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Europe Echecs

No. 458 , July 1997 - SOLUTIONS

638 - A. Zolotarev
Europe Echecs 458, 07/1997

Mate in 1 is with 1. g7xf6 Ng4xh2#.

Bl. 4 caps are h7xg6, c7xd6 and exfxg. Wh. caps are fxe, a6xb7 and bxc allowing the promotions of wPh2 to h8, wPa2 to b8, wPb2 to c8 and wPc2 to c8. Position unlocks when we can retract h7xg6 and free the wBh5. Retract
-1. Re6-f6+ f4xNg3
-2. Re8-e6 f5-f4
-3. Rb8-e8 e6xNf5
-4. b7-b8=R a7-a6
-5. a6xRb7
and Bl. retropat is avoided.

Further unlocking requires
(1) unpromoting wNf5 & wNg3 on c8,
(2) retracting wPbxRc4/5/6,
(3) retracting bPc7xQd6 with both bRs behind the bPs,
(4) unpromoting wQd6 on h8, retracting wP to h6,
(5) retracting bPh7xPg6.

Quadruple Ceriani theme.


639 - A. Frolkine
Europe Echecs 458, 07/1997
(This problem was later found to be cooked)

Author's intention: 1. e4 d5 2. Bc4 d4 3. Ne2 d3 4. O-O dxe2 5. d4 e1=B 6. Bh6 gxh6 7. a4 h5 8. a5 Bh6 9. a6 Be3 10. axb7 Nh6 11. bxa8=B O-O 12. Bc6 Bb7 13. B6b5 c6 14. Ra6 Qa5 15. Rb6 Qa2 16. Na3 Ba5 17. c3 Na6 18. Qc2 Ra8 19. Ra1 Kf8 20. Kf1 Ke8 21. f4 Bg1 22. Ke1

Both sides castled King-side and have the original KR occupying the QR square.

Unfortunately, this is cooked by 1. a4 d5 2. a5 d4 3. e4 Qd5 4. Bb5+ Kd8 5. Ne2 d3 6. O-O dxe2 7. d4 e1=B 8. Bh6 gxh6 9. a6 h5 10. axb7 Bh6 11. Ra6 Ba5 12. c3 Be3 13. Rb6 Qa2 14. bxa8=B Na6 15. Bd5 c6 16. Qc2 Kd7 17. Na3 Bb7 18. Ra1 Nh6 19. Kf1 Ra8 20. Bdc4 Ke8 21. f4 Bg1 22. Ke1


640 - S. Vokal
Europe Echecs 458, 07/1997

(a) Bl. may castle as in the following game: 1. Nf3 Na6 2. Nh4 Nc5 3. Ng6 Nb3 4. Nxf8 Nxc1 5. Ng6 Nb3 6. Qc1 Nxc1 7. Na3 Nb3 8. Nb5 hxg6 9. axb3 Nh6 10. f3 Ng8 11. h3 Nh6 12. Rg1 f6 13. O-O-O O-O

(b) Here the usual parity argument shows that the bK or the bR must have moved, explaining how Bl. played an even number of moves in the diagram position. Hence Bl. may not castle king-side right now. (He may castle queen-side later.)


641 - T. Le Gleuher
Europe Echecs 458, 07/1997

Position is legal: Bl. visible caps are bxc, dxcxb, gxh and wBc1 at home. Wh. caps are c2xd3xe4, e2xf3xg4 and g3xBh4. Several tries need more than 14 moves.

Solution: 1. b5 2. Kb6 3. Kc5 4. Kd4 5. Kxe4 6. Kf4 7. Qf3 8. hxg4 ep 9. gxf2 10. Rg1 11. Qg2 12. Kf3 13. Ke2 14. Kf1 and 1. Bxb5#