(;AW[hd]AW[he]AW[id]AW[jd]AW[kd]AW[kc]AW[lc]AW[md]AB[le]AB[ld]AB[ke]AB[je]AB[ie]AB[if]AB[ig]AB[jg]AB[kf]AB[kh]AB[lh]AB[li]AB[lj]AW[hf]AW[hg]AW[hh]AW[ih]AW[jh]AW[ki]AW[kj]AW[kk]AW[lk]AW[kg]AW[lg]TR[md]C[This time, our mighty hero Blackura must defend the fort. Assume sente is not important and get the most points of it.]SZ[13]AP[goproblems]
(;B[mj]
(;W[mg]C[CHOICE]
(;B[mf];W[mk]
(;B[lf]C[Well done, once again !RIGHT])
(;B[me];W[hk]C[White can tenuki, black is still dead !];B[mc];W[mh];B[lb];W[kb]C[Black is all dead !])
(;B[mh];W[mi]C[Ooops !!]))
(;B[lf]
(;W[mk]C[CHOICE]
(;B[mf]C[RIGHT])
(;B[me];W[hk]C[White can tenuki, black is still dead !];B[mc];W[mh];B[lb];W[kb]C[Black is all dead !])
(;B[mh];W[mi]C[Ooops !!]))
(;W[me]C[This is a slightly worse for white.];B[mh]
(;W[mk]C[];B[mf]C[The 2 stones are atari.RIGHT])
(;W[mc];B[mf]C[White has to add a stone at N3 to close the territory.RIGHT])))
(;B[mh];W[mk]C[Ooops !!])
(;B[me];W[mk]
(;B[lf];W[hk]C[White can tenuki, black is still dead !];B[mc];W[mh];B[lb];W[kb]C[Black is all dead !])
(;B[mf];W[hk]C[White can tenuki, black is still dead !];B[mc];W[mh];B[lb];W[kb]C[Black is all dead !]))
(;B[mk];W[me]
(;B[ll];W[kl]C[This is going nowhere !!]
(;B[mf];W[lf];B[mh];W[jf])
(;B[mh];W[mf]C[Black is all dead !])
(;B[lf];W[mf]))
(;B[mf];W[lf];B[mh];W[jf]C[Ooops !!];B[ll];W[kl]C[This is going nowhere !!])
(;B[mh];W[ml]C[Ooops !!])
(;B[lf];W[mf]C[Ooops !!]
(;B[ll];W[kl]C[This is going nowhere !!])
(;B[mh];W[jf];B[ll];W[kl]C[This is going nowhere !! Black is all dead !]))))
(;W[mf]C[Trick move detected. Blackura to make even more profit.CHOICE]
(;B[lf]
(;W[me];B[mg]C[Not good for white !RIGHT])
(;W[mg]C[CHOICE]
(;B[mh]C[Well done, once again !!RIGHT])
(;B[me];W[jf]C[Ooops !!])))
(;B[me]
(;W[mk]C[This move is a mistake.]
(;B[mh];W[mc]C[Only gote seki. Black survived. White must not play this way.])
(;B[mc];W[mh]
(;B[lf];W[mi];B[lb];W[kb]C[This is going nowhere !! Black is all dead !])
(;B[lb];W[kb]C[This is going nowhere !!];B[lf];W[mi]C[Black is all dead !])))
(;W[mh]C[CHOICE]
(;B[mc];W[mk]
(;B[lf];W[mi];B[lb];W[kb]C[This is going nowhere !! Black is all dead !])
(;B[lb];W[kb]C[This is going nowhere !!];B[lf];W[mi]C[Black is all dead !]))
(;B[lf];W[jf]C[Ooops !!])
(;B[mi];W[mk]C[Ooops !!])))
(;B[mh];W[mk]
(;B[lf];W[me];B[mg];W[mc]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;B[me];W[mc]C[Only gote seki. Black survived. White must not play this way.])))
(;W[mh]
(;B[lf];W[mk];B[mg];W[me]C[White is gote, so this variation is slightly worse for white. RIGHT])
(;B[me];W[mk])
(;B[mf];W[mk]))
(;W[me]C[This variation is only helping black. Computer should not play it.]
(;B[mf];W[mk]
(;B[mh];W[mc]C[RIGHT])
(;B[mg];W[mc]C[RIGHT]))
(;B[mg]
(;W[mf];B[lf]C[RIGHT])
(;W[mk];B[mf];W[mc]C[RIGHT]))
(;B[lf];W[mg];B[mh]
(;W[mk]C[];B[mf]C[The 2 stones are atari.RIGHT])
(;W[mc];B[mf]C[White has to add a stone at N3 to close the territory.RIGHT])))
(;W[mi]C[This variation is only helping black. Computer should not play it.];B[mh];W[mk];B[mf]C[RIGHT]))
(;B[me];W[mh]
(;B[lf];W[mg]
(;B[mc];W[mj];B[lb];W[kb]C[This is going nowhere !! Black is all dead !])
