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[Matthew R. Brades]

Most engines evaluate this pretty high anyway, but which can find David Bronstein's move, Rxd5!!

[D]q1r2bk1/p2n3p/1p3pp1/2rb2N1/2p2Q2/1P4P1/PB3PBP/3RR1K1 w - - 2 23

Here is FruitFly 1.1 'Blackberry's opinion:

Score : +4.36
Depth : 15/1
Time : 00:03:08
Nodes : 31260000
N/sec : 166129
24. Qh4 fxg5 25. Qd4 c3 26. Bxc3 Kf7 27. Bxd5 Rxd5 28. Qxd5 Qxd5 29. Rxd5 Rc7 30. Kg2 Be7 31. h3 Nf6 32. Bxf6 Bxf6 33. Kf3

It's not hugely quick, as my GCC-4.6 is producing wierd results (GCC-4.0 does about 185knps on my comp from the starting position, whereas GCC-4.6 does about 50knps. As Julien put it 'Snail Pred', only fruitfly)

DiscoCheck 3.6 'Boney M' finds it quickly

Score : +2.80
Depth : 11/2
Time : 00:00:06
Nodes : 503868
N/sec : 81269
24. Rxd5 Rxd5 25. bxc4 fxg5 26. Qe3 Re8 27. Bxd5 Qxd5 28. cxd5 Rxe3 29. Rxe3

Quicker than stockfish, in fact.

Score : +3.79
Depth : 17/1
Time : 00:00:33
Nodes : 1811896
N/sec : 53979
24. Rxd5 Rxd5 25. bxc4 fxg5 26. Qe3 Re8 27. Bxd5 Qxd5 28. cxd5 Rxe3 29. fxe3 Bb4 30. Rb1 Kf7 31. e4 Bd6 32. Kf2 Ke7 33. Ke3 Ne5 34. Bxe5 Bxe5

Matthew:out
_________________
Well, that's that.

Account. Gone.