On May 15, 11:21 am, lqac....@[EMAIL PROTECTED]
wrote:
> This one is mine:
> 1. 4k3/qqqqqqqq/8/8/8/8/QQQQQQQQ/4K3 w - - 0 109: [pos. 1]
> White to play and mate in 4.
> There are no duals - only one moves mates in 4. [there is no mate in 3
> or less.]
> Move given at end of post, with sample continuation.
>
> These two were posed by me and solved by likesforests [see fics
> (www.freechess.org) or chess.com] in 20 minutes total!
>
> 2. Give a proof game for pos. 1, ie Show that the position in prob. 1
> is legally reachable by giving a game that leads to the position.
>
> 3. Okay, so you can reach a position where you have 16 queens on
> board. Can you construct a game which reaches a position with 18
> queens? If so, do so! [the last part carries 99% of the credit - it
> is to pre-empt the answers "yes" and "no".
>
>
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> (note: these can be more conveniently viewed at chess.com in the
> thread "advantage of moving first - mate in 4 in symmetrical position"
> in the forum-category "more puzzles")
>
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>
> Solution to 2: by likesforests
> [Event ]
> [Site ]
> [Date ..]
> [White likesforests]
> [Black likesforests]
> [Result 1-0]
> [PlyCount 216]
>
> 1. a4 b5 2. a5 b4 3. a6 Bb7 4. axb7 Nc6 5. Na3 bxa3 6. b8=Q a2 7. Rb1
> a1=Q 8. Qb3 Qa6 9. Qa2 Qb7 10. b4 a5 11. b5 a4 12. b6 Qa6 13. b7 a3
> 14. Qb3 a2 15. b8=Q a1=Q 16. Qh3 Q1a5 17. Qbb3 Ne5 18. Qbg3 c5 19. Rb3
> c4 20. c3 cxb3 21. c4 b2 22. c5 b1=Q 23. c6 Qba2 24. c7 Qb8 25. Bb2 f6
> 26. Bc3 Kf7 27. c8=Q d5 28. Qc4 Nc6 29. Qch4 d4 30. d3 dxc3 31. d4 c2+
> 32. Qd2 Ra7 33. f3 Q5a4 34. Kf2 c1=Q 35. d5 Qca3 36. d6 e5 37. e4 Nge7
> 38. d7 Kg8 39. d8=Q Qa8 40. Qb6 Nb4 41. Qbe3 Nbd5 42. exd5 e4 43. Ne2
> f5 44. Qeh6 f4 45. Kg1 e3 46. Nd4 e2 47. d6 e1=Q 48. d7 Qea1 49. d8=Q
> Nd5 50. Nc2 Nc3 51. Ne3 fxe3 52. Qdg5 e2 53. Qdf4 e1=Q 54. Qfg4 Qeb1
> 55. f4 g6 56. Qc5 g5 57. f5 Bg7 58. Qgc4+ Rf7 59. f6 Bf8 60. Q5b4 g4
> 61. Qe5 g3 62. Qe1 Ne4 63. Qcb3 Nd2 64. Qhc4 Nf3+ 65. gxf3 g2 66. Be2
> Bg7 67. Kf2 Bf8 68. Ke3 g1=Q+ 69. Kf4 Qgb6 70. Qcc3 Be7 71. Kg4 Qe6+
> 72. Kg3 Rf8 73. fxe7 Rf7 74. e8=Q+ Rf8 75. Qeb5 Qf7 76. f4 Re8 77. f5
> Re6 78. fxe6 Qff8 79. e7+ Qf7 80. Rf1 Qaf8 81. e8=Q Qa8 82. Qbb2 Q4a7
> 83. Qed2 Q3a6 84. Rf3 Q8b7 85. Qcc2 Qac4 86. Q4b3 Qad6+ 87. Kg2 Qdc7
> 88. Q3a2 Qce6 89. Qhe3 Qed7 90. Q8e4 Q8e7 91. Qb2b3 Qag7+ 92. Qg3 Qbb2
> 93. Bc4 Qbf6 94. Kf1 h5 95. Rf5 Qfxf5+ 96. Ke1 Rh6 97. Qxh6 Qfh7 98.
> Qhxh5 Qfxc4 99. Qee2 Qcf7 100. Qbb2 Kf8 101. Qgf2 Ke8 102. h4 Kf8 103.
> Qhg4 Qhxh4 104. Qgg2 Qhh7 105. Qbh5 Ke8 106. Qhh2 Qfe6 107. Qff3 Q6f6
> 108. Qff2 Qff7 1-0
>
>
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>
> solution to 3: by likesforests
>
> Event "?"]
