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Problem 13302
Created 2009-12-18
Source Problem 13299
Rating
Difficulty 9 dan
Average Solve Time 91 secs
User Attempts
13 / 190
Solve Ratio Rating 5 dan
rating history
In problem 13299 Black did right by just holding on to the corner. Here however Black tries to exploit White's apparent weaknesses. Reduce the damage and get a good result.
### WARNING ### Extremely complicated. Many variations have been covered, but there may still be omissions and even errors. Comments are welcome.
(;AB[pd]AB[qg]AB[qh]AB[qi]AB[qj]AW[oe]AW[of]AW[oi]AW[nj]AW[nk]AB[nf]AB[lh]AB[li]AB[lj]AB[mj]AB[mk]AB[ml]AB[ol]AB[ok]AW[kc]AW[lc]AW[mc]AW[nc]AW[ob]AW[od]AW[pf]AW[ph]AW[ni]AW[ng]AW[mh]AW[oh]AB[pc]AB[qf]AB[mf]AB[ne]AB[md]AB[le]AB[lg]AB[oj]AB[pj]AB[nl]AB[rj]C[Black prefers to attack before connecting R18 hoping to get a better result than in problem 13299. Should you defend or just lose some stones and cut back?]AB[pb]AW[pa]AB[qa]AW[oa]AB[pg]MA[pg]AP[goproblems]
(;W[og];B[oc]C[Black is not satisfied yet. So the question remains: defend or attack? And where?]
(;W[qb]
(;B[nd]
(;W[qe];B[rc]
(;W[re];B[nb]
(;W[ra];B[qc]
(;W[mb];B[rb]
(;W[qa];B[pe]
(;W[sb];B[rf]
(;W[se];B[sc])
(;W[sf];B[sd]
(;W[se];B[sg])
(;W[rd];B[sg])
(;W[sg];B[se]))
(;W[sd];B[sc])
(;W[sc];B[sd]
(;W[se];B[sa];W[sb];B[rd])
(;W[rd];B[sa];W[sb];B[se]))
(;W[rd];B[sc]
(;W[sd];B[sa])
(;W[qd];B[sa]))
(;W[qd];B[se]))
(;W[rd];B[rf]
(;W[sd]
(;B[sc];W[na];B[sf];W[sb];B[sa])
(;B[sb]
(;W[sf];B[sg])
(;W[na];B[sf];W[sa];B[se])))
(;W[se];B[sc];W[na];B[sf])
(;W[sc];B[sb])
(;W[sb];B[sc]
(;W[sd];B[sa])
(;W[qd];B[sa])))
(;W[rf];B[mg])
(;W[na];B[mg]))
(;W[na];B[qa])
(;W[pe];B[qa]))
(;W[pe];B[na])
(;W[qa]
(;B[pe])
(;B[rb];W[mb];B[pe]
(;W[sb];B[rf]
(;W[se];B[sc])
(;W[sf];B[sd]
(;W[se];B[sg])
(;W[rd];B[sg])
(;W[sg];B[se]))
(;W[sd];B[sc])
(;W[sc];B[sd]
(;W[se];B[sa];W[sb];B[rd])
(;W[rd];B[sa];W[sb];B[se]))
(;W[rd];B[sc]
(;W[sd];B[sa])
(;W[qd];B[sa]))
(;W[qd];B[se]))
(;W[rd];B[rf]
(;W[sd]
(;B[sc];W[na];B[sf];W[sb];B[sa])
(;B[sb]
(;W[sf];B[sg])
(;W[na];B[sf];W[sa];B[se])))
(;W[se];B[sc];W[na];B[sf])
(;W[sc];B[sb])
(;W[sb]))
(;W[rf];B[mg])
(;W[na];B[mg])))
(;W[rb];B[na]
(;W[sc];B[sd]
(;W[rd];B[sb])
(;W[sb];B[rd]
(;W[mb];B[qa];W[pa];B[ob]
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[pe])
(;W[rf];B[pe])
(;W[ma];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf]))
(;W[sf];B[pe])
(;W[qd];B[pe]))
(;W[pe];B[qa];W[pa];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[qa];W[pa];B[pe]))
(;W[pe];B[sb]
(;W[mb];B[qa];W[pa];B[ob])
(;W[ma];B[qa];W[pa];B[ob])
(;W[se];B[qa];W[pa];B[ob]))
(;W[mb];B[qa]
(;W[pa];B[sb]
(;W[ob];B[oa];W[ma];B[ob];W[rd];B[sc]
(;W[se];B[sa])
(;W[pe];B[sa])
(;W[qa];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf])))
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[ob]))
(;W[rd];B[sb];W[pa];B[ob])))
(;W[mb];B[qa];W[pa];B[ob]
(;W[sc];B[sd];W[sb];B[rd]
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[pe])
(;W[rf];B[pe])
(;W[ma];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf]))
(;W[sf];B[pe])
(;W[qd];B[pe]))
(;W[sb];B[sd]
(;W[se];B[pe])
(;W[pe];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf])
(;W[rd];B[sc]
(;W[sf];B[rf])
(;W[rf];B[sf])))
(;W[rd];B[sc]
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[pe]))))))
(;W[rb]
