TalkChess.com

Mikhael Tal apparently solved this puzzle but Komodo11 and Stockfish 8 can't
work it out . Any programs out there that can find the mate?
[d] 8/3P3k/n2K3p/2p3np/1b4N1/2p1p1P1/8/3B4/W- - 01

1)Nf6+ kg7 2) Nh5+ kg6 3) Be2+ kxh5 4) d8(Q) nf7+ 5) Ke6 nxQ 6) Kf5! e2 7) Be4 e1(n) 8) Bd5 c2 9) Bc4 c1(n) 10)Bb5 ne2 11)Be8+ nf7 12)Bxn mate

Sorry ;don't know why the picture didn't happen. Maybe someone can explain?
rabbits

rabbits23 wrote:Sorry ;don't know why the picture didn't happen. Maybe someone can explain?
rabbits

Bad FEN. It should be:

[D] 8/3P3k/n2K3p/2p3np/1b4N1/2p1p1P1/8/3B4 w - - 1

Apologies again! Am very embarrassed. White places 3) Bc2+ not Be2.
rabbits

rabbits23 wrote:Mikhael Tal apparently solved this puzzle but Komodo11 and Stockfish 8 can't
work it out . Any programs out there that can find the mate?
[d] 8/3P3k/n2K3p/2p3np/1b4N1/2p1p1P1/8/3B4/W- - 01

1)Nf6+ kg7 2) Nh5+ kg6 3) Be2+ kxh5 4) d8(Q) nf7+ 5) Ke6 nxQ 6) Kf5! e2 7) Be4 e1(n) 8) Bd5 c2 9) Bc4 c1(n) 10)Bb5 ne2 11)Be8+ nf7 12)Bxn mate

I think the diagram has no photo because this position was already analyzed gazillion times?
But seriously it's because of your /W at the end of your fen notation I guess. Just compare above.

[d]8/3P3k/n2K3p/2p3np/1b4N1/2p1p1P1/8/3B4 w - - 0 1

[pgn][Event "Computer chess game"]
[Site "Talkchess"]
[Date "2017.06.27"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[BlackElo "2400"]
[TimeControl "0+2"]
[SetUp "1"]
[FEN "8/3P3k/n2K3p/2p3np/1b4N1/2p1p1P1/8/3B4 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "14"]
[WhiteType "human"]
[BlackType "human"]

1. Nf6+ Kg7 2. Nxh5+ Kg6 3. Bc2+ Kxh5 4. d8=Q Nf7+ 5. Ke6 Nxd8+ 6. Kf5 e2
7. Be4 e1=N *
[/pgn]

Mate in 8 after e1=N but that is the beautiful main line, the stronger defence for black is different and would be longer than Mate in 16.

I think if a part of the fen "2p1p1P1" is used to searched the thread here at talkchess, there would be many hits for this position.

Thanks John. I'm just learning
rabbits

Thanks Mike. I'll work on sorting it out.
rabbits

rabbits23 wrote:Thanks Mike. I'll work on sorting it out.
rabbits

My apologies, I tried searching using a part of the fen string, but the search function of talkchess doesn't function like the grep utility of the open source world. It doesn't return useful results, or maybe I need to learn some search tricks on this forum too.

Hi Mike!

Probably you didn't find the fen because there's one more pawn on h5 then in the orignal Van Breukelen- study, that has been discussed already here several times.
It just doesn't matter after 2.Nh5+ (Nxh5+)

Thanks Peter ;you're right, there should not have been a black pawn on h5. It
was late at night and I was tired when I wrote up the position. I was unaware it had been exhaustively analysed either.
Cheers rabbits