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Subject: 3 hard positions

Author: Vincent Lejeune

Date: 12:06:06 02/07/00


3 hard positions, if you want to torture your favourite chessengine for long
minutes ...
White to play and win!, The keymove is unique for each one.
N°1 will cause serious problem for nullmover
Solution below ...

Good work ! ;)

[D] 2k1r3/3q4/8/8/8/8/5RK1/6Q1 w - -
[D] 8/8/1P3P2/8/8/8/8/b2nk2K w - -
[D] 7Q/3k2p1/6p1/8/1K2Np2/8/8/5q2 w - -






[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "1"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2k1r3/3q4/8/8/8/8/5RK1/6Q1 w - - 0 10"]
[PlyCount "21"]

10. Rc2+ Kb8 11. Rb2+ Ka8 12. Qa1+ Qa7 13. Qh1 $3 Rb8 14. Kh2+ Rb7 15. Qd5 Qb8+
16. Kg2 Qc7 17. Ra2+ Kb8 18. Qg8+ Qc8 19. Ra8+ Kxa8 20. Qxc8+ *


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "2"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/1P3P2/8/8/8/8/b2nk2K w - - 0 1"]
[PlyCount "10"]

1. f7 Kf1 2. Kh2 Nf2 3. Kg3 Ne4+ 4. Kf4 Nc5 5. b7 Nd7 *


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "3"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7Q/3k2p1/6p1/8/1K2Np2/8/8/5q2 w - - 0 1"]
[PlyCount "35"]

1. Nc5+ Kd6 2. Qb8+ Kd5 3. Qg8+ Kd4 4. Qe6 Qh1 5. Qd6+ Ke3 6. Qe5+ Kf2 7. Nd3+
Kg2 8. Nxf4+ Kg3 9. Qg5+ Kf2 10. Qc5+ Kg3 11. Ne2+ Kg4 12. Qd4+ Kh3 13. Qe3+
Kg2 14. Nf4+ Kf1 15. Qe2+ Kg1 16. Qe1+ Kh2 17. Qf2+ Qg2 18. Qxg2# *




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