(;B[qc];W[ra];B[na]
(;W[sc];B[sd]
(;W[rd];B[sb])
(;W[sb];B[rd]
(;W[mb];B[qa];W[pa];B[ob]
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[pe])
(;W[rf];B[pe])
(;W[ma];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf]))
(;W[sf];B[pe])
(;W[qd];B[pe]))
(;W[pe];B[qa];W[pa];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[qa];W[pa];B[pe]))
(;W[pe];B[sb]
(;W[mb];B[qa];W[pa];B[ob])
(;W[ma];B[qa];W[pa];B[ob])
(;W[se];B[qa];W[pa];B[ob]))
(;W[mb];B[qa]
(;W[pa];B[sb]
(;W[ob];B[oa];W[ma];B[ob];W[rd];B[sc]
(;W[se];B[sa])
(;W[pe];B[sa])
(;W[qa];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf])))
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[ob]))
(;W[rd];B[sb];W[pa];B[ob])))
(;W[mb];B[qa];W[pa];B[ob]
(;W[sc];B[sd];W[sb];B[rd])
(;W[sb];B[sd]
(;W[se];B[pe])
(;W[pe];B[se]
(;W[rf];B[sf])
(;W[sf];B[rf])
(;W[rd];B[sc]))
(;W[rd];B[sc]
(;W[pe];B[se]
(;W[sf];B[rf])
(;W[rf];B[sf]))
(;W[se];B[pe])))))
(;B[rd]
(;W[ra];B[na]
(;W[qa];B[qc]
(;W[mb]
(;B[sb];W[ma];B[pe];W[sd];B[rf])
(;B[pe]
(;W[sc];B[sd];W[se];B[sb];W[ma];B[rf];W[sa];B[sf])
(;W[se];B[rf])
(;W[sd];B[sc]
(;W[rf];B[rg])
(;W[se];B[rf]))
(;W[sb];B[rf])))
(;W[pe];B[sb]))
(;W[pe];B[qa]
(;W[pa]
(;B[qc])
(;B[sb]))
(;W[sb];B[qc])
(;W[sd];B[pa]))
(;W[qc];B[qd]))
(;W[pe];B[na])
(;W[qd];B[qc])
(;W[qc];B[qd])
(;W[sb];B[na])))
(;W[qc];B[qd]
(;W[ra];B[rd]
(;W[pe];B[na])
(;W[rb];B[na])
(;W[qa];B[pe])
(;W[mb];B[pe])
(;W[sd];B[sc]
(;W[mb];B[pe])
(;W[pe];B[se];W[sf];B[na])))
(;W[rb];B[na]
(;W[rd];B[ra];W[sc];B[pe];W[sb];B[mg];W[sa];B[pi];W[pa];B[ob];W[mb];B[mi])
(;W[sc];B[rd];W[sd];B[pe])
(;W[pe];B[rd])
(;W[sd];B[sb])
(;W[ra];B[rd]))
(;W[rd];B[rb])
(;W[mb];B[rb])
(;W[pe];B[rb]))
(;W[qd];B[qc]
(;W[ra];B[na])
(;W[rb];B[na])
(;W[pe];B[na]))
(;W[pe];B[na])
(;W[mb];B[na]))
(;W[qc];B[qd]
(;W[rd];B[rb])
(;W[rb];B[re]))
(;W[qd];B[qc]
(;W[pe];B[rb])
(;W[ra];B[pe])
(;W[nb];B[pe])
(;W[rd];B[rb]))
(;W[rd]
(;B[qc];W[ra])
(;B[nb]
(;W[qc];B[na]
(;W[pe];B[rb];W[qd];B[sc])
(;W[qd];B[rb]
(;W[pe];B[sc])
(;W[sc];B[pe];W[sb];B[ra];W[sd];B[se])))
(;W[ra];B[qc];W[sc];B[sb];W[rb];B[sd];W[se];B[sc];W[pe];B[na])))
(;W[pe];B[qc])
(;W[ra];B[re])
(;W[rb];B[re])
(;W[nb];B[re]))
(;W[ra];B[rc]
(;W[qd];B[qc])
(;W[qc];B[qd])
(;W[qe];B[re])
(;W[pe];B[qe])
(;W[rd];B[qd]
(;W[qe];B[re])
(;W[qc];B[re]))
(;W[re];B[qe]))
(;W[pe];B[qc]
(;W[qe];B[rb])
(;W[rb];B[qe])
(;W[rc];B[qd]
(;W[qe];B[rd];W[re];B[rb])
(;W[rd];B[qe]))
(;W[ra];B[qe])
(;W[qd];B[rc]
(;W[qe];B[rb])
(;W[ra];B[qe])
(;W[rb];B[nb])
(;W[rd];B[rb]))
(;W[rd];B[rb]
(;W[rc];B[nb])
(;W[qd];B[rc])
(;W[qe];B[rc]))
(;W[re];B[qe]))
(;W[qc];B[qe])
(;W[qd];B[qc]
(;W[qe];B[rb]
(;W[rc];B[rd])
(;W[pe];B[rd])
(;W[rd];B[rc])
(;W[rf];B[rd]))
(;W[pe];B[rc]
(;W[qe])
(;W[ra];B[qe])
(;W[rb];B[nb])
(;W[rd];B[rb]))
(;W[rc];B[rb];W[pe]C[RIGHT])
(;W[rb];B[qe])
(;W[rd];B[rb]
(;W[rc];B[nb])
(;W[pe];B[rc]))))
(;B[qc]C[CHOICE]
(;W[ra]
(;B[nd]C[Black goes all out! Can White still save that group?CHOICE]
(;W[qe]
(;B[re]
(;W[rd]
(;B[rc]C[CHOICE]
(;W[sc];B[qd]
(;W[rb];B[sd];W[pe];B[sb])
(;W[pe];B[sd];W[sb];B[rf]))
(;W[rf]
(;B[pe]C[CHOICE];W[se]
(;B[sc]C[CHOICE]
(;W[sb])
(;W[rb]C[Black's attack ultimately turns out to be an overplay. Well done.RIGHT])
(;W[re];B[mg]MA[mh]MA[ng]MA[of]MA[oe]MA[od]MA[pf]MA[og]MA[oh]MA[ph]MA[oi]MA[ni]MA[nj]MA[nk])
(;W[qd];B[sd])
(;W[sd];B[qd]C[A very risky ko for White.]))
