Author: Jon Dart
Date: 20:57:41 07/20/04
From a test game between two Arasan versions:
[D] 2R2b1r/3nkp2/B2pp1p1/1N4Pn/P3P3/4BP2/1r5q/3QK1R1 w - -
In the actual game, White played Qd3 and lost.
White must play Nd4 or Na7 here, after which Crafty expects a
draw by repetition. Crafty analysis (not the latest version):
middle-game phase
clearing hash tables
time surplus 0.00 time limit 10:00 (10:00)
depth time score variation (1)
6 0.15 0.90 21. Rg4 d5 22. Bg1 Qh3 23. Bd4 Qh1+
24. Rg1
6-> 0.17 0.90 21. Rg4 d5 22. Bg1 Qh3 23. Bd4 Qh1+
24. Rg1
7 0.36 1.05 21. Rg4 Ng7 22. Bb7 Qe5 23. f4 Rh1+
24. Bg1 Rxg1+ 25. Rxg1 Qxf4
7-> 0.45 1.05 21. Rg4 Ng7 22. Bb7 Qe5 23. f4 Rh1+
24. Bg1 Rxg1+ 25. Rxg1 Qxf4
8 0.80 1.05 21. Rg4 Ng7 22. Bb7 Qe5 23. f4 Rh1+
24. Bg1 Rxg1+ 25. Rxg1 Qxf4
8-> 1.00 1.05 21. Rg4 Ng7 22. Bb7 Qe5 23. f4 Rh1+
24. Bg1 Rxg1+ 25. Rxg1 Qxf4
9 2.30 -- 21. Rg4
9 2.72 0.37 21. Rg4 Qh1+ 22. Bg1 d5 23. Nd4 Bg7
24. Rxh8 Bxh8 25. Nc6+ Kf8 26. exd5
exd5 27. Qxd5
9-> 5.89 0.37 21. Rg4 Qh1+ 22. Bg1 d5 23. Nd4 Bg7
24. Rxh8 Bxh8 25. Nc6+ Kf8 26. exd5
exd5 27. Qxd5
10 8.06 ++ 21. Rg4!!
10 18.08 0.89 21. Rg4 f5 22. Bg1 Qe5 23. Bd4 Ng3
24. Re8+ Kf7 25. Rh4 Re2+ 26. Qxe2
Nxe2 27. Bxe5 Rxh4
10-> 21.55 0.89 21. Rg4 f5 22. Bg1 Qe5 23. Bd4 Ng3
24. Re8+ Kf7 25. Rh4 Re2+ 26. Qxe2
Nxe2 27. Bxe5 Rxh4
11 24.92 -- 21. Rg4
11 46.76 -1.08 21. Rg4 f5 22. exf5 exf5 23. Nxd6 Bg7
24. Rc7 Bc3+ 25. Rxc3 fxg4 26. Nc8+
Rxc8 27. Rxc8 Qh1+ 28. Bf1 gxf3
11 1:44 -0.51 21. Qd3 Bg7 22. Na7 Rxc8 23. Nxc8+
Kd8 24. Nxd6 Nf4 25. Nxf7+ Ke8 26.
Nd6+ Kf8 27. Qd1 Ng2+ 28. Rxg2 Qxg2
11 3:53 0.00 21. Nd4 Qh4+ 22. Kf1 Qh3+ 23. Ke1 Qh4+
11-> 4:18 0.00 21. Nd4 Qh4+ 22. Kf1 Qh3+ 23. Ke1 Qh4+
12 6:32 0.00 21. Nd4 Qh4+ 22. Kf1 Qh3+ 23. Ke1 Qh4+
12-> 7:32 0.00 21. Nd4 Qh4+ 22. Kf1 Qh3+ 23. Ke1 Qh4+
My latest Arasan version:
ply 1. Qd4 0 seconds. score: +2.55 9 nodes.
ply 1. Qd4 0 seconds. score: +2.55 55 nodes.
ply 2. a5 0 seconds. score: +2.16 331 nodes.
ply 2. a5 0 seconds. score: +2.16 575 nodes.
ply 3. Bd4 0 seconds. score: +1.98 2580 nodes.
ply 3. Bd4 0 seconds. score: +1.98 3591 nodes.
ply 4. Rf1 0 seconds. score: +1.56 7881 nodes.
ply 4. Rg4 0 seconds. score: +2.16 10309 nodes.
ply 4. Rg4 0 seconds. score: +2.16 10929 nodes.
ply 5. Rg4 0 seconds. score: +1.89 31482 nodes.
ply 6. Rg4 0 seconds. score: +2.36 87142 nodes.
ply 7. Rg4 1 seconds. score: +2.48 459298 nodes.
ply 8. Rg4 3 seconds. score: +2.31 1413876 nodes.
ply 9. Rg4 14 seconds. score: +1.97 6736531 nodes.
ply 10. Rg4 43 seconds. score: +1.50 21383833 nodes.
ply 11. Rg4 125 seconds. score: +1.50 61642119 nodes.
ply 11. Qd3 169 seconds. score: -0.08 83907853 nodes.
ply 11. Qd3 218 seconds. score: -0.08 108544062 nodes.
ply 12. Rg4 263 seconds. score: -0.44 130810071 nodes.
ply 12. Rf1 296 seconds. score: -0.30 148652322 nodes.
ply 12. Nd4 407 seconds. score: -0.25 205648751 nodes.
ply 12. Nd4 465 seconds. score: -0.25 236943131 nodes.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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