Author: Dann Corbit
Date: 21:24:12 06/06/02
Go up one level in this thread
On June 06, 2002 at 20:41:42, Jon Dart wrote:
>This is a recent test game Arasan vs. Pharaon:
>
>[Event "?"]
>[Site "-"]
>[Date "2002.06.05"]
>[Round "?"]
>[White "Arasan 6.0"]
>[Black "Pharaon 2.62"]
>[Result "0-1"]
>[ECO "B33"]
>[TimeControl "1200+0"]
>
>1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nf6 6. Ndb5 d6
>7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Nd5 Be7 11. Bxf6 Bxf6 12. c3 O-O
>13. Nc2 Bg5 14. a4 bxa4 15. Rxa4 a5 16. Bc4 Rb8 17. b3 Kh8 18. O-O f5
>19. exf5 Bxf5 20. Nce3 Bg6 21. Qg4 Rb7 22. Kh1 Rbf7 23. f3 Rb7
>24. Rfa1 Rb8 25. Qe6 e4 26. fxe4 Ne5 27. Rxa5 Bxe3 28. Nxe3 Bf7
>29. Qh3 Nxc4 30. Nxc4 Bxc4 31. Rh5 Bg8 32. b4 Qe8 33. e5 Rb5 34. Qh4
>Rxe5 35. Rxe5 Qxe5 36. Qe1 Ra8 37. Rc1 Qxe1+ 38. Rxe1 Ra3 39. Rc1 Bd5
>40. Kg1 Ra2 41. Rd1 Rxg2+ 42. Kf1 Bb3 43. Kxg2 Bxd1 44. b5 Ba4 45. b6
>Bc6+ 46. Kg3 Kg8 47. Kf4 Kf7 48. c4 Ke6 49. Ke3 Bb7 50. Kd4 Kd7
>51. Kd3 0-1 {White resigns}
>
>An interesting move here is 25 .. e4 from this position:
>
>[D] 1r1q1r1k/6pp/2npQ1b1/p2Np1b1/R1B5/1PP1NP2/6PP/R6K b - -
>
>Crafty 18.10 doesn't like this move:
>
> 25. Qe6 e4
> ({13:+0.33} 25. ... e4 26. fxe4 Ne5 27. Qh3 Bxe4 28. Rxa5 Nxc4
>29. Nxc4 Rf2 30. Qg4 Bxg2+ 31. Kg1 Bf3 32. Qf5 Rg2+ 33. Kf1 $14)
> ({13:+0.00} 25. ... Be8 26. Qg4 Bg6 $10)
> ({13:+0.00} 25. ... Bf7 26. Qg4 Bg6 $10)
> ({13:+0.01} 25. ... Bxe3 26. Nxe3 Bf7 27. Qg4 Bxc4 28. Rxc4 Ne7
> 29. Ra3 Rf6 30. Rca4 Rc8 31. Nc4 Nd5 32. b4 Rf4 $10)
> 26. fxe4 Ne5
> 27. Rxa5
> ({13:-1.06} 27. Rxa5 Bxe3 28. Nxe3 Bf7 29. Rxe5 Bxe6 30. Rxe6 Q
>g5 31. Re1 Rbd8 32. Nf5 Qd2 33. Rf1 Qxc3 34. Rxd6 Rxd6 35. Nxd6 Rxf1+ 36. Bxf1 Q
>xb3 $17)
> ({13:-0.70} 27. Bf1 Rxb3 28. Rxa5 Bxe4 29. R5a4 Bg6 30. Ra8 Rb8
> 31. Rxb8 Qxb8 32. Kg1 Bxe3+ 33. Nxe3 Rf6 34. Qe7 Be4 $15)
> ({13:-0.81} 27. Qh3 Nxc4 28. Rxc4 Rxb3 29. Nf5 Rb2 30. Qg4 h5 3
>1. Qf3 Rb5 32. Rd4 Bf6 33. Rda4 Bg5 $17)
>
>But notice that by move 27, it sees that as a result of e4 fxe4 Ne5, White can't
>do better than -0.70.
>
>Pharaon itself switches to e4, early but the score doesn't start to go up
>significantly for quite a while:
>
> 7. -28 1 353770 e4 fxe4 Re8 Qh3 Bxe4 Nf5 h6
> 7-> -28 2 469433 e4 fxe4 Re8 Qh3 Bxe4 Nf5 h6
> 8. -33 2 802767 e4 fxe4 Re8 Qh3 Bxe4 Nf5 Re5 Nde3
> 8. -33 5 1573056 Be8!
> 8. -33 5 1701477 Re8!
