Problem	12654
Created	2009-05-07
Name	a life for a gate
Source	go book
Rating

Difficulty	8 dan
Average Solve Time	97 secs
User Attempts	47 / 301
Solve Ratio Rating	1 dan
	rating history

The bottom black group is in a gate shape, which can not make two eyes by itself. But the corner white is alive. Then where is the way to the life?

(;AW[rr]AW[rp]AW[qp]AW[pq]AW[pr]AB[pp]AB[op]AB[oq]AB[or]AB[np]AB[mp]AB[lp]AB[lq]AB[lr]AB[qo]AB[ro]AB[qm]AB[rm]AW[po]AW[oo]AW[no]AW[mo]AW[lo]AW[kp]AW[kr]AW[jr]AW[jo]AP[goproblems] (;B[sp] (;W[sq] (;B[ps];W[qr] (;B[nr];W[mq];B[os];W[ms];B[ls];W[mr]C[RIGHT]) (;B[os];W[ls])) (;B[qq];W[rq] (;B[ps];W[qr];B[nr];W[os];B[mq];W[ms];B[ls]C[RIGHT]) (;B[nr];W[os] (;B[mq];W[ms];B[ls];W[ns]) (;B[ns];W[ls];B[ps];W[qr]))) (;B[nr];W[os] (;B[mq];W[ms] (;B[ls];W[ns];B[qq];W[rq]) (;B[qq];W[rq];B[ls];W[ns])) (;B[qq];W[rq] (;B[mq];W[ms];B[ls];W[ns]) (;B[ns];W[ls];B[ps];W[qr])))) (;W[rq]C[CHOICE] (;B[ps];W[qs] (;B[mr];W[ls];B[nq];W[ns]) (;B[nr];W[os])) (;B[os];W[ls] (;B[ms];W[nr] (;B[sr] (;W[sq]C[CHOICE] (;B[qs] (;W[qr];B[rs]C[RIGHT]) (;W[rs];B[qr]C[RIGHT])) (;B[ps];W[qs]) (;B[mr]C[NOTTHIS])) (;W[qr];B[sq];W[ps];B[rs];W[ks];B[mr];W[nq];B[so];W[kq];B[ss];W[ns];B[mq];W[nr];B[qs]C[RIGHT])) (;B[mr]C[NOTTHIS]) (;B[qs];W[qr];B[rs];W[ps];B[sr];W[ss];B[rs];W[sq])) (;B[mr]C[NOTTHIS]) (;B[sr];W[sq] (;B[ms];W[nr]) (;B[qs];W[qr];B[rs]C[RIGHT]))) (;B[sr];W[sq];B[os] (;W[ls]C[CHOICE] (;B[ms];W[nr] (;B[qs] (;W[qr];B[rs]C[RIGHT]) (;W[rs];B[qr]C[RIGHT])) (;B[ps];W[qs]) (;B[mr]C[NOTTHIS])) (;B[qs];W[qr];B[rs]C[RIGHT])) (;W[ps];B[mr]C[RIGHT])))) (;B[ps];W[qs] (;B[mr];W[ls] (;B[nq];W[ns]) (;B[ms] (;W[nq]) (;W[os]))) (;B[nr];W[os]) (;B[os];W[ls];B[sp];W[rq])) (;B[nr];W[os];B[mq];W[ms]) (;B[os];W[ls];B[ms];W[nr] (;B[sp];W[sq];B[ps];W[qr]) (;B[mr]C[NOTTHIS])) (;B[ls];W[os]))