Author: Eelco de Groot
Date: 13:20:27 02/19/02
Go up one level in this thread
On February 19, 2002 at 15:21:14, Uri Blass wrote:
>On February 19, 2002 at 14:19:06, Thomas Lagershausen wrote:
>
>>Rebel Centuy 4 - Loek van Wely
>>[D]r5k1/2q2pbp/p1b1p1p1/8/Pp2p3/4N2Q/1PPR1PPP/3R2K1 w - - 0 1
>>
>>A wonderfull move.Something unbelievable.A real pawnsac for attack.Worldchampion
>>Junior 7 couldn´t attack so strong the gm.
>>
>>Analysis by Junior 7(Athlon 1,5 Ghz):
>>
>>23.a5 Lxb2
>> ³ (-0.37) Tiefe: 3 00:00:00
>>23.b3 Tc8
>> = (0.03) Tiefe: 3 00:00:00
>>23.b3 Tc8 24.Dh4
>> = (-0.16) Tiefe: 6 00:00:00 1kN
>>23.Dg3 Le5 24.Dh4 Lxb2 25.Td8+ Txd8 26.Txd8+ Kg7
>> = (0.02) Tiefe: 6 00:00:00 5kN
>>23.Dg3 Le5 24.Dh4 Lxb2 25.Td8+ Kg7 26.Txa8 Lxa8 27.Dd8
>> = (-0.04) Tiefe: 9 00:00:00 36kN
>>23.b3 Lc3 24.Td6 Le5 25.T6d2 Lf4 26.Dh4
>> = (-0.01) Tiefe: 9 00:00:00 52kN
>>23.b3 Lc3 24.Dg3 Dxg3 25.Td8+ Txd8 26.Txd8+ Kg7 27.hxg3 Kf6 28.Td6 Lb7 29.Td7
>> = (0.01) Tiefe: 12 00:00:00 341kN
>>23.b3 Lf6 24.Dg3 Dxg3 25.hxg3 Kf8 26.Sc4 Lc3 27.Td6 Ld5 28.Td7 Lxc4
>> = (0.09) Tiefe: 15 00:00:04 5005kN
>>23.b3 Lf6 24.Dg3 Dxg3 25.hxg3 Kf8 26.Td6 Tc8 27.Sc4 Ke7 28.Kh2
>> = (0.09) Tiefe: 17 00:00:25 26225kN
>>23.b3 Lf6 24.Dg3 Dxg3 25.hxg3 Tc8 26.Sc4 Kg7 27.Sd6 Tc7 28.Kh2 Lc3
>> = (0.14) Tiefe: 18 00:02:16 137285kN
>>23.b3 Lf6 24.Dg3 Dxg3 25.hxg3 Tc8 26.Sc4 Kf8 27.Td6 Le7
>> = (0.16) Tiefe: 19 00:04:51 289489kN
>
>It is not about tactics
>Junior7 gives the position after 27.Rg8+ smaller score than 0.16
>
>I am not sure if Rebel's move is objectively the best move.
>
>I believe that programs that cannot find it are going to find it if you increase
>the material value of the queen in their evaluation.
>
>Uri
I think it is possible that with a little more time Rebel would also have
switched to 23.b3. I tested it with Rebel Century 2 and it switches to 23.b3 but
this after about 7 and a half minutes, Celeron 500 and timesharing so the Athlon
1600 should have reached that depth also. So maybe Century 4 does not switch to
23.b2-b3 at thirteen ply.
Century 2.0
00:00 03.00 1.39 1.b3 Bc3 2.Rd6
00:00 05.00 1.20 1.b3 Bc3 2.Rd6 Be5 3.R6d2
00:00 06.00 0.59 1.b3 Bc3 2.Re2 Rd8 3.Rxd8+ Qxd8 4.Qh6
00:01 06.11 1.16 1.Qh4 Bxa4 2.Qxe4 Rb8 3.Nc4 Bc6
00:01 07.00 0.68 1.Qh4 Bxb2 2.Rd8+ Rxd8 3.Rxd8+ Kg7 4.c3 Bxc3 5.Nd1+ Bxa4
00:05 08.00 0.62 1.Qh4 Bxb2 2.c3 Bxc3 3.Rd8+ Rxd8 4.Rxd8+ Kg7 5.Nc4+
00:15 09.00 0.40 1.Qh4 Bxb2 2.Ng4 Re8 3.a5 Bg7 4.Nf6+ Bxf6 5.Qxf6 Qxa5
00:15 09.01 0.41 1.b3 Bc3 2.Qg3 Qxg3 3.Rd8+ Rxd8 4.Rxd8 Kg7 5.hxg3 f6
00:29 10.00 0.44 1.b3 Bc3 2.Re2 Rd8 3.Rxd8+ Qxd8 4.Qh6 Bg7
00:32 10.01 0.44 1.Qh4
00:35 10.01 0.67 1.Qh4 Bxb2 2.Rd8+ Rxd8 3.Rxd8+ Kg7 4.Ng4 h5 5.Qg5 hxg4 6.Qh4
Qxd8
01:03 11.00 0.80 1.Qh4 Bxb2 2.Rd8+ Rxd8 3.Rxd8+ Kg7 4.Ng4 h5 5.Qg5 hxg4 6.Qh4
02:14 12.00 0.80 1.Qh4 Bxb2 2.Rd8+ Rxd8 3.Rxd8+ Kg7 4.Ng4 h5 5.Qg5 hxg4 6.Qh4
06:39 13.00 0.65 1.Qh4 Bxb2 2.Rd8+ Rxd8 3.Rxd8+ Kg7 4.Ng4 Qf4
07:39 13.01 0.67 1.b3 Bc3 2.Qg3 Qxg3 3.Rd8+ Rxd8 4.Rxd8+ Kg7 5.hxg3 h6
22:43 14.00 0.90 1.b3 Bc3 2.Qg3 Qxg3 3.Rd8+ Rxd8
Q5T immediately plays Qh4 at three ply deep but expects a line that is totally
different from the game, I haven't looked and frankly I don't dare... It thinks
it is almost a piece ahead. Crazy woodpushing piece of sand it is. Century 2.0
on the other hand sees Black's Queen sacrifice 26. ...Qf4, 7 plies earlier,
already in the 13 ply iteration!