(;B[qd];W[re]
(;B[rb];W[qa]C[RIGHT])
(;B[sc]
(;W[sb]C[RIGHT])
(;W[rb]C[RIGHT]))
(;B[sb];W[rb]C[RIGHT]))
(;B[rb];W[qa];B[sb];W[sd];B[qd];W[re];B[rg];W[sa]C[RIGHT])
(;B[sb]
(;W[rb]
(;B[sd];W[qa];B[sg];W[sa];B[sf];W[sc]C[RIGHT])
(;B[sc];W[sd]C[RIGHT]))
(;W[sd];B[qd];W[re];B[rg];W[rb]C[RIGHT])))
(;B[rb];W[qa]C[];B[qd];W[se];B[pe];W[re]C[RIGHT]))
(;W[qd];B[pe])
(;W[pe];B[qd])
(;W[rb];B[qd]))
(;B[qd];W[rc]C[RIGHT])
(;B[pe];W[rc]C[RIGHT])
(;B[rb];W[qa];B[rc];W[rf]C[RIGHT];B[qd];W[se];B[pe];W[re]C[RIGHT]))
(;W[rc];B[rd])
(;W[qd];B[rd];W[pe];B[rc])
(;W[pe];B[rd]))
(;B[pe];W[rc]C[RIGHT])
(;B[rd]
(;W[re]
(;B[pe];W[rc]C[RIGHT])
(;B[qd];W[pe]C[RIGHT])
(;B[rb];W[qa];B[pe]
(;W[rc];B[sc];W[qd];B[rc];W[sb];B[sa];W[se];B[nb];W[sb])
(;W[sb]
(;B[sc];W[qd]C[RIGHT])
(;B[rc];W[sd]C[RIGHT])
(;B[sd];W[rc]C[RIGHT]))
(;W[qd];B[rc])
(;W[sd]
(;B[sc];W[qd]C[RIGHT])
(;B[rc];W[sb]C[RIGHT])
(;B[rf];W[sb]C[RIGHT]))
(;W[sc];B[rc];W[sb];B[sd];W[se];B[sa];W[sb];B[rf])))
(;W[rc];B[re])
(;W[pe];B[re])
(;W[qd];B[re];W[pe];B[rc]))
(;B[rb];W[qa];B[re];W[rd];B[rc];W[rf]C[RIGHT])
(;B[rc];W[rd]C[RIGHT])
(;B[qd]
(;W[re]C[RIGHT])
(;W[rc]
(;B[re];W[rd]C[RIGHT])
(;B[rd];W[re]C[RIGHT]))))
(;W[rc];B[qe]MA[od]MA[oe]MA[of]MA[pf]MA[og]MA[ng]MA[mh]MA[ni]MA[nj]MA[nk]MA[oi]MA[oh]MA[ph]C[The corner just aint THAT big...!])
(;W[rd];B[qe])
(;W[pe];B[qe])
(;W[qd];B[qe]))
(;B[qe];W[nd]C[RIGHT])
(;B[rb];W[qa];B[nd];W[qe];B[re];W[rd]))
(;W[qe];B[rb]
(;W[rd];B[rc]
(;W[pe];B[nd])
(;W[nd];B[pe]))
(;W[nd];B[pe])
(;W[pe];B[nd])
(;W[rc];B[rd]MA[pe]MA[nd]))
(;W[rb];B[rc]
(;W[ra];B[nd]
(;W[qe];B[re]
(;W[rd];B[qd])
(;W[pe];B[rd])
(;W[qd];B[rd])
(;W[sc];B[rd]))
(;W[pe];B[qe]))
(;W[nd];B[nb]
(;W[qe];B[re];W[rd];B[qd])
(;W[ra];B[na])
(;W[mb];B[na])
(;W[sc];B[na])
(;W[pe];B[qe]))
(;W[qe];B[nd]
(;W[pe];B[nb];W[ra];B[na];W[sc];B[rd];W[re];B[sd])
(;W[re];B[nb];W[ra])
(;W[nb];B[re]MA[od]MA[oe]MA[of]MA[pf]MA[og]MA[ng]MA[mh]MA[ni]MA[nj]MA[nk]MA[oi]MA[oh]MA[ph]MA[qe])))
(;W[nd]
(;B[rb])
(;B[nb]
(;W[ra];B[na]
(;W[qe];B[rc]
(;W[pe];B[re])
(;W[re];B[pe])
(;W[qa];B[rb])
(;W[mb];B[qa]))
(;W[qa])
(;W[pe];B[rc]
(;W[qe];B[re])
(;W[re];B[qe])
(;W[qa];B[rb])
(;W[mb];B[qa])
(;W[rd];B[qe])))
(;W[rb];B[na])
(;W[qe]
(;B[rb];W[pe];B[re];W[rd])
(;B[re];W[ra]
(;B[na];W[rc];B[rd])
(;B[rb];W[rc]
(;B[qa])
(;B[na];W[sb];B[qa]))
(;B[rc]))
(;B[na]))
(;W[pe];B[na])
(;W[rc];B[na])))
(;W[nb];B[nd]))
(;B[nb];W[ra];B[na]
(;W[qa]
(;B[qc];W[rc];B[qe];W[nd]C[RIGHT])
(;B[nd]
(;W[qd]C[RIGHT])
(;W[mb];B[pe])
(;W[qe]C[RIGHT])))
(;W[qd];B[qa])
(;W[qe];B[qa]))
(;B[qe];W[nd];B[nb];W[ra];B[qc]
(;W[mb]C[RIGHT])
