py_20080318
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s#19 with Roses
: White plays and force Black to mate him in the number of moves specified in the statement. : rounded KnightSergeï SMOTROVProbleemblad, 19993rd Prize
white Qh2 WRc4 Kc2 Rh7 Bc1
black Pc7c6e7g4 Rb8g8 BRa8a7 Ke1
s#19(5+9)c4, a8, a7: Roses
{if the pc7 was not there, we could have the following mate :
1. Dg3+ Re2 2. Txe7+ ROxe7# (note that the path of ROa7 is unique thanks to pc6)
due to the disappearance of the c7-pawn, ROa8 controls c3 by c7 and d5.
So you have to arrive in the position of the statement without the c7-pawn. It just needs 17 moves ! }
1.WRc4-e5 + Ke1-f1 2.WRe5-f7 + Kf1-e1 3.Bc1-d2 + Ke1-f1 4.Bd2-f4 Kf1-e1 {}
5.Qh2-d2 + Ke1-f1 6.Qd2-e3 + Kf1-g2 7.Qe3-e2 + Kg2-g1 8.Bf4-h2 + Kg1-h1 {}
9.Bh2*c7 + Kh1-g1 10.Bc7-h2+ Kg1-h1 11.Bh2-d6 + Kh1-g1 12.Qe2-h2 + Kg1-f1 {}
13.Bd6-f4 + Kf1-e1 14.Bf4-d2 + Ke1-f1 15.Bd2-c1 + Kf1-e1 16.WRf7-e5 + Ke1-f1 {}
17.WRe5-c4 + Kf1-e1 { et voila ! }
18.Qh2-g3 + Ke1-e2 19.Rh7*e7 + BRa7*e7 #
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