIGHT]) (;W[sr]C[ko, goodRIGHT]) (;W[ns];B[qs]) (;W[os];B[qs]) (;W[nq];B[qs]) (;W[qr];B[qs]C[ko, b takes first. not best.])) (;W[qr];B[os]) (;W[qs];B[rs] (;W[ns];B[qr]) (;W[sr];B[os]) (;W[ss];B[os])) (;W[ss];B[qs] (;W[ns];B[qr]) (;W[os];B[ns]) (;W[qr];B[os]) (;W[rs];B[sr] (;W[rs];B[os]) (;W[ss];B[os]) (;W[ns];B[qr] (;W[rs];B[os]) (;W[ss];B[os])) (;W[os];B[ns])) (;W[sr];B[os])) (;W[sr];B[qs] (;W[ns];B[ss]) (;W[ss];B[os]) (;W[qr];B[os]) (;W[os];B[ns])) (;W[os];B[qs] (;W[ss];B[ns]) (;W[ns];B[ss])) (;W[ms];B[qs] (;W[ss];B[os]) (;W[rs];B[ss]) (;W[sr];B[ss]) (;W[os];B[ss]) (;W[ns];B[ss]))) (;B[qs]C[CHOICE] (;W[rs];B[ss]C[CHOICE] (;W[sq];B[sr] (;W[ns]C[Yes. however, B r1 was a mistake. if he'd played t3 it would have been ko.RIGHT]) (;W[os];B[ns]) (;W[nq]C[Yes. however, B r1 was a mistake. if he'd played t3 it would have been ko.RIGHT])) (;W[sr];B[sq]) (;W[ns];B[sq])) (;W[sq];B[sr] (;W[rs];B[os]) (;W[ns];B[qr]) (;W[os];B[qr])) (;W[sr];B[sq] (;W[ns];B[ss]) (;W[ss];B[os])))) (;W[sq];B[ps] (;W[ns];B[qr]) (;W[qs];B[qr]) (;W[rs];B[qr] (;W[ns];B[sr]) (;W[sr];B[ns])) (;W[sr];B[ns];W[rs];B[qr])) (;W[sr];B[ps] (;W[rs];B[qr] (;W[ns];B[sq]) (;W[sq];B[ns])) (;W[sq];B[ns];W[rs];B[qr]) (;W[ns];B[qr];W[rs];B[sq])) (;W[qr];B[ps] (;W[sq];B[qs]) (;W[qs];B[rs]) (;W[sr];B[qs]) (;W[ns];B[qs])) (;W[qs];B[rs] (;W[sq];B[qr] (;W[ns];B[ps]) (;W[ps];B[os] (;W[sr];B[ps]) (;W[ps];B[sr]))) (;W[os];B[qr] (;W[ns];B[ps]) (;W[ps];B[ns];W[ps];B[sq])) (;W[ns];B[qr];W[ps];B[os]) (;W[sr];B[qr])) (;W[rs];B[ps] (;W[sr];B[qr];W[sq];B[ns]) (;W[sq];B[qr] (;W[ns];B[sr]) (;W[sr];B[ns])) (;W[ns];B[qr];W[sr];B[sq])) (;W[ns];B[ps] (;W[sq];B[sr]) (;W[sr];B[sq] (;W[rs];B[qr]) (;W[qs];B[qr])) (;W[rs];B[sq] (;W[sr];B[qr]) (;W[ss];B[qr]))) (;W[os];B[qr] (;W[ns];B[ps] (;W[ms];B[rs]) (;W[rs];B[ms]) (;W[sq];B[ms])) (;W[ps];B[qs]) (;W[qs];B[rs] (;W[ns];B[ps]) (;W[ps];B[ns];W[ps];B[sq])) (;W[sr];B[ps];W[ns];B[ms];W[ns];B[sq]) (;W[sq];B[ps]))) (;W[ps];B[pr] (;W[sq];B[qs] (;W[sr];B[rs]) (;W[pq];B[sr])) (;W[pq];B[qs];W[sr];B[sq]) (;W[qs];B[rs];W[sq];B[sr]) (;W[ns];B[os] (;W[qs];B[rs]) (;W[sq];B[sr] (;W[rs];B[qs]) (;W[qs];B[rs]))) (;W[sr];B[qs] (;W[pq];B[sq]) (;W[sq];B[pq];W[rs];B[os]))) (;W[qr];B[qs] (;W[pr];B[pq] (;W[sr];B[ps]) (;W[sq];B[sr])) (;W[pq];B[pr]) (;W[sq];B[pr]) (;W[sr];B[pr])) (;W[qs];B[pr] (;W[sq];B[sr] (;W[rs];B[ns] (;W[pq];B[qr]) (;W[qr];B[pq])) (;W[ns];B[rs])) (;W[ns];B[rs]) (;W[rs];B[sq] (;W[ss];B[ns]) (;W[ns];B[ss] (;W[sr];B[ps];W[pq];B[qr]) (;W[os];B[ps];W[sr];B[qr])) (;W[pq];B[ps] (;W[sr];B[qr]) (;W[ss];B[ns]) (;W[ns];B[ss];W[sr];B[qr])) (;W[ps];B[ns] (;W[sr];B[qr] (;W[ms];B[os]) (;W[pq];B[os])) (;W[qr];B[pq] (;W[ms];B[os]) (;W[nq];B[os])))) (;W[sr];B[sq];W[rs];B[ps];W[pq];B[qr])) (;W[rs];B[pr] (;W[sr];B[sq] (;W[qs];B[ps] (;W[ns];B[qr]) (;W[pq];B[qr])) (;W[ns];B[qs]) (;W[pq];B[qr] (;W[ss];B[qs]) (;W[ns];B[qs]) (;W[qs];B[ps]))) (;W[qs];B[ns] (;W[sr];B[sq];W[pq];B[qr] (;W[ms];B[ps]) (;W[ps];B[os])) (;W[sq];B[sr] (;W[pq];B[ps]) (;W[ps];B[pq])) (;W[pq];B[qr] (;W[sq];B[sr]) (;W[sr];B[sq] (;W[ms];B[ps]) (;W[ps];B[os])) (;W[ps];B[sq];W[sr];B[os])) (;W[ps];B[sq] (;W[pq];B[qr];W[sr];B[os]) (;W[sr];B[qr] (;W[ms];B[os]) (;W[pq];B[os]))) (;W[qr];B[pq] (;W[ps];B[sq] (;W[sr];B[os]) (;W[ms];B[os])) (;W[sq];B[ps]) (;W[sr];B[ps];W[sq];B[ss];W[rs];B[qs]))) (;W[ns];B[qs] (;W[sr];B[sq]) (;W[os];B[ss])) (;W[sq];B[qs] (;W[sr];B[pq]) (;W[pq];B[sr]))) (;W[os];B[pr] (;W[ns];B[qs]) (;W[sq];B[qs])) (;W[ns];B[pr] (;W[qs];B[rs]) (;W[rs];B[qs] (;W[sr];B[sq]) (;W[sq];B[sr])) (;W[os];B[qs])))