Problem	8307
Created	2006-03-19
Source	KNX vs. gnugogo
Rating

Difficulty	18.5 kyu
Average Solve Time	33 secs
User Attempts	6295 / 11044
Solve Ratio Rating	12 kyu
	rating history

(;AB[da]AB[db]AB[ea]AB[cc]AB[bd]AB[dd]AW[fa]AW[eb]AW[dc]AW[ec]AW[fc]AB[ba]AW[bf]AW[cf]AW[ef]AW[fe]AW[ff]AW[fg]AW[cb]LB[ba:1]LB[cb:2]C[You just realized that 1 is not the best way to defend the corner. Save this situation if it is possible. (T for Tenuki)]LB[cg:T]AW[gb]AW[dg]AP[goproblems] (;B[bb];W[ca]AW[dg] (;B[ac];W[ce] (;B[cd]C[Very good. The best you can do!RIGHT]) (;B[ad];W[cd]C[The corner is lost.]) (;B[be];W[cd] (;B[ae];W[bc]C[Ko. You can do better!]) (;B[bc];W[ae]C[Only one eye.])) (;B[ab];W[cd] (;B[be];W[ae]C[The corner is lost.]) (;B[ad]C[The corner is lost.])) (;B[ae];W[cd];B[be];W[bc]C[Ko. You can do better!])) (;B[ce];W[ac] (;B[be];W[de] (;B[ad];W[ab]C[The corner is lost.]) (;B[bc];W[ab]C[No way to make two eyes now.]) (;B[ab];W[bc];B[ad]C[YesRIGHT])) (;B[de];W[be];B[ad];W[ab]C[The corner is lost!]) (;B[bc];W[be];B[ad];W[ab]C[The corner is lost.]) (;B[ad];W[ab];B[be];W[de]C[The corner is lost.]) (;B[ae];W[ab] (;B[bc];W[be]C[The corner is lost.]) (;B[ad];W[be]C[The corner is lost.])) (;B[ab];W[ad] (;B[ae];W[be];B[bc];W[ad]C[No way to make two eyes now.]) (;B[bc];W[be];B[ae];W[ad]C[No way to make two eyes now.]) (;B[be];W[ae] (;B[bc];W[af];B[de]C[Yes!RIGHT]) (;B[de]C[Very Good! White cannot cut at B17.RIGHT])))) (;B[ab];W[ad] (;B[ae];W[be];B[ac]C[Yes! RIGHT]) (;B[be];W[ae];B[ac];W[af];B[ce];W[de]C[The group is dead.]) (;B[ac];W[ae];B[ce];W[be]C[B17 is false.]) (;B[bc];W[be]C[The group is dead.]) (;B[ce];W[be];B[ac];W[ae]C[B17 is false.])) (;B[ad]C[Yes. That is life!RIGHT]) (;B[ae];W[ac];B[ab];W[ad] (;B[be]C[Very good!RIGHT]) (;B[cd];W[be]C[Only one eye.];B[bc];W[ad])) (;B[be];W[ac];B[ab];W[ad];B[ae]C[Very good!RIGHT]) (;B[af];W[ac];B[ab];W[ad] (;B[be];W[ae];B[bc];W[ad];B[ae]C[Very good!RIGHT]) (;B[ae];W[be]C[Only one eye.]) (;B[ce];W[be]C[No way to make two eyes now.])) (;B[bc];W[ad] (;B[ac];W[ae];B[be];W[af] (;B[ce];W[de]C[Only one eye.]) (;B[de];W[ce]C[Only one eye])) (;B[be];W[ae];B[ce];W[de]C[Only one eye now]))) (;B[bc];W[bb] (;B[ca];W[aa]C[No.]) (;B[ab];W[ca]C[No. There is not enough eyespace this way.]) (;B[ac]C[No way to make two eyes now. (White can tenuki)]) (;B[ce];W[be]C[No way to make two eyes without killing whites two stones.])) (;B[ab];W[bb] (;B[bc];W[ca]C[Not enough eyespace.]) (;B[ca];W[aa];B[ba];W[bc]C[No.]) (;B[ce];W[bc]C[There in not enough eyespace.]) (;B[be];W[bc]C[This is not the way.])) (;B[ce];W[bb]C[No. You have to take the corner.]) (;B[cd];W[bb]C[No. You have to take the corner.]) (;B[ac];W[bb];B[ab];W[ca]C[There is not enough eyespace.]) (;B[ad];W[bb]C[No. You have to take the corner to make two