(;B[mf];W[jf]C[Ooops !!])
(;B[mi];W[mj]C[Ooops !!]))
(;B[mf];W[mj]C[Ooops !!])
(;B[mg];W[mf]
(;B[lf];W[jf]C[Ooops !!])
(;B[mc];W[mj]
(;B[lb];W[kb]C[This is going nowhere !!];B[lf];W[mi]C[Black is all dead !])
(;B[lf];W[mi];B[lb];W[kb])))
(;B[mi];W[mj]C[Ooops !!]))
(;B[mi];W[mf]
(;B[lf];W[mg]C[Black is all dead !!])
(;B[me];W[mc];B[mg];W[mh]C[Ko, not good enough !])
(;B[mg];W[mh]C[Ko, not good enough !]))
(;B[mh];W[mg]
(;B[mf];W[mj];B[lf]C[The fort survived, but 1 point was lost during the battle (7 points instead of 8) !])
(;B[mj];W[mk]C[Ooops !!])
(;B[me];W[mj]C[Ooops !!])
(;B[lf];W[mj];B[mf]))
(;B[lf];W[mj]
(;B[mi];W[mh]C[Ooops !!])
(;B[mh];W[me];B[mf];W[mc]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;B[me];W[mg];B[mc];W[mh];B[lb];W[kb]C[This is going nowhere !! Black is all dead !])
(;B[mf];W[mi]
(;B[mh];W[mg]C[Ooops !!])
(;B[mg]C[The fort survived, but 3 points were lost during the battle (5 points instead of 8) !]))
(;B[mg]
(;W[mi];B[me];W[mc]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;W[me];B[mi];W[mk]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])))
(;B[mk];W[mg]
(;B[mf];W[ml]
(;B[mj];W[mh]C[Ooops !!])
(;B[mh];W[mj]C[N3 was quite useless. The fort survived, but points were lost during the battle !])
(;B[mi];W[mj]C[Ko, not goos enough !!]))
(;B[mh];W[mj]C[Ooops !!])
(;B[mj];W[me]
(;B[ll];W[kl]C[This is going nowhere !!]
(;B[mf];W[lf];B[mh];W[jf])
(;B[mh];W[mf]C[Black is all dead !])
(;B[lf];W[mf]))
(;B[mf];W[lf];B[mh];W[jf]C[Ooops !!];B[ll];W[kl]C[This is going nowhere !!])
(;B[mh];W[ml]C[Ooops !!])
(;B[lf];W[mf]C[Ooops !!]
(;B[ll];W[kl]C[This is going nowhere !!])
(;B[mh];W[jf];B[ll];W[kl]C[This is going nowhere !! Black is all dead !])))
(;B[mi];W[me]C[Ooops !!])
(;B[me];W[mj]
(;B[mf];W[mh]C[Ooops !!])
(;B[lf]C[];W[mh]C[Ooops !!])
(;B[mh];W[mi]C[Ooops !!])
(;B[mi];W[mh]C[Ooops !!])
(;B[ml];W[mh]C[Ooops !!]))
(;B[lf];W[ml]
(;B[mj];W[mh]C[Ooops !!])
(;B[mi];W[mj]C[Ko, not good enough !])
(;B[mh];W[mj]C[N3 was quite useless. The fort survived, but points were lost during the battle !])))
(;B[mf]
(;W[mg]
(;B[lf];W[mj];B[mh])
(;B[mh];W[mj];B[lf]C[The fort survived, but 1 point was lost during the battle (7 points instead of 8) !]))
(;W[mj]
(;B[mh]C[The fort survived, but 1 point was lost during the battle (7 points instead of 8) !])
(;B[mg];W[mi]
(;B[mh];W[mk]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;B[lf]))
(;B[mi];W[mh]C[Ooops !!])))
(;B[mg];W[mj]
(;B[lf]
(;W[mi];B[me];W[mc]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;W[me];B[mi];W[mk]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !]))
(;B[mi];W[mh]C[Ooops !!])
(;B[me];W[mi]
(;B[lf];W[mc]C[The fort survived, but 2 points were lost during the battle (6 points instead of 8) !])
(;B[mh];W[mf]C[Ooops !!]))))