[Retros] CCC Puzzles

[Gerd Wilts]

Dear Nikolai,

your CCC proof game (or rather CC proof game, as castling is not used) in 9,0 is correct (a nice unique beginning), but the longer one in 25.0 is unfortunately not sound:

1. d4  c5  2. dxc5  Qa5+  3. b4  Qxb4+  4. c3  Qxc3+  5. Qd2 Qxc1+  6. Qd1  Qc3+  7. Qd2  Qc1+  8. Qd1  Qc3+  9. Sd2  Qxd2+ 10. Kxd2  d6 11. Qa4+  b5 12. Qxb5+  Kd8 13. Qb6+  axb6 14. Rb1  bxc5 15. Rb2  Rxa2 16. Sh3  Rxb2+ 17. Kd3  Rd2+ 18. Ke4  d5+ 19. Kf3  Bg4+ 20. Ke3  Rxe2+ 21. Bxe2  Kd7 22. Bxg4+  e6 23. Bxe6+  fxe6 24. Kf4  Se7 25. Ke5  Sg6#

Best wishes,

Gerd
  -----Ursprüngliche Nachricht-----
  Von: retros-bounces at janko.at [mailto:retros-bounces at janko.at]Im Auftrag von ??????? ???????
  Gesendet: Dienstag, 3. November 2009 16:25
  An: retros at janko.at
  Betreff: [Retros] CCC Puzzles


  Dear Mario, dear Gerd,

  Here is the best I was able to come up with last night and this morning; for the sake of clarity, I will only write what the move is and not what it is not. I also find it easier to write ":" for capture (I am used to Russian notation), please excuse me for this!

  First, one little problem: A chess game begins with
  1. [] []
  2. [:] [+]
  3. [] [:+]
  4. [] [:+]
  5. [] [:+]
  6. [] [+]
  7. [] [+]
  8. [] [+]
  9. [] [+] ...
  Who wins?

  Then, if this problem hopefully does not turn out cooked, the game could be continued like this:

  1. [] []
  2. [:] [+]
  3. [] [:+]
  4. [] [:+]
  5. [] [:+]
  6. [] [+]
  7. [] [+]
  8. [] [+]
  9. [] [:+]
  10. [:] []
  11. [+] []
  12. [:+] []
  13. [+] [:]
  14. [] [:]
  15. [] [:]
  16. [] [:+]
  17. [] [+]
  18. [] [+]
  19. [] [+]
  20. [] [:+]
  21. [:] []
  22. [:+] []
  23. [:+] [:]
  24. [] []
  25. [] [#]

  The intended solutions for both problems are at the bottom of the post. Please write if you find them sound!
  Best wishes,
  Nikolai

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  1. d4 c5 2. dc Qa5+ 3. b4 Q:b4+ 4. c3 Q:c3+ 5. Qd2 Q:B+ 6. Qd1 Qc3+ 7. Qd2 Qc1+ 8. Qd1 Qc3+ 9. Qd2 Qc3+, and the game is drawn by the triple repetition rule. 

  1. d4 c5 2. dc Qa5+ 3. b4 Q:b4+ 4. c3 Q:c3+ 5. Qd2 Q:B+ 6. Qd1 Qc3+ 7. Qd2 Qc1+ 8. Qd1 Qc3+ 9. Nd2 Q:N+ 10. Q:Q Kd8 11. Qa5+ b6 12. Q:P+ Ke8 13. Qd8+ K:Q 14. c6 dc 15. g4 B:P 16. Kd1 B:P+ (the following waltz between the King and the Bishop is the part of the intended solution that I find most interesting) 17. Kc2 Bd3+ 18. Kb3 Bc4+ 19. Kc2 Bb3+ 20. Kb1 B:P+ 21. R:B Kd7 22. R:P+ Ke6 23. R:P+ B:R 24. Bd3 Bf6 25. Bc2 Ra1# 











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