Author: Enrique Irazoqui
Date: 07:41:27 10/22/99
Go up one level in this thread
On October 22, 1999 at 08:18:33, Bernhard Bauer wrote:
>On October 22, 1999 at 06:39:37, Enrique Irazoqui wrote:
>
>>On October 22, 1999 at 05:04:42, Thorsten Czub wrote:
>>
>>>On October 21, 1999 at 23:01:15, Laurence Chen wrote:
>>>
>>>>This does not surprise me at all. I've seen this happens with other engines as
>>>>well. I don't think it is fair to pick on Fritz and accuse it that it's stupid
>>>>in analysis or it's very dumb, but the user behind it. It's like the old
>>>>saying, the blind leads the blind and they both fall off into the ditch.
>>>>Therefore, this is a warning sign to all users who relies solely and takes any
>>>>computer chess analysis as the ULTIMATE truth. I personally never take any chess
>>>>analysis to its face value, I always play another move, or another ply and see
>>>>if the evaluation changes dramatically. If it remains the same, then I know that
>>>>the assessment is correct, if it changes dramatically, then it's because of the
>>>>horizon effect which all chess engines suffer, and I would then conclude that
>>>>the chess engine is off in its evaluation. To someone new to chess engine this
>>>>may be a new revelation. Therefore the moral is one should never trust any
>>>>analysis of chess engines without further investigation.
>>>>Laurence
>>>
>>>When i have a car and it says there is enough fuel in the tank,
>>>i will NOT drive to a petrol-station.
>>>If this makes me suddenly stand without fuel .... i call this a
>>>shit car. and will bring it to a garage to repair it.
>>>
>>>I know enough programs who don't change the evaulation
>>>in such positions.
>>>i better use THESE programs.
>>>and call the others dump.
>>
>>This is like saying that you can't trust prepocessors, null movers and selective
>>searchers because they have holes. The other side of the coin is that you can
>>trust them better because they go so much deeper and are likely to see more in
>>most cases. Try this position and see how Fritz, Tiger, Nimzo and Crafty will
>>play Kf2, sticking to it forever with a 0.00 evaluation. Then force Qe1+ and
>>suddenly they see that white wins. There are many examples like this.
>>
>>Enrique
>>
>>[Event ""]
>>[Site "?"]
>>[Date "1934.??.??"]
>>[Round "?"]
>>[White "Kasparjan, G."]
>>[Black ""]
>>[Result "1-0"]
>>[Annotator ""]
>>[SetUp "1"]
>>[FEN "8/2B1Q3/8/6pp/7k/7P/6P1/2q3K1 w - - 0 5"]
>>[PlyCount "9"]
>>[EventDate "1934.??.??"]
>>
>>5. Qe1+ $3 Qxe1+ 6. Kh2 Qf2 7. Bd6 $1 Qf4+ 8. g3+ Qxg3+ 9. Bxg3# 1-0
>
>Here we talk about analysis. So time is not so much an issue. You may choose
>to use a no-null-mover and give it some more time to reach the same depth.
This case is not a matter of time either. Look below at the analysis by Crafty
16.18 and Shredder 3 with the starting position and after forcing Qe1 QxQ. Only
1 or 2 plies deeper they see almost instantly what they didn't see before in a
long search. This is what this kind of positions have in common with Thorsten's.
Null movers and root processors blunder this way every now and then.
If for this reason you can't trust Fritz for analysis, you can't trust Tiger,
Nimzo, Shredder, Crafty and a long etcetera.
Enrique
Kasparjan,G - [+4040.22h1h4
8/2B1Q3/8/6pp/7k/7P/6P1/2q3K1 w - - 0 1
Analysis by Crafty 16.18:
5.Kh2 Qg1+ 6.Kxg1
+- (4.00) depth: 1 00:00:00
= (0.00) depth: 2 00:00:00
5.Kf2 Qf1+ 6.Kxf1
² (0.40) depth: 2 00:00:00
= (0.00) depth: 18 00:01:30 13568kN, tb=1154
(Tiger 12.0, Cadaques 22/10/1999)
__________________________________________
Kasparjan,G - [+4040.22h1h4
8/2B5/8/6pp/7k/7P/6P1/4q1K1 w - - 0 1
Analysis by Crafty 16.18:
6.Kh2 Qf2 7.Bd6 Qg1+ 8.Kxg1 g4 9.Be7+ Kg3 10.hxg4 hxg4 11.Bd6+ Kh4 12.Kf2 Kh5
13.Ke3 Kg5 14.Ke4 Kg6
-+ (-6.15) depth: 1 00:00:00
+- (4.13) depth: 12 00:00:03 404kN, tb=144
(Tiger 12.0, Cadaques 22/10/1999)
__________________________________________
new game!
