J. C. van Gool, Journal de Genève, 1977. Código FEN: B6R/6P1/7N/Q1K1P1P1/1p3bN1/4p1Br/6b1/R5qk w - - 0 1. |
Um problema "impossível": as Brancas jogam e dão xeque-mate em 2 lances!
(An "impossible" problem: White to play and give checkmate in 2 moves!)
PCFilho
1 Nf5!! 1-0
ResponderExcluirPossible lines:
1 ... Bxa8 2 Qxa8#
1 ... Bb7(or c6 or d5 or e4 or f3) 2 BxB#
1 ... Rxh8 2 gxh8=R#
1 ... Rh7(or h6 or h5 or h4 or h2) 2 RxR#
1 ... Qxa1 2 Qxa1#
1 ... Qb1(or c1 or d1 or e1 or f1) 2 RxQ#
1 ... Bxg3 2 Nxg3#
1 ... Any other move 2 Rxh3#
Well done, Jake Hoover!
ResponderExcluir1. Nf5!! is the key move! Below, I show all the possible lines:
1. Nf5 Bxg3 2. Nxg3#
1. Nf5 Bxe5 2. Rxh3#
1. Nf5 b3 2. Rxh3#
1. Nf5 e2+ 2. Nf2#
1. Nf5 Rh4 2. Rxh4#
1. Nf5 Rh5 2. Rxh5#
1. Nf5 Rh6 2. Rxh6#
1. Nf5 Rh7 2. Rxh7#
1. Nf5 Rxh8 2. gxh8=Q# or 2. gxh8=R#
1. Nf5 Rh2 2. Rxh2#
1. Nf5 Bf3 2. Bxf3#
1. Nf5 Be4 2. Bxe4#
1. Nf5 Bd5 2. Bxd5#
1. Nf5 Bc6 2. Bxc6#
1. Nf5 Bb7 2. Bxb7#
1. Nf5 Bxa8 2. Qxa8#
1. Nf5 Qf1 2. Rxf1#
1. Nf5 Qe1 2. Rxe1#
1. Nf5 Qd1 2. Rxd1#
1. Nf5 Qc1+ 2. Rxc1#
1. Nf5 Qb1 2. Rxb1#
1. Nf5 Qxa1 2. Qxa1#
:)
PS: I think this is the "mate-in-2" with the biggest number of lines I have ever seen!
ResponderExcluirBTW, Paulo, the pin is my third favorite chess tactic, after the double check and discovered check. And this puzzle is a perfect example of how multiple pins can really screw someone over.
ResponderExcluirYes, Jake, after 1. Nf5!!, Black has Queen, Rook and Bishop simultaneously pinned.
ResponderExcluirThat's why, no matter what Black tries, checkmate comes next move. Simply no piece is available to defend the poor King...
Nf2 , mate in 1 ?
ResponderExcluirIf 1. Nf2, then Pawn takes Knight... :)
ResponderExcluir