9

enter image description hereSomething I want to know is the most number of passed pawns in a chess game that is theoretically possible. This reminds me of that famous 9 passed pawns game. Does anyone know? And if so, what is the fastest way possible if you can think of a way?

Update: The best answer is 20 moves based on what has been shown. Thanks for the help everyone!

  • That is irrelevant. – Ivan Lerner Dec 25 '18 at 20:06
  • What do you mean that this months old question is irrelevant? – Rewan Demontay Dec 27 '18 at 21:43
12

EDIT: record is now 20.0 moves! (See below.)

If we like pawns undoubled...


[title "16 non-doubled passed pawns in 21.0 moves"]
[fen ""]
[startply "42"]

1. g4 h5 2. g5 Rh6 3. gxh6 g5 4. h4 g4 5. b4 e5 6. f4 e4 7. Nf3 exf3 8. e4 f5 9. e5 Qg5 10. Nc3 a5 11. Ne4 fxe4 12. c4 a4 13. Qb3 axb3 14. a4 b5 15. a5 d5 16. c5 Bd6 17. cxd6 c5 18. Ra4 c4 19. d4 Na6 20. hxg5 Nc5 21. dxc5 bxa4 *

If we like all our pawns doubled, there's just a small improvement possible...


[title "16 passed pawns (all doubled) in 20.5 moves"]
[fen ""]
[startply "41"]

1. a4 b5 2. a5 d5 3. c4 h5 4. Ra4 bxa4 5. c5 e5 6. g4 Bd6 7. cxd6 c5 8. e4 f5 9. Ne2 h4 10. Ng3 hxg3 11. h4 Rh5 12. gxh5 g5 13. Bc4 dxc4 14. d4 f4 15. Be3 Bf5 16. exf5 fxe3 17. f4 e4 18. d5 Qb6 19. axb6 a5 20. b4 g4 21. b5 *

But best of all, curiously, is if we mix doubled and undoubled...


[title "16 passed pawns in 20.0 moves!"]
[fen ""]
[startply "40"]

1. d4 c5 2. f4 e5 3. f5 d5 4. Bf4 Be6
5. fxe6 exf4 6. e4 f5 7. e5 c4 8. Bd3 Bc5
9. dxc5 cxd3 10. c4 a5 11. b4 a4 12. Qb3 axb3
13. a4 b5 14. a5 h5 15. g4 Rh6 16. g5 d4
17. gxh6 g5 18. h4 g4 19. Ra4 Qg5 20. hxg5 bxa4 *

I don't think this can be beaten, and the other 20-move positions are quite narrowly defined: the captures from a file to h file must be R,Q,B,B,B,B,Q,R/N.

  • 2
    Could you show the moves? – limits Mar 23 '18 at 1:34
  • 2
    Add the tag: [Startply "3"] would put the diagram at white's second move. – Fred Knight Mar 23 '18 at 5:37
  • Animation added, thanks folks! And I found a way to save 2.0 moves on the undoubled task! – Laska Mar 23 '18 at 15:31
  • Just put up an animation and we'll all be happy! – Rewan Demontay Mar 24 '18 at 3:39
  • 1
    Sorry. I'll fix that. – Rewan Demontay Apr 4 '18 at 0:50
10

16 passed pawns in 26 moves.


[fen ""]
[startply "52"]

1. b4 a5 2. b5 Na6 3. bxa6 b6 4. Ba3 c6 5. Bb4 axb4 6. a4 b5 7. a5 c5 8. d3 c4
9. Nd2 Qc7 10. Nb3 cxb3 11. c4 d5 12. c5 d4 13. Qd2 e5 14. Qc3 dxc3 15. d4 e4
16. e3 Bh3 17. Bd3 exd3 18. gxh3 h5 19. Ne2 h4 20. Ng3 hxg3 21. h4 g5 22. h5 g4
23. h4 g2 24. f4 Qe5 25. fxe5 f5 26. e4 f4 *

  • 4
    one could argue whether a second doubled pawn is passed or not (a5, b5,e4,g4,b4 and h4 in your game). You have enough possible captures left to undouble all but one, reaching 15 "uncontested" passed pawns. And 16 must be possible. – Evargalo Mar 20 '18 at 13:37
  • 1
    I'm pretty sure any pawn not attacked by another pawn is passed, regardless if doubled or not. And thanks for the help! – Rewan Demontay Mar 22 '18 at 0:00
  • 1
    You welcome for the clarification! – Rewan Demontay Mar 24 '18 at 3:36

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