(;W[rc];B[na]
(;W[qa]C[RIGHT])
(;W[rd];B[qa];W[pa];B[sb])
(;W[pe];B[qa];W[pa];B[sb])
(;W[mb];B[qa])
(;W[ma];B[qa])
(;W[qd];B[qa]))
(;W[ma]C[RIGHT])
(;W[na]C[RIGHT])
(;W[rb];B[rc]
(;W[mb]C[RIGHT])
(;W[na]C[RIGHT])
(;W[ma]C[RIGHT])
(;W[qa]C[RIGHT])
(;W[sb];B[na])
(;W[sc];B[na]))
(;W[qa]C[RIGHT]))
(;B[pe];W[nd];B[nb];W[ra];B[na];W[qa]C[RIGHT]))
(;W[nd];B[nb]C[Black gets the corner with a bonus.]MA[ob]MA[oa]MA[pa])
(;W[nb];B[nd]C[Cut off, can White still save that group?]
(;W[qd];B[qe]MA[od]MA[oe]MA[of]MA[pf]MA[og]MA[ng]MA[oh]MA[ph]MA[oi]MA[ni]MA[nj]MA[nk]MA[mh]C[Whoops.])
(;W[qe];B[qd]
(;W[re];B[rd]
(;W[pe];B[rb]MA[nh]C[One eye won't help White.])
(;W[qb];B[pe])
(;W[rf];B[pe]))
(;W[pe];B[re]MA[od]MA[oe]MA[pe]MA[qe]MA[of]MA[pf]MA[og]MA[ng]MA[mh]MA[ni]MA[nj]MA[nk]MA[oi]MA[oh]MA[ph]C[Whoa!])
(;W[qb];B[re])
(;W[rd];B[re]
(;W[qb];B[rc])
(;W[pe];B[rc])))
(;W[pe];B[qe]MA[od]MA[oe]MA[pe]MA[pf]MA[of]MA[og]MA[oh]MA[ph]MA[ni]MA[oi]MA[ng]MA[mh]MA[nj]MA[nk]C[Aargh...])
(;W[qb];B[qe]MA[od]MA[oe]MA[of]MA[ng]MA[og]MA[pf]MA[oh]MA[ph]MA[oi]MA[ni]MA[nj]MA[nk]MA[mh]C[Ouch!]))
(;W[qe];B[qd]
(;W[re];B[rd]
(;W[pe];B[nb]C[Black gets the corner])
(;W[nd];B[pe])
(;W[nb];B[nd]
(;W[pe];B[rb]MA[nh]C[One eye won't help White.])
(;W[qb];B[pe])
(;W[rf];B[pe])))
(;W[nd];B[pe])
(;W[pe];B[re]))
(;W[qd];B[qe];W[pe];B[qc])
(;W[qc];B[qe]
(;W[nd];B[nb])
(;W[qd];B[pe]
(;W[nd];B[nb])
(;W[nb];B[nd])
(;W[qb];B[nd]))
(;W[pe];B[qd];W[nd];B[nb])
(;W[qb];B[nd])
(;W[nb];B[nd]))
(;W[pe];B[qe];W[nd];B[nb]))
(;W[qb];B[og]MA[pd]MA[pc]MA[pb]MA[mh]MA[ng]MA[oh]MA[ph]MA[oi]MA[ni]MA[nj]MA[nk]C[Black cuts off part of your group gaining some 20 points. You need compensation in the corner, so capturing all the marked Black stones should be your goal now.]MA[qa]
(;W[qe];B[re]
(;W[qd];B[qc]
(;W[rd];B[rc]
(;W[pe];B[rb])
(;W[oc];B[pe])
(;W[sc];B[pe])
(;W[rb];B[pe]))
(;W[rc];B[rd]
(;W[pe];B[rb])
(;W[rb];B[pe]))
(;W[pe];B[rd])
(;W[oc];B[rd])
(;W[rb];B[pe])
(;W[ra];B[rc]))
(;W[qc];B[qd]
(;W[rd];B[rc])
(;W[pe];B[rd])
(;W[oc];B[rc]))
(;W[pe];B[rc];W[qd];B[qc];W[rd];B[rb])
(;W[rc];B[rd];W[qd];B[qc]
(;W[pe];B[rb])
(;W[rb];B[pe]))
(;W[rd];B[rc]
(;W[qc];B[qd])
(;W[qd];B[qc]
(;W[pe];B[rb])
(;W[oc];B[pe])
(;W[sc];B[pe])
(;W[rb];B[pe]))
(;W[pe];B[qd])
(;W[rb];B[qd]))
(;W[ra];B[rc])
(;W[rb];B[rc]))
(;W[qd];B[qe];W[pe];B[qc])
(;W[qc];B[qd]
(;W[rd];B[re]C[The exchange is even slightly better for Black, so this can't be right.]MA[nk]MA[nj]MA[oi]MA[oh]MA[ph]MA[ni]MA[mh]MA[ng]MA[mg]MA[nh]MA[mi]MA[pi]MA[rc]MA[rd]MA[sd]MA[sc]MA[sb]MA[sa]MA[ra]MA[qa]MA[qb]MA[qc]MA[rb])
(;W[qe]
