(;SZ[9]AB[cd]AB[db]AB[dc]AB[de]AB[ef]AB[eg]AB[fd]AB[gd]AB[gh]AB[hh]AB[ea]AW[dd]AW[eb]AW[ec]AW[ed]AW[ee]AW[fe]AW[ff]AW[gf]AW[hc]AW[hf]AW[hg]LB[ea:A]C[Black has played the hane at A. What is White's strongest response? White can win by more than two points.]
(;W[ce]
(;B[df]C[CHOICE]
(;W[cc];B[bd]
(;W[bc];B[be]
(;W[cf];B[cg]
(;W[ad];B[bf]C[ White takes the upper corner comfortably and keeps sente.RIGHT];W[fg];B[fh]C[RIGHT])
(;W[bf];B[bg];W[ad];B[af]C[ White takes the upper corner comfortably and keeps sente.RIGHT];W[fg];B[fh]C[RIGHT]))
(;W[cb];B[ac]C[Oh no! White looses sente and half the corner.]))
(;W[cb]LB[bc:A]C[Wrong direction - A would have been bigger.])
(;W[be];B[bc];W[cb];B[bb];W[da];B[cf]LB[cc:3]LB[bd:4]LB[be:5]LB[ce:1]LB[df:2]C[No, white is being too greedy when playing W5 after W1, B2, W3, and B4. This is enough for white to win on the 9x9 board, but you should have seen a better move.]))
(;W[bd];B[cc];W[bc];B[be];W[cf];B[bf];W[cg];B[bb];W[bg];B[ad];W[af];B[ac]
(;W[eh];B[fg];W[fh];B[gg];W[dh]C[ Though Black lives in the upper left corner, white takes the entire lower edge.RIGHT])
(;W[dh];B[eh]C[No! White will barely have a chance to kill the lower group.])))
(;B[bd]C[CHOICE]
(;W[df];B[be]C[ Black is cut in two and barely lives with either group.RIGHT];W[bf]C[RIGHT])
(;W[be];B[df];W[cc];B[bc];W[cb];B[bb];W[da];B[cf]LB[be:A]C[No, white is being too greedy when palying A. Black can minimize her loss. This is enough for white to win on the 9x9 board, but you should have seen a better move.])
(;W[cc];B[df]LB[de:A]C[Ok, I know this ends in a variation which I called 'solved' elsewhere. But here: why didn't you seize the opportunity to cut black to pieces by capturing A?]
(;W[bc];B[be]
(;W[cf];B[cg]
(;W[ad];B[bf]C[White takes the upper corner comfortably and keeps sente.RIGHT];W[fg];B[fh]C[RIGHT])
(;W[bf];B[bg];W[ad];B[af]C[White takes the upper corner comfortably and keeps sente.RIGHT];W[fg];B[fh]C[RIGHT]))
(;W[cb];B[ac]C[Oh no! White looses sente and half the corner.]))
(;W[cb]LB[bc:A]C[Wrong direction - A would have been bigger.])
(;W[be];B[bc];W[cb];B[bb];W[da];B[cf]LB[cc:3]LB[bd:4]LB[be:5]LB[ce:1]LB[df:2]C[No, white is being too greedy when playing W5 after W1, B2, W3, and B4. This is enough for white to win on the 9x9 board, but you should have seen a better move.])))
(;B[fb]C[no choice];W[fc];B[gb];W[gc];B[hb];W[fa];B[ga];W[ib]LB[ea:A]C[As you can see, black's hane at A does not even threaten to make an eye in the corner.]))
(;W[cc];B[bc]
(;W[ce]C[ White either kills the upper left corner or cuts black in two.RIGHT])
(;W[cb];B[bb];W[da];B[ce]C[To cut was the right idea, but black can minimize the loss. On a 9x9 board this might be just about enough for white, but on a bigger board black could exploit her thickness. You should have seen a better move.]))
(;W[fa];B[ce]C[No. Black wins comfortably]
(;W[da];B[cb];W[ca];B[ba];W[ea];B[bb];W[fg];B[fh];W[ih];B[hi]C[No. Black wins comfortably])
(;W[cc];B[cb];W[bc];B[bb];W[bd];B[be];W[ab];B[ad];W[da];B[ih];W[fg];B[fh]C[No. Black wins comfortably])))