Author: Jon Dart
Date: 18:20:37 10/23/05
This the Arasan-Hiarcs game from CCT-Blitz:
[Event "CCT Blitz 2005"]
[Site "Internet Chess Club"]
[Date "2005.10.22"]
[Round "4"]
[White "ArasanX"]
[Black "Hiarcs8x"]
[Result "0-1"]
[Opening "Sicilian: Taimanov (Bastrikov) variation"]
[ECO "B47"]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8.
O-O Bc5 9. Nb3 Ba7 10. Bg5 Ne5 11. Bxf6 gxf6 12. Qh5 b5 13. Qh4 Ke7 14. Rfd1
Bb7 15. Nd4 h5 16. Qf4 h4 17. a4 hxg3 18. hxg3 b4 19. Na2 Bc5 20. c3 bxc3
21. Nxc3 Rag8 22. Rac1 Qb6 23. Nce2 d6 24. Rb1 a5 25. Qd2 f5 26. exf5 Bxg2
27. Kxg2 Qb7+ 28. f3 {White resigns} 0-1
Arasan's score took a sudden huge dive after 26.. Bxg2, but White is trouble
earlier. 25 .. f5 is interesting. 26. exf5 is a mistake but I don't think
White has a good move. This is the position:
[D] 6rr/1b2kp2/1q1ppp2/p1b1n3/P2NP3/6P1/1P1QNPB1/1R1R2K1 b - -
I ran this through Crafty 19.17 (latest I have) and got this
result after 5 minutes, with only a small advantage to Black:
12-> 4:41 -0.30 1. ... Ng4 2. Nc1 Rh2 3. Ncb3 Rxg2+
4. Kxg2 Bxe4+ 5. f3 Bxb1 6. Rxb1 Rh8
7. fxg4 Qb7+ 8. Nf3 Qxb3 9. Qxa5
Arasan itself prefers ..Ba6 with a solid + score for Black:
ply 1. Bxd4 0 seconds. score: -0.69 2 nodes.
ply 1. Kf8 0 seconds. score: +0.22 60 nodes.
ply 2. Kf8 0 seconds. score: +0.13 364 nodes.
ply 3. Kf8 0 seconds. score: +0.31 1016 nodes.
ply 4. Kf8 0 seconds. score: +0.22 3694 nodes.
ply 5. Ba6 0 seconds. score: +0.59 28868 nodes.
ply 6. Ba6 0 seconds. score: +0.78 53525 nodes.
ply 7. Ba6 0 seconds. score: +1.25 116154 nodes.
ply 8. Ba6 1 seconds. score: +0.97 445918 nodes.
ply 9. Ba6 2 seconds. score: +1.44 1101516 nodes.
ply 10. Ba6 8 seconds. score: +1.25 3700958 nodes.
ply 11. Ba6 17 seconds. score: +1.53 7332861 nodes.
ply 12. Ba6 46 seconds. score: +1.70 18992859 nodes.
ply 13. Ba6 106 seconds. score: +1.84 44753926 nodes.
ply 14. Ba6 300 seconds. score: +1.69 129076825 nodes.
Pharaon 3.3 likes Ba6 early on but eventually switches to f5 with
a large + score:
7. 153 1 307525 Ba6 Nf4 Ke8 Rbc1 Nd3 Nxd3 Bxd4 Rc8+
7-> 153 1 457270 Ba6 Nf4 Ke8 Rbc1 Nd3 Nxd3 Bxd4 Rc8+
8. 158 1 828594 Ba6 Nc1 Bc4 Qc3 Ke8 Ra1 Rg4 Rb1 Bxd4
8-> 158 2 1250597 Ba6 Nc1 Bc4 Qc3 Ke8 Ra1 Rg4 Rb1 Bxd4
9. 154 4 2409450 Ba6 Nf4 Ke8 b3 Rg5 Rbc1 Nd3 Nxd3 Bxd4 Rc8+
9. 154 7 4406335 Rg4!
9. 154 7 4512233 Ba6 Nf4 Ke8 b3 Rg5 Rbc1 Nd3 Nxd3 Bxd4 Rc8+
9-> 154 11 6714922 Ba6 Nf4 Ke8 b3 Rg5 Rbc1 Nd3 Nxd3 Bxd4 Rc8+
10. 152 14 8291307 Ba6 Nf4 Ke8 b3 Rg5 Rbc1 Nd3 Nxd3 Bxd4 Qf4 Bxd3 Rxd3
10. 152 16 9592359 Rg4!
10. 220 29 17179076 Rg4 Nf4 f5 b4 axb4 exf5 Bxg2 Kxg2 Bxd4 Qxd4 Qc6+
Kf1 Rh1+ Ke2 Qf3+ Kd2 Qxd1+ Rxd1 Nf3+ Kd3 Nxd4 Rxh1
Nxf5
10-> 220 35 21001320 Rg4 Nf4 f5 b4 axb4 exf5 Bxg2 Kxg2 Bxd4 Qxd4 Qc6+
Kf1 Rh1+ Ke2 Qf3+ Kd2 Qxd1+ Rxd1 Nf3+ Kd3 Nxd4 Rxh1
Nxf5
11. 239 63 38514047 Rg4 Qe3 Ba6 Bf1 f5 f4 fxe4 fxe5 dxe5 b4 Bxd4 Nxd4
exd4 Rxd4 axb4
11-> 239 85 52404994 Rg4 Qe3 Ba6 Bf1 f5 f4 fxe4 fxe5 dxe5 b4 Bxd4 Nxd4
exd4 Rxd4 axb4
12. 153 127 77489633 Rg4 Qe3 Ba6 Nf4 Rg5 Qd2 Ke8 b3
12. 153 141 85660242 f5!
12. 251 192 115324429 f5 b4 axb4 exf5 Bxg2 Kxg2 Ng4 Qd3 Rh2+ Kg1 Nxf2
Qd2 Rgh8 Qg5+ Ke8 Qe7+
12-> 251 225 138634178 f5 b4 axb4 exf5 Bxg2 Kxg2 Ng4 Qd3 Rh2+ Kg1 Nxf2
Qd2 Rgh8 Qg5+ Ke8 Qe7+
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