Problem	1967
Created	2003-02-25
Name	Seven 7x7 life & death endgames (6)
Source	ferdi
Rating

Difficulty	8 dan
Average Solve Time	52 secs
User Attempts	346 / 2674
Solve Ratio Rating	2 dan
	rating history

In this position, most of the action takes place inside the groups....

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[7]KM[0.50]TM[] AW[ea][fa][ga][ab][bb][eb][cc][dc][ec][dd][gd][de][df][dg][eg]AB[da][fb][gb][ac][bc][fc][cd][ed][fd][ae][be][ce][fe][cf][ef][fg]C[No komi, no prisoners - White to play and draw!]PL[W] (;W[gf]CR[gf] (;B[ff]CR[ff] (;W[ge]CR[ge] (;B[ba]CR[ba] ;W[cb]CR[cb] ;B[ca]CR[ca] (;W[bg]CR[bg] ;B[cg]CR[cg] (;W[af]CR[af]C[The third seki (Black can't play B b2 because of W a4 or W b4) - and a jigo! RIGHT]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[af]CR[af]C[Black wins by one point! There was no need to sacrifice a stone....]) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[af]CR[af]C[Black wins by one point! There was no need to sacrifice a stone....])) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by 1 point! There was no need to sarifice a stone...]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by one point! There was no need to sacrifice a stone....]) (;W[cg]CR[cg] ;B[bg]CR[bg]C[Black wins by five points!])) (;B[cg]CR[cg] ;W[ca]CR[ca]C[This is also a jigo.])) (;W[ca]CR[ca] (;B[ge]CR[ge] (;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Jigo! RIGHT CHOICE]) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by one point! There is no need to sacrifice a stone....]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by one point! There is no need to sacrifice a stone...])) (;B[cg]CR[cg] ;W[ge]CR[ge]C[Jigo! RIGHT CHOICE])) (;W[cb]CR[cb] (;B[ge]CR[ge] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Jigo! RIGHT CHOICE]) (;B[cg]CR[cg] ;W[ge]CR[ge]C[Jigo! RIGHT CHOICE]))) (;B[ge]CR[ge] ;W[ff]CR[ff] ;B[gg]CR[gg] ;W[ff]CR[ff] (;B[ee]CR[ee] ;W[gf]CR[gf]C[Black is dead - there is no time for B f1]) (;B[gf]CR[gf] ;W[ee]CR[ee]C[Black is dead!]))) (;W[ee]CR[ee] ;B[ff]CR[ff] (;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af] ;B[cb]CR[cb]C[Uh-oh.... ATARI!]) (;W[ca]CR[ca] ;B[cg]CR[cg]C[This is a 6 point loss for white.]) (;W[cg]CR[cg] ;B[cb]CR[cb]C[White is dead!])) (;W[bg]CR[bg] ;B[cg]CR[cg] (;W[af]CR[af] ;B[cb]CR[cb]C[White is dead!]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[af]CR[af] ;B[cb]CR[cb]C[White is dead!]) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[af]CR[af] ;B[cb]CR[cb]C[White is dead!])) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af] ;B[cb]CR[cb]C[White is dead!]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af] ;B[cb]CR[cb]C[White is dead!]) (;W[ca]CR[ca] ;B[ee]CR[ee] (;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by one point!]) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by two points!]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[bg]CR[bg] ;B[cg]CR[cg] ;W[af]CR[af]C[Black wins by two points!])) (;W[cb]CR[cb] ;B[ee]CR[ee] ;W[bg]CR[bg] ;B[cg]CR[cg] (;W[af]CR[af]C[Black wins by one point!]) (;W[ad]CR[ad] ;B[bd]CR[bd] ;W[af]CR[af]C[Black wins by two points!]) (;W[bd]CR[bd] ;B[ad]CR[ad] ;W[af]CR[af]C[Black wins by two points!])) (;W[cg]CR[cg] ;B[bg]CR[bg] (;W[ee]CR[ee] ;B[ff]CR[ff] (;W[cb]CR[cb]C[Black wins by five points!]) (;W[ca]CR[ca]C[Black wins by five points!])) (;W[gf]CR[gf] ;B[ff]CR[ff] ;W[ge]CR[ge] ;B[cb]CR[cb]C[White is dead!])))