(;B[rc])
(;B[rd]
(;W[pe];B[oc]
(;W[nd];B[nb];W[ra];B[na];W[qa];B[rc];W[mb];B[rb];W[ma];B[re])
(;W[re];B[rc]
(;W[nd]
(;B[rb])
(;B[nb]
(;W[ra];B[na]
(;W[sd];B[rb])
(;W[qa];B[rb]))
(;W[rb];B[na])
(;W[mb];B[na])
(;W[sd];B[rb])))
(;W[rb];B[nb]
(;W[sc];B[na]
(;W[sd];B[nd])
(;W[nd];B[sd]))
(;W[sd];B[na]
(;W[sc];B[nd])
(;W[nd];B[sc]))
(;W[nd];B[na])
(;W[ra];B[na]
(;W[sd];B[qa]
(;W[sc];B[nd])
(;W[pa];B[sc])
(;W[nd];B[sc]))
(;W[sc];B[qa]
(;W[sd];B[nd])
(;W[nd];B[sd])
(;W[pa];B[sb]))))
(;W[ra];B[nd])))
(;W[rc];B[ra])
(;W[oc];B[pe]))))
(;W[ra];B[rc])
(;W[rb];B[rd])
(;W[oc];B[rc])
(;W[rc];B[rd]
(;W[qe];B[re];W[qd];B[qc])
(;W[qd];B[qc]
(;W[rb];B[qe])
(;W[ra];B[qe])
(;W[qe];B[re]
(;W[pe];B[rb])
(;W[rb];B[pe])))
(;W[pe];B[qd])
(;W[oc];B[pe])
(;W[qc];B[qd])
(;W[ra];B[qd])
(;W[rb];B[qd])
(;W[re];B[sd]
(;W[qd];B[qc]
(;W[qe];B[rb])
(;W[pe];B[rb])
(;W[ra];B[qe])
(;W[rb];B[qe])
(;W[oc];B[rb]))
(;W[qc];B[qd]
(;W[qe];B[oc]
(;W[nb];B[nd];W[pe];B[rf])
(;W[nd]
(;B[nb];W[ra])
(;B[ra]
(;W[rb];B[nb]
(;W[sa];B[qa];W[ra];B[na]
(;W[qa];B[sc])
(;W[pe];B[sc]
(;W[mb];B[qa];W[pa];B[sb])
(;W[se];B[qa];W[pa];B[ob]MA[sb]))
(;W[sc];B[qa];W[pa];B[se])
(;W[se];B[sc];W[pe];B[qa];W[pa];B[ob]MA[sb])
(;W[rf];B[sc])
(;W[mb];B[qa]
(;W[pa];B[sc])
(;W[pe];B[sc];W[pa];B[sb])))
(;W[mb];B[na])
(;W[sb];B[na])
(;W[pe];B[na])
(;W[se];B[na]))
(;W[sb];B[nb])
(;W[sc];B[nb])
(;W[nb];B[rb])
(;W[pe];B[nb])
(;W[se];B[nb])))
(;W[pe];B[ra]
(;W[nb];B[rb])
(;W[rb];B[nb]
(;W[sa];B[qa]
(;W[ra];B[na]
(;W[qa];B[sc])
(;W[se];B[qa]
(;W[pa];B[ob]
(;W[nd];B[sc])
(;W[sc];B[nd]))
(;W[nd];B[pa]))
(;W[nd];B[sc]
(;W[mb];B[qa];W[pa];B[sb])
(;W[se];B[qa];W[pa];B[ob]MA[sb]))
(;W[sc];B[qa];W[pa];B[ob]
(;W[nd];B[se])
(;W[se];B[nd])))
(;W[se];B[na]
(;W[sc];B[nd])
(;W[nd];B[sc])
(;W[ra];B[pa]))
(;W[sc];B[na]
(;W[nd];B[pa])
(;W[pa];B[nd])
(;W[se];B[nd]))
(;W[nd];B[na]))
(;W[se];B[na])
(;W[mb];B[na])
(;W[nd];B[na]))
(;W[sb];B[nb])
(;W[nd];B[nb])))
(;W[pe];B[oc];W[qe];B[ra]
(;W[nb];B[rb])
(;W[rb];B[nb]
(;W[sa];B[qa]
(;W[ra];B[na]
(;W[qa];B[sc])
(;W[se];B[qa]
(;W[pa];B[ob]
(;W[nd];B[sc])
(;W[sc];B[nd]))
(;W[nd];B[pa]))
(;W[nd])
(;W[sc];B[qa];W[pa];B[ob]
(;W[nd];B[se])
(;W[se])))
(;W[se];B[na]
(;W[sc];B[nd])
(;W[nd];B[sc])
(;W[ra];B[pa]))
(;W[sc];B[na]
(;W[nd];B[pa])
(;W[pa];B[nd])
(;W[se]))
(;W[nd];B[na]))
(;W[se];B[na])
(;W[mb];B[na])
(;W[nd]))
(;W[sb];B[nb])
(;W[nd]))
(;W[oc];B[sc];W[ra];B[qe]))
(;W[qe];B[qd]
(;W[pe];B[ra]
(;W[oc];B[rb])
(;W[rb];B[oc]
(;W[sa];B[nd])
(;W[nd];B[nb]
(;W[sa];B[qa];W[ra];B[na];W[sc];B[qa]
(;W[pa];B[se])
(;W[se];B[pa])
(;W[mb];B[pa]))
(;W[mb];B[na])
