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Probleemblad

March 2003

R194 - Reto Aschwanden

Probleemblad, Mar. 2003

1. d4 h5 2. d5 h4 3. d6 Rh5 4. dxc7 d5 5. c4 Bg4 6. c8=B Qa5+ 7. Nc3 b6 8. Bf5 Rxf5 9. c5 g5 10. c6 Bg7 11. c7 Be5 12. c8=B f6 13. Bd7+ Nxd7 14. e3 O-O-O 15. Ba6+ Kb8 16. Bc8 Rxc8

Two CF bishops (captured by pieces, not pawns) and a captured anti-Pronkin bishop on c8.


R195 - Unto Heinonen

Probleemblad, Mar. 2003

1. e3 g6 2. Qf3 Bg7 3. Qc6 dxc6 4. Ke2 Qd4 5. Kf3 Qb6 6. Kf4 Bd4 7. Kg5 Nf6 8. Kh6 Be6 9. Kg7 Nbd7 10. Kxh8 O-O-O+ 11. Kg7 Rg8+ 12. Kh6 Nf8 13. Kg5 N6d7 14. Kf4 f6 15. Kf3 Bf7 16. Ke2 e6 17. Ke1

Long journey by the king to capture a rook.


R196 - Thierry le Gleuher

Probleemblad, Mar. 2003

1. c4 Nf6 2. c5 Rg8 3. c6 Nxc6 4. g4 Ne5 5. g5 c5 6. g6 Nxg6 7. h4 Nh8 8. h5 g6 9. h6 Bxh6 10. d4 Bxc1 11. b4 h6 12. b5 Nh7 13. b6 Qxb6 14. Nd2 Qb1 15. a4 b5 16. a5 b4 17. a6 Bxa6 18. e3 Bxf1 19. f4 a5 20. f5 Ra6 21. f6 Rxf6 22. e4 d6 23. e5 Kd7 24. e6+ Kxe6 25. d5+ Kxd5

All white pawns are captured, after moving, by an officer.


R197 - Pascal Wassong

Probleemblad, Mar. 2003

1. a4 Nh6 2. Ra3 Nf5 3. Rg3 Nd4 4. Rg6 fxg6 5. d3 Kf7 6. Bg5 Kg8 7. Bf6 exf6 8. c4 Bd6 9. c5 Bf4 10. c6 Bh6 11. cxd7 c5 12. e4 c4 13. e5 c3 14. e6 Qa5 15. e7 Qh5 16. e8=B a5 17. d8=R Ra6 18. Rd5 Rb6 19. Bb5 Nbc6 20. Bc4 Na7 21. Ba2 Rb3 22. Rc5 Ndb5 23. Rc4 Ra3 24. Bb3 Ra1 25. Ne2 Na3 26. Nc1 b5 27. Na2 Ba6 28. Rc8#

But this is cooked: 1. a4 a5 2. Ra3 Ra6 3. Rg3 Nf6 4. d3 Ne4 5. Bg5 Nc3 6. Bf6 exf6 7. e4 Bc5 8. e5 Be3 9. e6 Nb5 10. c4 Kf8 11. e7+ Kg8 12. e8=B Qe7 13. c5 Qe5 14. c6 Qh5 15. cxd7 Rc6 16. d8=R Rc1 17. Rd4 Bh6 18. Bd7 c5 19. Be6 c4 20. Na3 Ra1 21. Nb1 c3 22. Bb3 Na3 23. Rc4 b5 24. Ne2 Ba6 25. Nc1 Nc6 26. Na2 Na7 27. Rg6 fxg6 28. Rc8#


R198 - Guus Rol

Probleemblad, Mar. 2003

Essential is the information that the repetition occurred due to repetition, and not due to the 50-move rule. The repetition cycle must be less than 50 half moves.

Tries:

a) +Bf1: Too many captures, both f1 and b1 are promoted bishops

b) +Bg1: To avoid a premature repetition, the last black move must've been a capture: Bf2xSg1. White only has one last move before this, g3xh4, but this is illegal, since the black king can't have reached the 1st row!

c) +Bd8 (or somewhere else outside the cage). This leads to a repetition cycle which is too long: 1... Kf2 2. Rc1 Bc7+ 3. Kh1 Kg3 4. Kg1 Kf4 5. Kh2 Ke5 6. Kg3 Bb8 7. Kg4 Bc7 8. Kg5 Bb8 9. Kh6 Kf4 10. Rg1 Kg3 11. Rh1 Kf2 12. Rh2 Ke1 13. Kg5 Kd1 14. Kg4 Bg3 15. Rh1+ Be1 16. Rf1 Kc1 17. Rf2 Kd1 18. Kg3 Kc1 19. Kh2 Kd1 20. Rf1 Kc1 21. Rh1 Kd1 22. Kg1 Bg3 23. Rh2 Ke1 24. Rh1 Bc7 25. Rh2 Bb6 26. Rh1 Bd8 27. Kh2+

Solution:

+bBf2! (with retro moves Kg1x[RN]h2 Bg3xNf2.