[Event "?"]
[Site "?"]
[Date "1999.10.22"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
new game!
position:
[FEN "8/2B1Q3/8/6pp/7k/7P/6P1/2q3K1 w - -"]
opening book: D:\Shredder3\shredder.lbk
endgame databases: 0
8/2B1Q3/8/6pp/7k/7P/6P1/2q3K1 w - -
+---+---+---+---+---+---+---+---+
8 | |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
7 |:::| | B | | Q | |:::|
+---+---+---+---+---+---+---+---+
6 | |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
5 |:::| |:::| |:::| |*P*|*P*
+---+---+---+---+---+---+---+---+
4 | |:::| |:::| |:::| |*K*
+---+---+---+---+---+---+---+---+
3 |:::| |:::| |:::| |:::| P
+---+---+---+---+---+---+---+---+
2 | |:::| |:::| |:::| P |:::
+---+---+---+---+---+---+---+---+
1 |:::| |*Q*| |:::| | K |
+---+---+---+---+---+---+---+---+
a b c d e f g h
1.01 0:00.03 +3.23++ 1.Kf2 (1) 0.0
1.01 0:00.03 +3.74++ 1.Kf2 (2) 0.0
1.01 0:00.03 +3.74 1.Kf2 (3) 0.0
1 -> 0:00.03 +3.74 1.Kf2 (7) 0.1
2.01 0:00.04 +3.57 1.Kf2 Qc2+ 2.Kf1 Qd3+ 3.Qe2 Qb1+ 4.Qe1+ Qxe1+ 5.Kxe1
(472) 11.8
2.02 0:00.04 +3.62++ 1.Kh2 (497) 11.0
2.02 0:00.04 +3.64 1.Kh2 Qf1 (519) 11.0
2 -> 0:00.04 +3.64 1.Kh2 Qf1 (522) 10.6
3.01 0:00.05 0.00-- 1.Kh2 (564) 10.8
3.01 0:00.05 0.00 1.Kh2 Qh1+ 2.Kxh1 (607) 11.2
3 -> 0:00.05 0.00 1.Kh2 Qh1+ 2.Kxh1 (717) 12.8
4.01 0:00.06 0.00 1.Kh2 Qh1+ 2.Kxh1 (772) 12.8
4 -> 0:00.06 0.00 1.Kh2 Qh1+ 2.Kxh1 (784) 12.4
5.01 0:00.06 0.00 1.Kh2 Qh1+ 2.Kxh1 (833) 12.8
5 -> 0:00.06 0.00 1.Kh2 Qh1+ 2.Kxh1 (922) 13.5
6.01 0:00.07 0.00 1.Kh2 Qh1+ 2.Kxh1 (1.264) 18.0
6 -> 0:00.07 0.00 1.Kh2 Qh1+ 2.Kxh1 (1.673) 22.0
7.01 0:00.08 0.00 1.Kh2 Qh1+ 2.Kxh1 (2.069) 25.8
7 -> 0:00.08 0.00 1.Kh2 Qh1+ 2.Kxh1 (2.408) 28.0
8.01 0:00.09 0.00 1.Kh2 Qh1+ 2.Kxh1 (2.813) 31.2
8 -> 0:00.09 0.00 1.Kh2 Qh1+ 2.Kxh1 (3.334) 35.0
9.01 0:00.09 0.00 1.Kh2 Qh1+ 2.Kxh1 (3.379) 34.4
9 -> 0:00.10 0.00 1.Kh2 Qh1+ 2.Kxh1 (4.489) 42.3
10.01 0:00.10 0.00 1.Kh2 Qh1+ 2.Kxh1 (4.878) 45.1
10 -> 0:00.12 0.00 1.Kh2 Qh1+ 2.Kxh1 (7.305) 60.8
11.01 0:00.13 0.00 1.Kh2 Qh1+ 2.Kxh1 (8.343) 64.1
11 -> 0:00.14 0.00 1.Kh2 Qh1+ 2.Kxh1 (11.662) 79.8
12.01 0:00.15 0.00 1.Kh2 Qh1+ 2.Kxh1 (12.718) 82.0
12 -> 0:00.17 0.00 1.Kh2 Qh1+ 2.Kxh1 (17.187) 98.2
13.01 0:00.18 0.00 1.Kh2 Qh1+ 2.Kxh1 (18.271) 101.5
13 -> 0:00.84 0.00 1.Kh2 Qh1+ 2.Kxh1 (117.070) 138.2
14.01 0:00.85 0.00 1.Kh2 Qh1+ 2.Kxh1 (117.496) 137.7
14 -> 0:00.99 0.00 1.Kh2 Qh1+ 2.Kxh1 (142.282) 143.7
15.01 0:00.99 0.00 1.Kh2 Qh1+ 2.Kxh1 (143.323) 144.0
15 -> 0:01.50 0.00 1.Kh2 Qh1+ 2.Kxh1 (225.341) 150.2
16.01 0:01.50 0.00 1.Kh2 Qh1+ 2.Kxh1 (226.456) 150.4
16 -> 0:02.53 0.00 1.Kh2 Qh1+ 2.Kxh1 (394.210) 155.5
17.01 0:02.54 0.00 1.Kh2 Qh1+ 2.Kxh1 (395.489) 155.3
17 -> 0:05.88 0.00 1.Kh2 Qh1+ 2.Kxh1 (911.718) 155.0
