(;GM[1]FF[4]SZ[19]AP[SmartGo:0.6.7.1]CA[utf-8]
GN[prob_631]
AB[rd:re][qf:qg][qi]
AW[qc:qe][rf:sf][rh]
C[Black's best sequence locally?

Source:
    From the endgame volume of Gokyo Seimyo, a nearly 200 year old problem set.]
;B[rg]
C[OK, the first move is obvious.  But after a quick glance, you might think that Black can only hope to limit White's damage down the right side.]
;W[sg]
C[Now what?];B[si]
C[The tesuji!  The marked stone gives Black an otherwise unavailable resource.]
TR[qi];W[ri]
(;B[se]
C[Correct move order.];W[sh];B[rj];W[sj];B[qh]TR[rd:re][se]
C[Black saves the 3 stones.])
(;B[rj]
C[Trying to capture all the side stones is too greedy.];W[rc]
C[Now Black is the one with the liberty shortage.]))