eyes.]) (;B[cg]C[];W[bb]C[Wrong. You can save the corner!]) (;B[fd];W[bb];B[ed];W[gd]C[The corner is lost.]) (;B[fb] (;W[gb] (;B[bb];W[ca]AW[dg] (;B[ac];W[ce] (;B[cd]C[Very good. The best you can do!RIGHT]) (;B[ad];W[cd]C[The corner is lost.]) (;B[be];W[cd] (;B[ae];W[bc]C[Ko. You can do better!]) (;B[bc];W[ae]C[Only one eye.])) (;B[ab];W[cd] (;B[be];W[ae]C[The corner is lost.]) (;B[ad]C[The corner is lost.])) (;B[ae];W[cd];B[be];W[bc]C[Ko. You can do better!])) (;B[ce];W[ac] (;B[be];W[de] (;B[ad];W[ab]C[The corner is lost.]) (;B[bc];W[ab]C[No way to make two eyes now.]) (;B[ab];W[bc];B[ad]C[YesRIGHT])) (;B[de];W[be];B[ad];W[ab]C[The corner is lost!]) (;B[bc];W[be];B[ad];W[ab]C[The corner is lost.]) (;B[ad];W[ab];B[be];W[de]C[The corner is lost.]) (;B[ae];W[ab] (;B[bc];W[be]C[The corner is lost.]) (;B[ad];W[be]C[The corner is lost.])) (;B[ab];W[ad] (;B[ae];W[be];B[bc];W[ad]C[No way to make two eyes now.]) (;B[bc];W[be];B[ae];W[ad]C[No way to make two eyes now.]) (;B[be];W[ae] (;B[bc];W[af];B[de]C[Yes!RIGHT]) (;B[de]C[Very Good! White cannot cut at B17.RIGHT])))) (;B[ab];W[ad] (;B[ae];W[be];B[ac]C[Yes! RIGHT]) (;B[be];W[ae];B[ac];W[af];B[ce];W[de]C[The group is dead.]) (;B[ac];W[ae];B[ce];W[be]C[B17 is false.]) (;B[bc];W[be]C[The group is dead.]) (;B[ce];W[be];B[ac];W[ae]C[B17 is false.])) (;B[ad]C[Yes. That is life!RIGHT]) (;B[ae];W[ac];B[ab];W[ad] (;B[be]C[Very good!RIGHT]) (;B[cd];W[be]C[Only one eye.];B[bc];W[ad])) (;B[be];W[ac];B[ab];W[ad];B[ae]C[Very good!RIGHT]) (;B[af];W[ac];B[ab];W[ad] (;B[be];W[ae];B[bc];W[ad];B[ae]C[Very good!RIGHT]) (;B[ae];W[be]C[Only one eye.]) (;B[ce];W[be]C[No way to make two eyes now.])) (;B[bc];W[ad] (;B[ac];W[ae];B[be];W[af] (;B[ce];W[de]C[Only one eye.]) (;B[de];W[ce]C[Only one eye])) (;B[be];W[ae];B[ce];W[de]C[Only one eye now]))) (;B[bc];W[bb] (;B[ca];W[aa]C[No.]) (;B[ab];W[ca]C[No. There is not enough eyespace this way.]) (;B[ac]C[No way to make two eyes now. (White can tenuki)]) (;B[ce];W[be]C[No way to make two eyes without killing whites two stones.])) (;B[ab];W[bb] (;B[bc];W[ca]C[Not enough eyespace.]) (;B[ca];W[aa];B[ba];W[bc]C[No.]) (;B[ce];W[bc]C[There in not enough eyespace.]) (;B[be];W[bc]C[This is not the way.])) (;B[ce];W[bb]C[No. You have to take the corner.]) (;B[cd];W[bb]C[No. You have to take the corner.]) (;B[ac];W[bb];B[ab];W[ca]C[There is not enough eyespace.]) (;B[ad];W[bb]C[No. You have to take the corner to make two eyes.]) (;B[cg]C[];W[bb]C[Wrong. You can save the corner!]) (;B[fd];W[bb];B[ed];W[gd]C[The corner is lost.]) (;B[fb] (;W[gb]) (;W[ca];B[bb]) (;W[bb];B[ga])) (;B[ga];W[bb];B[fb];W[ca]C[The corner is lost.]) (;B[ca];W[bb]C[The corner is lost.])) (;W[ca];B[bb]) (;W[bb];B[ga])) (;B[ga];W[bb];B[fb];W[ca]C[The corner is lost.]) (;B[ca];W[bb]C[The corner is lost.]))