18.01 0:05.89 0.00 1.Kh2 Qh1+ 2.Kxh1 (913.185) 155.0
18 -> 0:13.29 0.00 1.Kh2 Qh1+ 2.Kxh1 (2.068.018) 155.5
19.01 0:13.30 0.00 1.Kh2 Qh1+ 2.Kxh1 (2.069.280) 155.5
19 -> 0:32.75 0.00 1.Kh2 Qh1+ 2.Kxh1 (5.040.809) 153.9
20.01 0:32.76 0.00 1.Kh2 Qh1+ 2.Kxh1 (5.042.276) 153.9
best move: Kg1-h2 time: 0:41.568 min n/s: 152.589 nodes: 6.342.858
eval hash hits 22%; search/eval hash 33% / 27% filled
pb move: 1...Qc1-h1
### 1. ... | Qc1xe1 ###
8/2B5/8/6pp/7k/7P/6P1/4q1K1 b - -
+---+---+---+---+---+---+---+---+
8 | |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
7 |:::| | B | |:::| |:::|
+---+---+---+---+---+---+---+---+
6 | |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
5 |:::| |:::| |:::| |*P*|*P*
+---+---+---+---+---+---+---+---+
4 | |:::| |:::| |:::| |*K*
+---+---+---+---+---+---+---+---+
3 |:::| |:::| |:::| |:::| P
+---+---+---+---+---+---+---+---+
2 | |:::| |:::| |:::| P |:::
+---+---+---+---+---+---+---+---+
1 |:::| |:::| |*Q*| | K |
+---+---+---+---+---+---+---+---+
a b c d e f g h
PB: 1.01 0:00.01 +7.32++ 2...Qf2 (1) 0.0
PB: 1.01 0:00.01 +8.22++ 2...Qf2 (2) 0.1
PB: 1.01 0:00.02 +8.22 2...Qf2 (3) 0.1
PB: 1 -> 0:00.02 +8.22 2...Qf2 (27) 1.1
PB: 2.01 0:00.02 +8.29 2...Qf2 3.Be5 (42) 1.6
PB: 2 -> 0:00.02 +8.29 2...Qf2 3.Be5 (124) 4.5
PB: 3.01 0:00.03 +8.12 2...Qf2 3.Be5 g4 (202) 6.7
PB: 3 -> 0:00.03 +8.12 2...Qf2 3.Be5 g4 (562) 17.0
PB: 4.01 0:00.03 +8.13 2...Qf2 3.Be5 g4 4.hxg4 Kxg4 (701) 18.4
PB: 4 -> 0:00.04 +8.13 2...Qf2 3.Be5 g4 4.hxg4 Kxg4 (944) 20.5
PB: 5.01 0:00.05 +3.30-- 2...Qf2 (1.475) 29.5
PB: 5.01 0:00.05 +2.02-- 2...Qf2 (1.508) 27.9
PB: 5.01 0:00.05 -4.07 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 (1.735)
30.4
PB: 5 -> 0:00.07 -4.07 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 (3.264)
45.9
PB: 6.01 0:00.07 -4.07 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 (3.654)
48.7
PB: 6 -> 0:00.08 -4.07 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 (4.020)
47.2
PB: 7.01 0:00.09 -4.13 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.hxg4 Kxg4
(4.943) 54.9
PB: 7 -> 0:00.10 -4.13 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.hxg4 Kxg4
(6.015) 58.3
PB: 8.01 0:00.11 -4.12 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Be7+ Kg3 6.hxg4 hxg4
7.Bd6+ Kh4 8.g3+ Kh3 (9.077) 78.9
PB: 8 -> 0:00.14 -4.12 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Be7+ Kg3 6.hxg4 hxg4
7.Bd6+ Kh4 8.g3+ Kh3 (13.052) 90.0
PB: 9.01 0:00.16 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kf2 h4
7.Be5 Kf5 (18.305) 110.9
PB: 9.04 0:00.20 -4.13++ 2...Qg1+ (28.144) 136.6
PB: 9.04 0:00.21 -4.13 2...Qg1+ 3.Kxg1 g4 4.Kh2 Kg5 5.hxg4 Kxg4 6.Be5
(28.932) 134.5
