15 Nov '05 20:46>
Proof Game in 14.0 moves
(Position after Black's 14th move. How did the game go?)
Originally posted by BigDoggProblemTrying to have a go at one of these proof games for the first time.
[fen]1n2k3/ppp1n2p/4p3/6pq/2r5/2b2p1b/PPPPPPPP/RNBQKBNR w KQ - 0 15[/fen]
Proof Game in 14.0 moves
(Position after Black's 14th move. How did the game go?)
Originally posted by BigDoggProblemBlack's moves were not too difficult to find (without the sequence). It was a lot harder to find the (purpose of the) 2 spare moves for white (Rh1-g3 via h4 - g4 to make room on the 3rd rank for the black rook and Qd1 -d5 - h5 - b5 to block the checking from the rook on h8. This is what I came up with:
Here's a tougher one:
[fen]rnbqkbnr/1pp1ppp1/1N4P1/1Q6/3R4/1PP3R1/1PP1PPPB/1N3BK1[/fen]
Proof Game in 24.5 moves
(position after white's 25th move)
Originally posted by Mephisto2Yep, that's it. The theme is sacrifice of three original pieces (Q,R,R) followed by 'replacement' promoted pieces returning to their homesquares (dubbed the 'Pronkin' theme in honor of Dmitry Pronkin, the composer of this problem).
Black's moves were not too difficult to find (without the sequence). It was a lot harder to find the (purpose of the) 2 spare moves for white (Rh1-g3 via h4 - g4 to make room on the 3rd rank for the black rook and Qd1 -d5 - h5 - b5 to block the checking from the rook on h8. This is what I came up with:
1.h2-h4 a7-a5
2.h4-h5 Ra8-a6
3.Rh1-h4 Ra6-g6
4. ...[text shortened]... 0.Ra4-d4 a5-a4
21.Kg3-h2 a4-a3
22.Kh2-g1 a3-a2
23.Bf4-h2 a2-a1=R
24.Rg4-g3 Ra1-a8
25.Qh5-b5