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Up Topic The Rybka Lounge / Test Positions / A remarkable position
- - By Venator (Silver) [nl] Date 2016-05-28 07:24
This is from Pachman-Fischer, Santiago 1959. There are white pawns on all central squares: e4,e5,d4 and d5. I had never seen this before!

5rk1/2p4p/Bpn1p3/p2PP1q1/3PP3/PP3p2/1BQ2P1r/2RRK3 b - - 0 24


Are there more examples of this?
Parent - - By Dadi Jonsson (Silver) [is] Date 2016-05-28 08:02
I found 90 games with four pawns of the same color on all central square. Here is the oldest example in the database that I searched:

[Event "Simultan"]
[Site "Czechoslovakia"]
[Date "1925.??.??"]
[Round "?"]
[White "Alekhine Alexander A (RUS)"]
[Black "Bestak"]
[Result "1-0"]
[ECO "D08"]

1. d4 d5 2. c4 e5 3. e3 e4 4. cxd5 Bd6 5. Nc3 Nf6 6. f3 Bf5 7. g4 Bg6 8. g5
Nh5 9. fxe4 O-O 10. Nf3 a6 11. a3 Re8 12. e5 Be7 13. e4 {[%t Shrt] ~1p} 13...
b5 14. Bd3 Qd7 15. Rf1 Rf8 16. Ne2 Qd8 17. Nh4 Nd7 18. Nf5 Bxf5 19. exf5 Nxe5
20. dxe5 Qxd5 21. f6 Qxe5 22. fxe7 Qxe7 23. Bd2 Rad8 24. Qc2 1-0
Parent - By Venator (Silver) [nl] Date 2016-05-28 08:42
Thanks, Dadi! That's a lot more positions than I expected :-).
Parent - By Peter Grayson (****) [us] Date 2016-06-03 10:03
Every engine I've run with this, including the old Genius engines immediately see Fischer's 24..Qg1+?? loses straight away when they indicate 24..exd5 retains a substantial advantage for Black. Isn't it amazing that today's engines take no time at all to find a better move? Perhaps the human mind becomes bamboozled by that pawn structure ... at least when playing Black.

[Event "Santiago"]
[Site "Santiago de Chile"]
[Date "1959.??.??"]
[Round "6"]
[White "Pachman, Ludek"]
[Black "Fischer, Robert James"]
[Result "1-0"]
[ECO "E51"]
[WhiteElo "2552"]
[BlackElo "2631"]
[Annotator "Grayson,Peter"]
[PlyCount "80"]
[EventDate "1959.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CHI"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 e6 3. d4 d5 4. e3 Nc6 5. Nc3 Bb4 6. Bd2 O-O 7. a3 Bxc3 8. Bxc3
Ne4 9. Qc2 a5 10. b3 b6 11. Bb2 Ba6 12. Bd3 f5 13. Rc1 Rc8 14. O-O Rf6 15. Rfd1
Rh6 16. Bf1 g5 17. cxd5 g4 18. Bxa6 gxf3 19. gxf3 Qg5+ 20. Kf1 Rxh2 21. fxe4
Rf8 22. e5 f4 23. e4 f3 24. Ke1 Qg1+ $4 ({Stockfish 070516 64:} 24... exd5 25.
Bf1 Qg1 26. Kd2 Rxf2+ 27. Kc3 Rxc2+ 28. Kxc2 Ne7 29. a4 Qe3 30. Kb1 f2 31. Ka2
Qxe4 32. Ba3 Rf7 33. Rd2 Rf3 34. e6 Qf4 35. Rdc2 Nf5 36. e7 Re3 37. Rd1 Nxe7
38. Rdd2 Rf3 39. Bxe7 Qe3 40. Rd3 Qe4 41. Rcd2 Rxd3 42. Bxd3 Qxd3 43. Rxd3 f1=Q
44. Rd2 Qf4 45. Rg2+ Kf7 46. Ba3 h5 47. Rc2 h4 48. Bc1 Qxd4 49. Rxc7+ Kg6 50.
Rc6+ Kf5 {[%eval -470,37]}) 25. Kd2 ({Stockfish 070516 64:} 25. Kd2 Qxf2+ 26.
Kd3 Nb8 27. Rg1+ Kh8 28. Bb7 Qh4 29. Qxc7 Qh6 30. Bc3 b5 31. Qc5 Nd7 32. Qxb5
exd5 33. exd5 f2 34. Rgf1 Qg6+ 35. Kd2 Rh3 36. Bxa5 Qe4 37. e6 Nf6 38. Rc7 Rh1
39. Kc1 Qg2 40. Ba6 Rxf1+ 41. Qxf1 Qxf1+ 42. Bxf1 Nxd5 43. Rd7 Ne3 44. Be2 Re8
45. Kd2 Rxe6 {[%eval 501,28]}) 25... Qxf2+ 26. Kc3 Qg3 27. Qd3 exd5 28. Rg1 Rg2
29. Rxg2 Qxg2 30. Qf1 dxe4 31. Qxg2+ fxg2 32. Rg1 Rf2 33. Bc4+ Kf8 34. Bd5 Rf3+
35. Kc4 b5+ 36. Kc5 Ne7 37. Rxg2 Nxd5 38. Kxd5 Rxb3 39. Kxe4 b4 40. axb4 axb4
1-0
Parent - By Felix Kling (Gold) [de] Date 2016-06-18 17:21
that's what I call a pawn centre ;-) didn't know this either
Parent - - By MoKy (**) [sk] Date 2016-07-12 07:01
Is this the shortest way to get there? I was black:

[Site "Lucenec"]
[Date "2001.11.25"]
[White "Rabovszky, Gyorgy"]
[Black "Kamody, Mario"]
[Result "1-0"]
[BlackElo "1943"]
[WhiteElo "2064"]

1. e4 b6 2. d4 Bb7 3. Nc3 e6 4. Bd3 Nf6 5. Nge2 c5 6. O-O Nc6 7. d5 Ne5 8. f4
c4 9. fxe5 cxd3 10. cxd3 Ng4 11. d4 h5 12. Rf3 Qh4 13. Bf4 Rh6 14. h3 Rh7 15.
Qd2 f6 16. Raf1 Be7 17. Bg3
Parent - By Dadi Jonsson (Silver) [is] Date 2016-07-12 17:32

> Is this the shortest way to get there?


I don't know, but at least it occurred later in all 90 games that I found. Move 12 was the earliest example, I think.
Up Topic The Rybka Lounge / Test Positions / A remarkable position

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