Problem	2268
Created	2003-05-21
Name	mixed 4x4 (4/4)
Source	ferdi
Rating

Difficulty	5.6 kyu
Average Solve Time	32 secs
User Attempts	1230 / 3894
Solve Ratio Rating	4 kyu
	rating history

Please find the best result for Black!
(japanese rules)

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[4]KM[0.00] PW[Weiß]PB[Schwarz]AW[ba][da][bb][cd][dd]AB[ab][ac][bd]C[Black to play - what's the best he can do?] (;B[bc]CR[bc] (;W[cb]CR[cb] ;B[cc]CR[cc] ;W[dc]CR[dc] ;B[db]CR[db] ;W[dc]CR[dc]C[Seki, Black wins by two points - 3 prisoners against 1 RIGHT]) (;W[db]CR[db] ;B[cc]CR[cc] ;W[dc]CR[dc] ;B[cb]CR[cb]C[White is lost]) (;W[dc]CR[dc] ;B[cb]CR[cb]C[White is dead]) (;W[cc]CR[cc] ;B[cb]CR[cb]C[White is dead])) (;B[cc]CR[cc] (;W[bc]CR[bc] ;B[dc]CR[dc] ;W[cd]CR[cd] ;B[dd]CR[dd] ;W[cb]CR[cb]C[White wins!]) (;W[cb]CR[cb]C[This gives Black a chance to reach the solution] ;B[bc]CR[bc] ;W[dc]CR[dc] ;B[db]CR[db] ;W[dc]CR[dc]C[Black wins by two points, but W C3 was clearly a mistake....])))