Michael Keller, L'Italia Scacchistica, 09/2006. Código FEN: 2n4n/q1rp1BK1/pb1N1Rp1/B3k3/5N2/2PP1p2/r7/5b2 w - - 0 1. |
Um problema difícil: as Brancas jogam e dão xeque-mate em 3 lances!
(A hard problem: White to play and give checkmate in 3 moves!)
PCFilho
Do you want a hint? :)
ResponderExcluirI think a hint for the solution would be helpful, but I've managed to find the following set mates:
ResponderExcluir1 ... Nxf7 2 Nxf7#
1 ... Bc5/Rb7/Rc4 2 N(x)c4#
1 ... Bxd3 2 Nxd3#
1 ... Rc5 2 d4#
Jake,
ResponderExcluirAll the set mates you found are correct, and are also important in the solution.
Therefore, it's natural to think that the d3-Pawn and both Knights can't move for now, as they will be requested in their current positions.
Note that the Rook also plays an important role where it is...
I think I have it now...
ResponderExcluir1 Bb4! (2 Nxg6+ Nxg6 3 Rf5#) 1-0
1 ... Bh3 2 d4+ Bxd4 3 Nd3#
1 ... Rg2 2 Bc5!! (3 d4#/Nc4#)
(2 ... Bxd3 3 Nxd3#)
(2 ... Nxd6 3 Bxd6#)
Did you notice that the Rg2 line contains a Novotny?
ResponderExcluirTags: Mate in 3, Novotny, Clearance Sacrifice
ResponderExcluirWell done, Jake.
ResponderExcluir1. Bb4!! is the key move, threatening 2. Nxg6+ and 3. Rf5#:
1. Bb4!! Rh2
2. Nxg6+!! Nxg6
3. Rf5#
If 1. ... Nxf7, then:
2. Nxf7#
If 1. ... Ne7, then:
2. Nc4+!! Rxc4
3. Bd6#
If 1. ... Rxc3, then:
2. Bxc3+!! Bd4
3. Nc4#
If 1. ... Bh3, then:
2. d4+!! Bxd4
3. Nd3#
If 1. ... Rg2, then:
2. Bc5!!, and mate follows:
2. ... Nxd6 3. Bxd6#
2. ... Rxc5 3. d4#
2. ... Bxc5 3. Nc4#
2. ... Rd2 3. Nc4#
2. ... Bxd3 3. Nxd3#
2. ... Nxf7 3. Nxf7#
And you're right about the Novotny theme in the Rg2 line. The White Bishop is sacrificed on c5, a square where it can be taken by two different Black pieces (Bishop and Rook) - and whichever Black piece makes the capture, it interferes with the other. :)