1. A4 - Search

  
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N. Bernal Varela, 2525
M. B. Oliveira, 2429

1-0

See game 118229




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There are 56 results for 1. a4 in the games.


Game_1   Game_2757   Game_2764   Game_2768   Game_6358   Game_8436   Game_8437   Game_8438   Game_8439   Game_8440   Game_8441   Game_8442   Game_8443   Game_8444   Game_8445   Game_8446   Game_8447   Game_8448   Game_8449   Game_8450   Game_8451   Game_8452   Game_8453   Game_8454   Game_8455   Game_8456   Game_13334   Game_13338   Game_13397   Game_13401   Game_13761   Game_30328   Game_32705   Game_33612   Game_50740   Game_50749   Game_50755   Game_55567   Game_55579   Game_61617   Game_61626   Game_67058   Game_68868   Game_90069   Game_104456   Game_106976   Game_108178   Game_108180   Game_108182   Game_108191   Game_108896   Game_112711   Game_112720   Game_112725   Game_119497   Game_120438  




There are at least 2 results for 1. a4 in the forum.


Hannes Rada    (2008-12-25 21:12:07)
Game 1

looked very promising for White. Without deeper looking into the position I thought that white is going to win here. But than I found that black has perpetual check due to his pair of rooks. With only 1 rook on booth side, i think white should win. Wolfang, have you analysed a possible exchange of rooks at move no. 51 51. Rb7 instead of 51. a4 ? I did not analyse this position, but at first sight this seems to be a good chance for winning this game. Can you comment this ?


Normajean Yates    (2008-12-17 18:05:42)
anyway, about the 16-queens mate-in-4:

Svante Carl von Erichsen showed it was possible to solve without computer help:

http://www.ficgs.com/user_page.php?page=problem_read&id=311

As for proof game, The foll is from my rec.games.chess.analysis post [it *was* .analysis I think - feeling too tired to search usenet]

" 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]
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"]
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#

"




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