> [Site "?"]
> [Date "????.??.??"]
> [White "likesforests"]
> [Black "likesforests"]
> [Result "1-0"]
> [PlyCount "198"]
>
> 1. a4 b5 2. a5 b4 3. a6 Bb7 4. axb7 Nc6 5. Na3 bxa3 6. b8=Q a2 7. Rb1
> a1=Q 8. Qb3 Qa6 9. Qa2 Qb7 10. b4 a5 11. b5 a4 12. b6 Qa6 13. b7 a3
> 14. Qb3 a2 15. b8=Q a1=Q 16. Qh3 Q1a5 17. Qbb3 Ne5 18. Qbg3 c5 19. Rb3
> c4 20. c3 cxb3 21. c4 b2 22. c5 b1=Q 23. c6 Qba2 24. c7 Qb8 25. Bb2 f6
> 26. Bc3 Kf7 27. c8=Q d5 28. Qc4 Nc6 29. Qch4 d4 30. d3 dxc3 31. d4 c2+
> 32. Qd2 Ra7 33. f3 Q5a4 34. Kf2 c1=Q 35. d5 Qca3 36. d6 e5 37. e4 Nge7
> 38. d7 Kg8 39. d8=Q Qa8 40. Qb6 Nb4 41. Qbe3 Nbd5 42. exd5 e4 43. Ne2
> f5 44. Qeh6 f4 45. Kg1 e3 46. Nd4 e2 47. d6 e1=Q 48. d7 Qea1 49. d8=Q
> Nd5 50. Nc2 Nc3 51. Ne3 fxe3 52. Qdg5 e2 53. Qdf4 e1=Q 54. Qfg4 Qeb1
> 55. f4 g6 56. Qc5 g5 57. f5 Bg7 58. Qgc4+ Rf7 59. f6 Bf8 60. Q5b4 g4
> 61. Qe5 g3 62. Qe1 Ne4 63. Qcb3 Nd2 64. Qhc4 Nf3+ 65. gxf3 g2 66. Be2
> Bg7 67. Kf2 Bf8 68. Ke3 g1=Q+ 69. Kf4 Qgb6 70. Qcc3 Be7 71. Kg4 Qe6+
> 72. Kg3 Rf8 73. fxe7 Rf7 74. e8=Q+ Rf8 75. Qeb5 Qf7 76. f4 Re8 77. f5
> Re6 78. fxe6 Qff8 79. e7+ Qf7 80. Rf1 Qaf8 81. e8=Q Qa8 82. Qhc1 ( 82.
> Qbb2 Q4a7 83. Qed2 Q3a6 84. Rf3 Q8b7 85. Qcc2 Qac4 86. Q4b3 Qad6+ 87.
> Kg2 Qdc7 88. Q3a2 Qce6 89. Qhe3 Qed7 90. Q8e4 Q8e7 91. Qb2b3 Qag7+ 92.
> Qg3 Qbb2 93. Bc4 Qbf6 94. Kf1 h5 95. Rf5 Qfxf5+ 96. Ke1 Rh6 97. Qxh6
> Qfh7 98. Qhxh5 Qfxc4 99. Qee2 Qcf7 100. Qbb2 Kf8 101. Qgf2 Ke8 102. h4
> Kf8 103. Qhg4 Qhxh4 104. Qgg2 Qhh7 105. Qbh5 Ke8 106. Qhh2 Qfe6 107.
> Qff3 Q6f6 108. Qff2 Qff7 ) h5 83. Qhc8 h4+ 84. Kg4 h3 85. Bf3 Rh5 86.
> Bg2 hxg2 87. h3 Rh4+ 88. Kxh4 g1=Q 89. Rf6 Qga7 90. Qec6 Q8b8 91. Q8a6
> Q8e7 92. Kg4 Kf8 93. h4 Qbe8 94. Rd6 Qg8+ 95. Kf3 Qbg6 96. h5 Q6g7 97.
> h6 Qad7 98. h7 Qa5 99. h8=Q Qdxd6
> 1-0
>
>
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>
> solution to 1: 1. Qaxf7+!
> Sample continuations:
> 1... Kd8 2. Qexe7+ Kc8 3. Qdxd7+ Kb8 4. Qdd8#
> 1... Qxf7 2. Qh8+ Qxh8 3. Qxh8+ Qf8 4. Qfxf8#
Very neat. Are you sure it is not already known?
I wonder if there is any twinning possible by moving the Ks.
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