Q5T:
[D]r5k1/2q2pbp/p1b1p1p1/8/Pp2p3/4N2Q/1PPR1PPP/3R2K1 w - -
00:00 01.00 -3.78 1.Rd7 Bxd7
00:00 01.02 1.13 1.Rd6 Bxb2
00:00 01.11 1.80 1.b3
00:00 02.00 1.67 1.b3 f5
00:00 02.01 1.73 1.c3 Bxa4
00:00 02.03 1.73 1.Qg3
00:00 02.03 1.97 1.Qg3 Qxg3 2.hxg3 Bxb2 3.Nc4
00:00 03.00 1.84 1.Qg3 Qxg3 2.hxg3 Bxa4 3.Nc4 f6
00:00 03.02 2.00 1.b3 Bc3 2.Rd6
00:00 03.17 2.08 1.Qh4 Bxa4 2.Rd8+ Rxd8
00:00 04.00 1.95 1.Qh4 Re8 2.Nc4 Bxa4 3.Qxe4
00:00 05.00 1.96 1.Qh4 f6 2.Ng4 Rf8 3.Nh6+ Bxh6
00:00 06.00 1.98 1.Qh4 Re8 2.b3 f6 3.Rd6 h5
00:01 07.00 2.00 1.Qh4 f6 2.Rd4 Rb8 3.Ng4 g5 4.Nh6+
Kh8 (0)
00:04 08.00 1.92 1.Qh4 Re8 2.b3 f6 3.Rd6 Bf8 4.R6d4
00:11 09.00 1.97 1.Qh4 Rf8 2.Rd8 h5 3.Rxf8+ Bxf8
4.Rd8 Bd7 (5)
00:28 10.00 1.75 1.Qh4 Re8 2.b3 Bc3 3.Ng4 e3 4.Nh6+
Kh8 5.fxe3 (16)
02:17 11.00 1.93 1.Qh4 h5 2.b3 Kh7 3.g4 Qf4 4.Qg3+
Qf3 5.Qxf3 exf3 (51)
06:16 12.00 1.95 1.Qh4 h5 2.b3 Kh7 3.g4 Bc3 4.Rd6
Be5 5.gxh5 (186)
17:46 13.00 1.69 1.Qh4 Rf8 2.b3 f5 3.Rd8 h6 4.Rxf8+
Crafty 18.10, also timesharing, in analysis mode plays 23.b2-b3:
White(23): analyze
clearing hash tables
time surplus 0.00 time limit 30.00 (3:30)
nss depth time score variation (1)
7-> 3.34 0.21 23. b3 Bc3 24. Re2 Rd8 25. g4 Rd4 26.
g5 Rxd1+ 27. Nxd1
8 3.80 0.18 23. b3 Bc3 24. Re2 Rd8 25. g4 Be5 26.
Red2 Rxd2 27. Rxd2
8-> 9.64 0.18 23. b3 Bc3 24. Re2 Rd8 25. g4 Be5 26.
Red2 Rxd2 27. Rxd2
9 11.63 0.23 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qh6 Qf6 27. Nc4 g5 28. Qh5
9-> 26.28 0.23 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qh6 Qf6 27. Nc4 g5 28. Qh5
10 29.93 0.14 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 a5 27. h3 Bd4 28. Nc4 Qd5
10-> 1:28 0.14 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 a5 27. h3 Bd4 28. Nc4 Qd5
11 1:34 0.17 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 a5 27. h4 e5 28. Qg4 Qf6 29.
Nc4
11-> 2:29 0.17 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 a5 27. h4 e5 28. Qg4 Qf6 29.
Nc4
12 3:03 0.21 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 Bd5 27. h4 Bc6 28. Qf4 Qf6
29. Qxf6 Bxf6 30. g3
12-> 6:01 0.21 23. b3 Bc3 24. Re2 Rd8 25. Rxd8+ Qxd8
26. Qg3 Bd5 27. h4 Bc6 28. Qf4 Qf6
29. Qxf6 Bxf6 30. g3
13 7:33 0.21 23. b3 Bc3 24. Re2 Rd8 25. Qg4 Qe7
26. Qf4 Rxd1+ 27. Nxd1 Bd4 28. Rd2
e5 29. Qg4 f5 30. Qh3
13-> 12:44 0.21 23. b3 Bc3 24. Re2 Rd8 25. Qg4 Qe7
26. Qf4 Rxd1+ 27. Nxd1 Bd4 28. Rd2
e5 29. Qg4 f5 30. Qh3
14 25:03 0.40 23. b3 Bc3 24. Qg3 Qxg3 25. Rd8+ Kg7
26. hxg3 Rxd8 27. Rxd8 Be5 28. Ng4
Bc3 29. Rd6 Bb7 30. Rd7 Bd5
Congratulations to the Rebel team! I just looked at a few snapshots of the
endgame, that didn't look easy to win at all, certainly not against Loek who has
good technique? Just those few positions I've seen it looked like a fine win in
the ending for Rebel!
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