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Subject: Re: Little test position

Author: Kurt Utzinger

Date: 12:06:12 10/17/03

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On October 17, 2003 at 10:30:33, Will Singleton wrote:

>This is from a blitz game Ktulu-Amateur, in which Amateur didn't find the key
>move (takes a few minutes).
>
>[D]7k/8/2R1pn2/1p1r2p1/p6p/P4P2/1P3BPP/7K b - - bm Rd1+

Rebel 12 DOS on P4 1.8 has great difficulties in finding the
winning move:

[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Pos 1"]
[Black "End 1"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "7k/8/2R1pn2/1p1r2p1/p6p/P4P2/1P3BPP/7K b - - 0 1"]

1..*

00:00:00  1.00  -0.74  1..Kg7 2.Rxe6 (2) (0.00)
00:00:00  1.10  -0.30  1..Re5 (1) (0.00)
00:00:00  1.11  0.09  1..Rd1+ 2.Bg1 (2) (0.00)
00:00:00  1.12  0.21  1..Rd2 2.Rxe6 Rxf2 3.Rxf6 Rxb2 (5) (0.00)
00:00:00  2.00  0.07  1..Rd2 2.Be1 Rxb2 3.Rxe6 (4) (0.00)
00:00:00  2.01  0.09  1..Rd1+ 2.Bg1 (2) (0.00)
00:00:00  3.00  -0.05  1..Rd1+ 2.Bg1 Re1 (3) (0.00)
00:00:00  4.00  -0.23  1..Rd1+ 2.Bg1 Re1 3.Rc5 (4) (0.00)
00:00:00  4.01  -0.13  1..Rd2 2.Be3 Rxb2 3.Bxg5 Rb1 (5) (0.00)
00:00:00  5.00  -0.13  1..Rd2 2.Be3 Rxb2 3.Bxg5 Rb1 4.Rc1 (6)
                       (0.00) (0)

00:00:00  6.00  0.05  1..Rd2 2.Bc5 Rxb2 3.Rxe6 Kg7 4.Re1 (6)
                       (0.00) (0)

00:00:00  7.00  -0.09  1..Rd2 2.Bg1 Kg7 3.Rxe6 Kg6 4.Bc5 Rxb2
                       (7) (0.00) (0)

00:00:00  8.00  -0.07  1..Rd2 2.Bg1 Rxb2 3.Rxe6 b4 4.Rxf6 bxa3
                       5.Rf7 (8) (0.00) (0)

00:00:00  9.00  0.05  1..Rd2 2.Bc5 Rxb2 3.Rxe6 Kg7 4.Re7 Kg6
                       5.Re6 Rd2 (9) (0.00) (0)

00:00:01 10.00  -0.27  1..Rd2 2.Bg1 Re2 3.Rb6 Re5 4.Bd4 Re1
                       5.Bg1 Re5 6.Bd4 Re1 7.Bg1 (12) (0.00) (0)

00:00:02 10.05  -0.24  1..Re5 2.Kg1 Kg7 3.Bd4 Rd5 4.Be3 Kf7
                       5.Rc7 Kg6 6.Kf2 (10) (0.00) (1)

00:00:05 11.00  -0.18  1..Re5 2.Kg1 Kg7 3.Bd4 Rd5 4.Bc3 e5
                       5.Kf2 Nd7 6.Ke3 Nc5 (11) (6.00) (3)

00:00:09 12.00  -0.17  1..Re5 2.Kg1 Kg7 3.g3 h3 4.Bd4 (6) (2.50)
00:00:23 13.00  -0.15  1..Re5 2.Kg1 Kg7 3.Bd4 Rd5 4.Bc3 e5
                       5.Bd4 exd4 6.Rxf6 (10) (2.53) (13)

00:00:55 14.00  -0.15  1..Re5 2.Kg1 Kg7 3.g3 h3 4.Bd4 (6) (2.45)
00:01:08 14.02  -0.08  1..Rd1+ 2.Bg1 Nh5 3.Rxe6 Nf4 4.Re5 h3
                       5.g3 Nd3 6.Re2 (10) (2.45) (58)

00:01:44 15.00  0.00  1..Rd1+ 2.Bg1 Nh5 3.Rxe6 Nf4 4.Re4 (6)
                       (2.12) (83)


Positions                :     141.036.275
Nodes per second         :         783.534

Extensions (checks)      :               0 (0%)
Extensions (captures)    :               0 (0%)
Extensions (king safety) :               0 (0%)
Extensions (on depth)    :               0 (0%)
Extensions (remaining)   :               0 (0%)
Extensions (total)       :               0 (0%)

Hash Table               : 6.664.686  5.324.738  (99%)
Average depth            : 18
Deepest depth            : 40





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