Problem 15620 goproblems.com


Author	krt	Created	2012-01-01
Difficulty	22 kyu (history)	Source	~
AVG solve time	33 sec	Stars	3.5 (24 votes)
User attempts	4426 / 8194	Collections	Fun
Genre	life and death	Your attempts	N/A
Similar problems
Created	2012-01-01
Source	~
Stars	3.5 (24 votes)
Collections	Fun
Your attempts	N/A

(;AB[bs]AB[br]AB[bq]AB[bn]AB[bo]AB[bp]AB[ra]AB[rb]AB[rc]AB[rd]AW[qa]AW[qb]AW[qc]AW[qd]AW[qe]AW[re]AW[rg]AW[cm]AW[cn]AW[co]AW[cp]AW[cq]AW[cr]AW[lr]AW[nr]AW[nq]AW[oq]AW[pq]AW[qq]AW[rq]AW[sq]AB[or]AB[pr]AB[qr]AB[rr]AB[sr]AW[bm]AW[bk]C[Kill whatever needs killing.]AP[goproblems] (;W[sd];B[os]C[Black saves the group you could kill. The upper right corner was already dead.]) (;W[os] (;B[ps];W[rs]C[RIGHT]) (;B[cs];W[er];B[ds];W[fq];B[es];W[fs];B[dr];W[dq]C[Just for reference; Black can intrude on White but not that far.RIGHT])) (;W[rs];B[os];W[qs]C[RIGHT]) (;W[an];B[ao] (;W[aq];B[ar] (;W[os];B[ps];W[rs]C[RIGHT]) (;W[rs];B[os];W[qs]C[RIGHT]) (;W[am];B[os]C[Black saves the group you could kill.])) (;W[os]C[];B[ps];W[rs]C[RIGHT]) (;W[rs]C[];B[os];W[qs]C[RIGHT]) (;W[ar];B[aq] (;W[os];B[ps];W[rs]C[RIGHT]) (;W[rs];B[os];W[qs]C[RIGHT]) (;W[am];B[os]C[Black saves the group you could kill.])) (;W[am];B[os]C[Black saves the group you could kill.])) (;W[am];B[os]C[Black saves the group you could kill. The lower left is still alive.]) (;W[cs];B[os]C[C1 is worth 7 points in gote (reverse sente) if the lower side is indeed White's territory, which is not certain yet. The corner Black just saved is bigger.]) (;W[ar];B[an] (;W[aq];B[os]MA[ap]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.]) (;W[ap];B[os]MA[aq]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.]) (;W[os]C[RIGHT]) (;W[rs]C[RIGHT])) (;W[aq];B[an] (;W[os]C[RIGHT]) (;W[rs]C[RIGHT]) (;W[ap];B[os]MA[ar]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.]) (;W[ar];B[os]MA[ap]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.])) (;W[ap];B[an] (;W[os]C[RIGHT]) (;W[rs]C[RIGHT]) (;W[aq];B[os]MA[ar]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.]) (;W[ar];B[os]MA[aq]C[Black saves the lower right corner. All you can get on the lower left is a gote seki.])) (;W[ao];B[an] (;W[os]C[RIGHT]) (;W[rs]C[RIGHT])) (;W[ps];B[os]) (;W[qs];B[rs]) (;W[ss];B[os]))