> 8-> -33 6 1934613 e4 fxe4 Re8 Qh3 Bxe4 Nf5 Re5 Nde3
> 9. -19 7 2533726 e4 fxe4 Re8 Qg4 Bxe4 Rf1 Rb7 Nf5 Rf7
> 9-> -19 9 3059277 e4 fxe4 Re8 Qg4 Bxe4 Rf1 Rb7 Nf5 Rf7
>10. -7 13 4968281 e4 fxe4 Re8 Qg4 Bxe4 Rf1 Re5 Qh3 Qe8 Nf4
>10-> -7 16 5944242 e4 fxe4 Re8 Qg4 Bxe4 Rf1 Re5 Qh3 Qe8 Nf4
>11. -4 24 9099300 e4 fxe4 Re8 Qg4 Bxe4 Qh5 Rb7 Rd1 Re5 Ng4 Qe8
>11-> -4 31 11430433 e4 fxe4 Re8 Qg4 Bxe4 Qh5 Rb7 Rd1 Re5 Ng4 Qe8
>12. 8 81 30163019 e4 fxe4 Ne5 Qh3 Bxe4 Be2 Bxd5 Nxd5 Rf2 Bd3 Nxd3 Qxd3
> Rxb3 Rxa5
>12-> 8 95 35602128 e4 fxe4 Ne5 Qh3 Bxe4
>13. 31 188 71214188 e4 fxe4 Ne5 Qh3 Bxe4 Qg3 Nxc4 Rxc4
>13-> 31 215 81280627 e4 fxe4 Ne5 Qh3 Bxe4 Qg3 Nxc4 Rxc4
>14. 39 538 205827618 e4 fxe4
>
>(Scores here are + for a Black advantage, unlike Crafty: so the score at ply 14
>is 0.39 in Black's favor).
>
>So far I'm not sure if e4 is decisively the best move, or if there's a better
>defense to it. It is peculiar that both programs expect the PV e4 fxe4 Ne5 Qh3,
>but think (for a long while) that the score is even or + for White.
Gaviota
epdtest \e4.epd
109 1: 0.0 +0.56 Rb8-b7
586 2: 0.0 +0.52 Rb8-b7 Qe6-g4
3168 3: 0.0 +0.70 e5-e4 Qe6-g4 e4xf3 g2xf3
7891 4 0.1 +0.71 e5-e4 f3xe4 Nc6-e5 Ra4xa5
Bg6xe4
10980 4: 0.2 +0.71 e5-e4 f3xe4 Nc6-e5 Ra4xa5
Bg6xe4
21041 5 0.3 +0.65 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Rf8-e8 Ra4xa5 Bg6xe4
34149 5: 0.4 +0.65 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Rf8-e8 Ra4xa5 Bg6xe4
69219 6 0.7 +0.51 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Ne5xc4 b3xc4
117191 6: 1.2 +0.51 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Ne5xc4 b3xc4
213485 7 2.0 +0.50 e5-e4 f3-f4 Bg5xf4 Nd5xf4
Rf8xf4 Qe6-d5 Qd8-d7 Qd5-d2
363585 7: 3.1 +0.50 e5-e4 f3-f4 Bg5xf4 Nd5xf4
Rf8xf4 Qe6-d5 Qd8-d7 Qd5-d2
638646 8 5.1 +0.53 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Ne5xc4 b3xc4 Rf8-f2 Qh3-g3
1021307 8: 8.3 +0.53 e5-e4 f3xe4 Nc6-e5 Qe6-h3
Ne5xc4 b3xc4 Rf8-f2 Qh3-g3
1674486 9 12.8 +0.55 e5-e4 f3xe4 Rf8-e8 Qe6-g4
Re8xe4 Qg4-g3 Bg5-h4 Qg3-f3
Re4-e5
2369454 9: 17.8 +0.55 e5-e4 f3xe4 Rf8-e8 Qe6-g4
Re8xe4 Qg4-g3 Bg5-h4 Qg3-f3
Re4-e5
3471331 10 25.8 +0.31 e5-e4 f3xe4 Rf8-e8 Qe6-g4
Re8xe4 Qg4-e2 Qd8-e8 Ra1-e1
Nc6-e5 Ra4xa5 Ne5xc4 b3xc4
14856506 10: 129.0 +0.31 e5-e4 f3xe4 Rf8-e8 Qe6-g4
Re8xe4 Qg4-e2 Qd8-e8 Ra1-e1
Nc6-e5 Ra4xa5 Ne5xc4 b3xc4
21646524 11 186.7 +0.66 e5-e4 f3-f4 Bg5xf4 Nd5xf4
Rf8xf4 Qe6-d5 Bg6-f7 Qd5-d1
Bf7xc4 Ne3xc4 d6-d5 Nc4xa5
Nc6-e5
25428551 11: 219.1 +0.66 e5-e4 f3-f4 Bg5xf4 Nd5xf4
Rf8xf4 Qe6-d5 Bg6-f7 Qd5-d1
Bf7xc4 Ne3xc4 d6-d5 Nc4xa5
Nc6-e5
34619525 12 299.1 +0.39 e5-e4 f3-f4 Bg5xf4 Nd5xf4
Rf8xf4 Qe6-d5 Bg6-f7 Qd5-d1
Bf7xc4 Ne3xc4 d6-d5 Nc4xa5
Qd8-d7 b3-b4
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