Shortest repetition cycle: 1... Bg1+ 2. Kg3 Kd1 3. Rh2 Bf2+ 4. Kg4 Bg3
5. Rh1+ Be1 6. Rf1 Kc1 7. Rf2 Kd1 8. Kg3 Kc1 9. Kh2 Kd1 10. Rf1 Kc1 11.
Rh1 Kd1 12. Kg1 Bg3 13. Rh2 Ke1 14. Rh1 Bf2+ 15. Kh2+


R199 - Michel Caillaud

Probleemblad, Mar. 2003

a) The shortest repetition cycle is 54 half-moves, so the position is drawn due to the 50-move rule.

1... Kc5+ 2. Bb5 Bb8 3. Bc4 Bc7 4. Bb5 Bd8 5. Bc4 Bf6 6. Bb5 Be5 7. Bc4 Bf4 8. Bb5 Be3 9. Bf2 Rg3 10. Be1 Rg1 11. Bf2 Ra1 12. Be1 Ra4 13. Bf2 Rc4 14. Bd7 Kb4 15. Be6 Kb5 16. Be1 Ra4 17. Bf2 Ra1 18. Bc8 Rg1 19. Be1 Rg3 20. Bf2 Rh3 21. Bg3 Bf4 22. Be6 Be5 23. Bc8 Bf6 24. Be6 Bd8 25. Bc8 Bc7 26. Be6 Bb8 27. Bc8 Ba7 28. Bd7+

(Note that with the bishop on b8 instead of a7, the cycle is 50 half-moves long, and one can choose whether the 50-move rule or the 3-fold repetition rule ends the game!

b) There aren't enough possible positions to reach the 50-move rule without applying the 3-fold repetition first. The longest possible game is 45.5 moves long. E.g. starting from wKd2, wBe6, bNc8:

1. Kd3 Na7 2. Bc8 Nc6 3. Be6 Ne7 4. Bc8 Ng6 5. Be6 Nf8 6. Bc8 Nh7 7. Be6 Nf6 8. Bc8 Nh5 9. Be6 Ng7 10. Bc8 Ne8 11. Be6 Nc7 12. Bc8 Na8 13. Be6 Nc7 14. Bc8 Ne8 15. Be6 Ng7 16. Bc8 Nh5 17. Be6 Nf6 18. Bc8 Nh7 19. Be6 Nf8 20. Bc8 Ng6 21. Be6 Ne7 22. Bc8 Nc6 23. Be6 Na7 24. Bd7+ Nc6 25. Bc8 Ne7 26. Be6 Ng6 27. Bc8 Nf8 28. Be6 Nh7 29. Bc8 Nf6 30. Be6 Nh5 31. Bc8 Ng7 32. Be6 Ne8 33. Bc8 Nc7 34. Be6 Na8 35. Bc8 Nc7 36. Be6 Ne8 37. Bc8 Ng7 38. Be6 Nh5 39. Bc8 Nf6 40. Be6 Nh7 41. Bc8 Nf8 42. Be6 Ng6 43. Bc8 Ne7 44. Be6 Nc6 45. Bc8 Na7 46. Bd7+


R183c - Arpad Molnar

Probleemblad, Mar. 2003

-1... a3xRb2 -2. Rc2-b2 b4xRa3 -3. Ra2-a3 c5xRb4 -4. Na8-b6 c6-c5 -5. Na8-c7 c7-c6 -6. Nb6xRa8 Rb8-a8 etc.


R184c - Gligor Denkovski

Probleemblad, Mar. 2003

1. c4 Nc6 2. Qc2 Ne5 3. Qg6 hxg6 4. c5 Rh4 5. c6 Ra4 6. cxb7 Ng4 7. b8=Q Ba6 8. Qb3 Qb8 9. Qc2 Qb3 10. h4 O-O-O 11. h5 Re8 12. h6 Kd8 13. h7 Bc8 14. hxg8=N a6 15. Nf6 gf6 16. Qd1 f5