Problem	6740
Created	2005-06-20
Source
Rating

Difficulty	15.2 kyu
Average Solve Time	32 secs
User Attempts	5256 / 12096
Solve Ratio Rating	7 kyu
	rating history

This is a common cutting tesuji that is good to know. It came up in a recent tournament game.

(;AB[ic]AB[jc]AB[lb]AB[mb]AB[hb]AB[gb]AW[hc]AW[gc]AW[id]AW[jd]AW[kd]AW[lc]AW[mc]AB[fb]AB[ob]AW[nc]AB[nb]C[White to cut black.]AP[goproblems] (;W[kc];B[kb]) (;W[ib];B[kb]) (;W[jb];B[kb] (;W[ib];B[kc]) (;W[kc];B[ib])) (;W[ka];B[kb]) (;W[ia];B[kb]) (;W[ja];B[kb]) (;W[kb] (;B[jb]C[CHOICE] (;W[kc];B[ka]) (;W[ja];B[ia] (;W[kc];B[ka]) (;W[la];B[ka]MA[ja]C[Ko. The connection at L19 instead of M19 prevents this.]) (;W[ka]TR[kc]C[Correct. Black is short of liberties and cannot cut at L17.RIGHT]))) (;B[ka]C[CHOICE] (;W[ja];B[kc];W[ib]C[Snapback!RIGHT]) (;W[kc];B[jb]) (;W[ib];B[jb]) (;W[ia];B[jb]) (;W[jb];B[ib] (;W[kc];B[ja]) (;W[ja];B[kc]))) (;B[kc];W[ib]C[RIGHT]) (;B[ia] (;W[kc];B[ka] (;W[ib];B[jb]) (;W[jb];B[ja]) (;W[la];B[ja])) (;W[ka];B[kc]) (;W[jb];B[ib];W[kc]C[RIGHT]) (;W[ja] (;B[kc];W[ib]C[Snapback!RIGHT]) (;B[jb];W[ka]C[RIGHT]))) (;B[ja]C[CHOICE] (;W[kc];B[ka]) (;W[ka];B[kc];W[ib]C[RIGHT]) (;W[jb];B[ib] (;W[kc];B[ka]) (;W[ka];B[kc])) (;W[ib]C[];B[ka] (;W[jb];B[ia]) (;W[ia];B[jb])) (;W[ia];B[ib] (;W[jb];B[kc]) (;W[kc];B[ka]) (;W[ka];B[kc])))))