(;W[se];B[na]))
(;W[nb];B[nd]))
(;W[se];B[rb])
(;W[sc];B[rb])
(;W[sb];B[oc]
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[qc];B[rb]))
(;W[oc];B[pe])
(;W[ra];B[oc]
(;W[nd];B[pe])
(;W[pe];B[nd]))
(;W[se];B[ra]
(;W[pe];B[rb])
(;W[oc];B[rb])
(;W[rb];B[pe]
(;W[oc];B[rf])
(;W[sc];B[rf]))))
(;W[pe];B[qe])
(;W[oc];B[pe]))))
(;W[oc];B[og]
(;W[qe];B[re]
(;W[qc];B[qd]
(;W[rd];B[qb])
(;W[pe];B[qb])
(;W[qb];B[rc]))
(;W[qd];B[rb]
(;W[rc];B[rd]
(;W[qc];B[sc];W[pe];B[qb])
(;W[pe];B[sc];W[qc];B[qb])
(;W[qb];B[qc]))
(;W[qc];B[rc]
(;W[qb];B[ra])
(;W[rd];B[sd];W[pe];B[qb])
(;W[pe];B[qb]))
(;W[rd];B[rc]
(;W[qc];B[sd];W[pe];B[qb])
(;W[rf];B[pe]
(;W[qc];B[qb];W[se];B[sc]
(;W[sa];B[sd])
(;W[sd];B[sg])
(;W[rg];B[sd];W[re];B[sg];W[rh];B[sh];W[si];B[ri];W[sf];B[sh]))
(;W[sd];B[qc])
(;W[se];B[qc]))
(;W[pe];B[sd]))
(;W[pe];B[rd]
(;W[rc];B[sc];W[qc])
(;W[qc];B[qb];W[rc];B[sc]))
(;W[rf];B[rd]))
(;W[rb];B[rc])
(;W[qb];B[rc]))
(;W[qb];B[rc])
(;W[qd];B[qe];W[pe];B[qc])
(;W[pe];B[qe]
(;W[qb];B[rc])
(;W[qc];B[qb])
(;W[qd];B[qc])))
(;W[qe]C[]
(;B[qb]C[Black can avoid complications and get a reasonable result like this.]
(;W[pe];B[oc]
(;W[nd];B[qd]
(;W[re];B[og])
(;W[og];B[re])
(;W[rd];B[rc]
(;W[re];B[og])
(;W[og];B[re])
(;W[rf];B[og])
(;W[sd];B[sc]
(;W[rf];B[og])
(;W[re];B[og])
(;W[og];B[re]))))
(;W[nb];B[nd]
(;W[og];B[qd])
(;W[qd];B[rc]
(;W[qc];B[rb]
(;W[rd];B[og])
(;W[sd];B[og])
(;W[og];B[se]
(;W[rd];B[sd]
(;W[rf];B[sc];W[sa];B[re])
(;W[sf];B[rf])
(;W[re];B[rf])
(;W[sc];B[rf]))
(;W[sd];B[rd]
(;W[sf];B[re])
(;W[re];B[sf]))
(;W[re];B[sd])
(;W[sf];B[sd]
(;W[re];B[rf])
(;W[rf];B[re])
(;W[rd];B[rf]))
(;W[rf];B[sd]
(;W[re];B[sf])
(;W[sf];B[re])
(;W[rd];B[sc];W[sa];B[re])))
(;W[re];B[og])
(;W[se];B[og])
(;W[rf];B[og]))
(;W[og];B[se]
(;W[sd];B[rd];W[re];B[sf])
(;W[re];B[sd])
(;W[rf];B[sd]
(;W[re];B[sf])
(;W[sf];B[sb]
(;W[rd];B[ra])
(;W[ra];B[rd])
(;W[qc];B[rd])
(;W[re];B[rd]))
(;W[sb];B[sf]))
(;W[rd];B[sd]
(;W[sf];B[rf])
(;W[rf];B[sf])
(;W[re];B[rf])
(;W[qc];B[rb]
(;W[rf];B[sc];W[sa];B[re])
(;W[sf];B[rf])
(;W[re];B[rf])
(;W[sc];B[rf]))
(;W[sb];B[sc]))
(;W[qc];B[rb]
(;W[rd];B[sd]
(;W[rf];B[sc];W[sa];B[re])
(;W[sf];B[rf])
(;W[re];B[rf])
(;W[sc];B[rf]))
(;W[sd];B[rd]
(;W[sf];B[re])
(;W[re];B[sf]))
(;W[re];B[sd])
(;W[sf];B[sd]
(;W[re];B[rf])
(;W[rf];B[re])
(;W[rd]))
(;W[rf];B[sd]
(;W[re];B[sf])
(;W[sf])
(;W[rd]))))
(;W[rd];B[og]))
(;W[re];B[rc]
(;W[og];B[qd])
(;W[qd];B[og])
(;W[rd];B[qd]))
(;W[rd];B[rc]
(;W[qd];B[og])
(;W[og];B[qd])))
(;W[og]
(;B[qd]
(;W[nd];B[re])
(;W[rd];B[rc]
(;W[nd];B[re])
(;W[re];B[nd]))
(;W[re];B[rd];W[nd];B[rf];W[rc];B[sb];W[sd];B[rb]
