Problem	4075
Created	2004-03-15
Source	Japanese book
Rating

Difficulty	7 dan
Average Solve Time	75 secs
User Attempts	177 / 1873
Solve Ratio Rating	3 dan
	rating history

Black to live.

(; AW[ob][nc][pc][rc][rd][oe][re][pf][qf][pg][sg][ph][pi][qi][qk] AB[qb][rb][qc][qd][qe][rf][qg][qh][rh] (;B[sh];W[se] (;B[sc];W[ri] (;B[sb] (;W[si] (;B[sd];W[rg];B[sf]C[RIGHT CHOICE ]) (;B[rg];W[sf]C[CHOICE ]) (;B[sf];W[rg]C[CHOICE ]) ) (;W[sf] (;B[sd];W[rg];B[rf]C[RIGHT CHOICE ]) (;B[rg];W[si]C[CHOICE ]) ) ) (;B[sf];W[rg]) (;B[rg];W[si]) (;B[si];W[sf]) ) (;B[sf];W[rg]) (;B[rg];W[ri] (;B[sf];W[si]) (;B[sc];W[si]) ) ) (;B[sc];W[rg]) (;B[se];W[sf] (;B[sh] (;W[sd] (;B[rg];W[ri];B[se];W[sf];B[sb];W[si]) (;B[sb];W[rg]) ) (;W[rg];B[rf]) ) (;B[rg];W[sd] (;B[sb];W[ri];B[sc];W[sh]) (;B[sh];W[ri];B[se];W[sf];B[sb];W[si]) ) ) (;B[rg];W[ri]) (;B[ri];W[rg]) (;B[sf];W[se] (;B[sc];W[rg]) (;B[rg];W[ri];B[sh];W[si]) ) )