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Dabbaba was allowed up to an hour pr. move on a Pentium II 233 Mhz.
A chess variant called nightrider chess was played. The knights make long moves in this variant.
Benjamin Goods uscf chess rating is somewhere in the range of 1500-1600, and he had a hard time in this difficult variant against the computer. You have to be aware right from the beginning: 1.e4?,Nxe4!
Here is the first game. (a positive score means Dabbaba thinks white has the best position)
Game 1.
White: Benjamin Good
------------- information on Dabbabas move ---------------
whites seconds Dabbabas score depth Dabbabas expected
move used move (next move) line
----------------------------------------------------------------------
1. d2-d4 2119 d7-d5 8 8,1 e2e3 c8d7 g1e2
2. e2-e3 3328 Nb8-d7 3 7,23 g1d7 c8d7
Dabbaba now forces exchange of a couple of nightriders now because
of the threats 3.-,Nxa1 and 3.-,Nxg1.
3. Ng1xd7 3470 Bc8xd7 24 8,10 b1h4 a8b8 h4d2
White thinks he gains a pawn now, but misses blacks reply.
(look at Dabbabas expected line: 4.Nh4,Rb8 - attack and defense of b7!)
4. Nb1xd5 3291 Bd7-g4! -7 8,17 d5c7 d8c7 d1g4
White should now capture on c7 to get a pawn more for the nightrider.
5. Qd1xg4? 1608 Qd8xd5 -166 8,1 g4d1 e7e5
After 5 moves there is only one nightrider left.
But that is enough to make this game quite special.
After this game I have adjusted the value of the nightrider from
550 to 625, so the position-evaluation in this game would have been
75 lower.
6. c2-c4 3284 Qd5-a5+ -128 8,23 e1d1 g8f6
If now 7.Bd2???,Qxd2# - Ng8 covers d2!
White did not see that when he played 6.c4.
The position of the white king becomes bad now.
7. Ke1-d1 3287 e7-e5 -191 7,23 f1d3 g8f6 g4e2
8. Qg4-f3 1670 Ng8-c6 -146 7,1 f1d3 e5d4 e3d4
9. Bc1-d2 1467 Bf8-b4! -269 8,1 d2c1 a8d8 d4d5
Dabbaba considers 10.Bc1 as the best move, but who wants to play that?
After 10.Qe2 black captures twice on d2 and wins a pawn on d4.
After 10.d5,Ne7 11.Bxb4,Qxb4 black threats on both b2 and h1.
10. Bd2xb4 2179 Qa5xb4 -294 8,1 d1c2 e5d4 f1d3
White could consider 11.Qe2 to cover b2, and if black plays 11.-,e5xd4
white can recapture with check. But instead black plays 11.-,0-0-0 with
big pressure on d4 (12.d5??,Nxe2). White can try 12.Qg4+,Kb8 (if now 13.Qxg7?,Qxb2 14.Rc1,Nxd4! with mate in 6 according to Dabbaba; fx
15.Bd3,Nf3!), but if Dabbaba plays against itself from here this line occurs: 13.Kc2,exd4 14.Qxg7,Rhg8 15.a3,Rxg7 16.axb4,Nxb4+ 17.Kb3,Nxf2 18.Rg1,dxe3 and white can resign.
11. b2-b3 1221 e5xd4 -319 7,1 e3d4 c6d4
Dabbaba also considered 11.-,Ng8 with matethreat on d2...
12. Qf3-e4+ 1683 Nc6-e7 -657 8,1 g2g3 e8c8
White could now try 13.g3,0-0-0 (threats -,Nc3+) 14.Bh3+,Kb8 15.Kc2,Qc3+ 16.Kb1,Qxe3+! (discovered check by Ne7!)
Other lines are not much better.
13. e3xd4? 3303 0-0 -730 7,22 f1d3 e7c3
Unpins Ne7 that threats on c3 and h1 now. Game over.
Dabbaba could also have played 13.-,0-0-0 14.Qg4+,Kb8 15.g3,Qc3!
(better than 15.-,Rxd4 16.Qxd4,Nf5+ 17.Qe3)
14. Bf1-d3 3277 Ne7-c3+ -677 7,35 ----
White could mate if black captured Rh1.
15.Resigns.
max nodes pr. move: 18728 at move 11.
min nodes pr. move: 17145 at move 12.
Last modified: Monday, December 22, 2008