(;W[sc];B[nb])
(;W[nb];B[sc])))
(;B[nd]
(;W[nb];B[qd])
(;W[qd];B[rc]
(;W[nb];B[se]
(;W[sd];B[rd];W[re];B[sf])
(;W[re];B[sd])
(;W[rf];B[sd]
(;W[re];B[sf])
(;W[sf];B[sb]
(;W[rd];B[ra])
(;W[ra];B[rd])
(;W[qc];B[rd])
(;W[re];B[rd]))
(;W[sb];B[sf]))
(;W[rd];B[sd]
(;W[sf];B[rf])
(;W[rf];B[sf])
(;W[re];B[rf])
(;W[qc];B[rb])
(;W[sb];B[sc]))
(;W[qc];B[rb]))
(;W[rd]
(;B[sb]
(;W[ra];B[nb])
(;W[rf];B[sg]
(;W[sf];B[sd]
(;W[ra];B[nb]
(;W[se];B[sc]
(;W[qc];B[na])
(;W[rb];B[na])
(;W[mb];B[na]))
(;W[qc];B[na]))
(;W[nb];B[ra]))
(;W[ra];B[nb])
(;W[nb];B[ra])
(;W[sd];B[sf];W[qc];B[nb];W[rb];B[ra];W[sc];B[na];W[rb];B[oa];W[sa]C[A very big ko where Black risks little.])
(;W[qc]
(;B[sf])
(;B[nb];W[ra];B[na];W[sd];B[sf];W[rb];B[sa];W[rb];B[ra];W[sc];B[oa]))))
(;B[qc]))))))
(;W[oc];B[pe]
(;W[re];B[rc]C[White can only connect, but then Black has sente.]MA[og])
(;W[og]C[White saves all but Black secures the corner in sente.])
(;W[rd];B[qd];W[re];B[rc]MA[og]C[White still needs to connect so Black has sente.]))
(;W[og]
(;B[re];W[pe];B[qd];W[oc])
(;B[pe]))
(;W[re]
(;B[pe];W[rc];B[rb])
(;B[rc]
(;W[pe];B[og])
(;W[og];B[pe]))))
(;B[og]C[Black cuts of some 20 points worth, can you compensate that?CHOICE]MA[ng]MA[mh]MA[ni]MA[nj]MA[nk]MA[oi]MA[oh]MA[ph]
(;W[qb];B[re]
(;W[qd];B[qc]
(;W[rd];B[rc]
(;W[pe];B[rb])
(;W[oc];B[pe])
(;W[sc];B[pe])
(;W[rb];B[pe]))
(;W[rc];B[rd]
(;W[pe];B[rb])
(;W[rb];B[pe]))
(;W[pe];B[rd])
(;W[oc];B[rd])
(;W[rb];B[pe])
(;W[ra];B[rc]))
(;W[qc];B[qd]
(;W[rd];B[rc])
(;W[pe];B[rd])
(;W[oc];B[rc]))
(;W[pe];B[rc];W[qd];B[qc];W[rd])
(;W[rc];B[rd];W[qd];B[qc])
(;W[rd];B[rc]
(;W[qc];B[qd])
(;W[qd];B[qc])
(;W[pe];B[qd])
(;W[rb];B[qd]))
(;W[ra];B[rc])
(;W[rb];B[rc]))
(;W[re];B[pe]
(;W[oc])
(;W[qb]
(;B[rb];W[qc];B[qd];W[rc];B[rd];W[ra];B[se])
(;B[qc]
(;W[ra];B[rc]
(;W[rb];B[sd])
(;W[rf];B[rg]))
(;W[rb];B[rc]
(;W[oc];B[sb];W[ra];B[sd]
(;W[se];B[rf])
(;W[rd];B[rf]))
(;W[sc];B[sd]
(;W[se];B[sb];W[ra];B[rf])
(;W[sb];B[ra])
(;W[rd];B[sb];W[ra];B[rf])
(;W[oc];B[sb];W[ra];B[rf]))
(;W[ra];B[sd])
(;W[sb];B[ra];W[sa];B[qa];W[ra];B[sc];W[qa];B[oc]
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[sd];B[sb]
(;W[ra];B[rd]
(;W[se];B[sc]
(;W[oc];B[rf])
(;W[qd];B[rf])
(;W[qa];B[rf]))
(;W[oc];B[rf]))
(;W[sc];B[ra])
(;W[oc];B[ra])))
(;W[oc];B[rb])))
(;W[qc];B[rc]
(;W[qb]
(;B[rb])
(;B[qd];W[rb];B[sb];W[ra];B[rd]))
(;W[qd];B[qb]
(;W[oc];B[rb])
(;W[rd];B[rb]
(;W[oc];B[rf])
(;W[sc];B[oc];W[nd];B[nb]))
(;W[rf];B[oc]
(;W[nd];B[nb])
(;W[nb];B[nd])))
(;W[oc];B[qd]))
(;W[rc];B[oc];W[nd];B[nb]
(;W[qb];B[ra]
(;W[qc];B[na]
