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| Friedrich Binder, Blathy-Gedenkturnier, 1961. Código FEN: Q7/1K6/8/8/N7/5p2/p7/k1b2r1b w - - 0 1. |
A posição acima é muito interessante. Embora programas de xadrez se confundam com ela, há uma sequência forçada até o xeque-mate. No YACPDB, está listada como mate em 25 lances. Entretanto, após muitos cálculos, eu digo: as Brancas jogam e dão xeque-mate em 21 lances!
(The position above is very interesting. Although chess softwares get confused with it, there is a forced sequence until checkmate. In YACPDB, it is listed as mate in 25 moves. However, after many calculations, I say: White to play and give checkmate in 21 moves!)
PCFilho
First, White gets rid of the rook:
ResponderExcluir1 Qh8+! Kb1 2 Qh7+ Ka1 3 Qg7+ Kb1 4 Qg6+ Ka1 5 Qf6+ Kb1 6 Qf5+ Ka1 7 Qe5+ Kb1 8 Qe4+ Ka1 9 Qd4+ Kb1 10 Qd3+ Ka1 11 Qxf1!
This threatens 12 Qxc1 mate. Black must guard the bishop (any other move allows a short mating continuation):
11 ... Kb1 12 Qd3+ Ka1
Now, White plays 13 Qe4! (waiting). Again, only one move keeps the short continuations at bay:
13 ... Bg2 14 Ka6! (threat 15 Qc2 (threat 16 Qc1 mate) B~ 16 Qd1+ Bc1 17 Qc1 mate) f2 15 Qxg2 (threat 16 Qxf2 (threat 17 Sc3 and 18 Qxa2) Bd2 17 Qxd2 Kb1 18 Qb2 or Qd1 mate) Kb1 16 Qe4+ Ka1 17 Qe5+ Kb1 18 Qf5+ Ka1 19 Qxf2 (threat 20 Sc3 and 21 Qxa2) Bd2 20 Qxd2 Kb1 21 Qb2 or Qd1
Very nice.
Well done, Jake!! I'm glad you arrived at the same conclusion. I was not wrong after all. :)
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