(;W[rf];B[qd];W[rd]
(;B[rg]C[Seki])
(;B[rb];W[sb];B[rg];W[sc];B[sf];W[se];B[sg];W[mb];B[pa];W[oa];B[ob];W[ma]))
(;W[qd];B[rb];W[sb];B[sd];W[sc];B[rf];W[se]))
(;W[rb];B[na];W[qd];B[sd]))
(;W[rb];B[ra])
(;W[qc];B[ra])
(;W[mb];B[na])))
(;W[pe];B[rb];W[oc];B[rd])
(;W[oc];B[re]
(;W[qc];B[qd]
(;W[rd];B[qb])
(;W[pe];B[qb])
(;W[qb]))
(;W[qd];B[rb]
(;W[rc];B[rd]
(;W[qc];B[sc];W[pe];B[qb])
(;W[pe];B[sc];W[qc])
(;W[qb];B[qc]))
(;W[qc];B[rc]
(;W[qb];B[ra])
(;W[rd];B[sd];W[pe];B[qb])
(;W[pe];B[qb]))
(;W[rd];B[rc]
(;W[qc])
(;W[rf];B[pe]
(;W[qc];B[qb];W[se];B[sc]
(;W[sa];B[sd])
(;W[sd];B[sg])
(;W[rg];B[sd];W[re];B[sg];W[rh];B[sh];W[si];B[ri];W[sf];B[sh]))
(;W[sd];B[qc])
(;W[se];B[qc]))
(;W[pe];B[sd]))
(;W[pe];B[rd]
(;W[rc])
(;W[qc];B[qb];W[rc];B[sc]))
(;W[rf];B[rd]))
(;W[rb];B[rc])
(;W[qb];B[rc]))
(;W[qd]
(;B[rc]
(;W[qc];B[qb]
(;W[pe]
(;B[re];W[rd]
(;B[oc])
(;B[sd];W[rb];B[sc];W[ra]))
(;B[rd]
(;W[re]
(;B[rb];W[oc];B[sa])
(;B[sb]
(;W[sd];B[oc]
(;W[nb];B[nd];W[ra];B[rb];W[se];B[rf])
(;W[nd];B[nb];W[rb];B[ra])
(;W[se];B[nb]
(;W[rb];B[ra];W[sc];B[nd];W[rb];B[rc];W[rd];B[na])
(;W[nd];B[na])))
(;W[oc];B[sd])))
(;W[oc];B[sb];W[re];B[sd])))
(;W[oc]
(;B[re])
(;B[rb];W[pe];B[rd];W[re];B[sa]))
(;W[rd];B[rb]
(;W[pe];B[oc]
(;W[nb];B[nd])
(;W[nd];B[nb]))
(;W[oc];B[pe]))
(;W[re];B[pe]
(;W[oc];B[rb])
(;W[rd];B[rb]
(;W[oc];B[rf])
(;W[sc];B[oc];W[nd];B[nb]))
(;W[rf];B[oc]
(;W[nd];B[nb])
(;W[nb];B[nd]))))
(;W[qb];B[qc];W[ra];B[pe])
(;W[pe];B[qc];W[oc];B[rb])
(;W[oc];B[qc];W[pe];B[rb]))
(;B[qc];W[rc];B[rb];W[rd]))))
(;W[qd];B[qe]
(;W[qb]
(;B[qc];W[ra];B[og])
(;B[rb];W[ra]
(;B[qc])
(;B[rc];W[qc];B[rd];W[qa];B[pe]))
(;B[rc])
(;B[og];W[pe];B[qc]))
(;W[pe];B[rd]
(;W[og];B[oc]
(;W[qb];B[qc]
(;W[ra];B[nd])
(;W[nd];B[nb];W[ra];B[na]
(;W[qa];B[rb])
(;W[rc];B[qa]))
(;W[nb];B[nd]))
(;W[qc];B[qb]
(;W[rc];B[rb]
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[oc];B[og]
(;W[qb];B[qc])
(;W[qc];B[qb]))
(;W[qb];B[qc]
(;W[og];B[oc]
(;W[ra];B[nd])
(;W[nd];B[nb];W[ra];B[na]
(;W[qa];B[rb])
(;W[rc];B[qa]))
(;W[nb];B[nd]))
(;W[oc];B[og])
(;W[ra];B[og]))
(;W[qc];B[qb]
(;W[oc];B[og])
(;W[og];B[oc]
(;W[rc];B[rb]
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[nd];B[nb])
(;W[nb];B[nd]))
(;W[nd];B[og])))
(;W[oc];B[og];W[pe];B[qc])
(;W[og];B[oc];W[pe];B[qc])
(;W[rc];B[qc]
(;W[oc];B[og])
(;W[og];B[oc])))
(;W[nd];B[og])
(;W[pe];B[qe]
(;W[og];B[oc];W[nd];B[nb])
(;W[oc];B[og]
(;W[qb];B[rc])
(;W[qc];B[qb])
(;W[qd]))
(;W[qb];B[qc]
(;W[oc];B[og])
(;W[og];B[oc])
(;W[nd];B[og])
(;W[ra];B[og]))))
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