PB: 9 -> 0:00.22 -4.13 2...Qg1+ 3.Kxg1 g4 4.Kh2 Kg5 5.hxg4 Kxg4 6.Be5
(29.922) 131.8
PB: 10.01 0:00.28 -4.17 2...Qg1+ 3.Kxg1 g4 4.Kh2 Kg5 5.h4+ Kf5 6.Kg3 Ke4
7.Bf4 Kd4 (43.465) 155.2
PB: 10.02 0:00.29 -4.16++ 2...Qf2 (47.620) 161.4
PB: 10.02 0:00.32 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7
(52.800) 165.0
PB: 10 -> 0:00.34 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7
(55.854) 163.7
PB: 11.01 0:00.38 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7
(67.841) 176.2
PB: 11 -> 0:00.40 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7
(69.789) 173.6
PB: 12.01 0:00.45 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7 gxh3
7.Kxh3 Kf6 (85.034) 186.8
PB: 12 -> 0:00.47 -4.14 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7 gxh3
7.Kxh3 Kf6 (86.643) 183.1
PB: 13.01 0:00.56 -4.27 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 Kg5 6.Bc7 Kf5
7.Kg3 gxh3 8.gxh3 Ke4 9.Kh4 (111.793) 199.6
PB: 13.02 0:00.77 -4.26++ 2...Qg1+ (171.763) 223.0
PB: 13.02 0:00.78 -4.26 2...Qg1+ 3.Kxg1 g4 4.Kh2 Kg5 5.Bd6 Kf5 6.Kg3 Ke6
7.Bc7 Kd7 8.Be5 Ke6 9.Kf4 (174.107) 221.7
PB: 13 -> 0:00.80 -4.26 2...Qg1+ 3.Kxg1 g4 4.Kh2 Kg5 5.Bd6 Kf5 6.Kg3 Ke6
7.Bc7 Kd7 8.Be5 Ke6 9.Kf4 (176.300) 219.5
PB: 14.01 0:01.31 -4.51-- 2...Qg1+ (316.743) 241.7
PB: 14.01 0:01.31 -5.03-- 2...Qg1+ (317.262) 240.8
PB: 14.01 0:01.48 -5.03 2...Qg1+ 3.Kxg1 g4 4.Bd8+ Kg3 5.hxg4 Kxg4 6.Bh4
Kxh4 7.Kf2 Kg4 8.Ke3 h4 9.Kf2 h3 10.Kf1 hxg2+ 11.Ke2 g1Q (368.130) 247.8
PB: 14.02 0:01.62 -5.02++ 2...Qf2 (405.849) 250.5
PB: 14.02 0:01.93 -4.67++ 2...Qf2 (497.898) 257.9
PB: 14.02 0:02.49 -4.36 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Be7+ Kf4 8.Kg2 Ke5 9.Kg3 Kf5 10.Kh4 Kg6 11.Bg5 (640.919) 257.3
PB: 14 -> 0:02.50 -4.36 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Be7+ Kf4 8.Kg2 Ke5 9.Kg3 Kf5 10.Kh4 Kg6 11.Bg5 (642.567) 256.5
PB: 15.01 0:02.90 -4.46 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Bc7 Kf5 8.Kg3 Kg5 9.Bd8+ Kh6 10.Bf6 Kg6 11.Be5 Kf5 12.Bg7 Ke4 13.Kh4 (756.235)
260.7
PB: 15 -> 0:02.97 -4.46 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Bc7 Kf5 8.Kg3 Kg5 9.Bd8+ Kh6 10.Bf6 Kg6 11.Be5 Kf5 12.Bg7 Ke4 13.Kh4 (772.621)
259.7
PB: 16.01 0:03.16 -4.47 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Bc7 Kf5 8.Kg3 Kg5 9.Bd8+ Kf5 10.Bb6 (827.503) 261.8
PB: 16 -> 0:03.20 -4.47 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Bc7 Kf5 8.Kg3 Kg5 9.Bd8+ Kf5 10.Bb6 (835.977) 261.1
PB: 17.01 0:03.31 -4.72-- 2...Qf2 (866.648) 261.4
PB: 17.01 0:03.93 -4.72 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.h4+ Kxh4 8.Bf4 (1.041.325) 264.6
PB: 17 -> 0:04.05 -4.72 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.h4+ Kxh4 8.Bf4 (1.070.125) 263.6
PB: 18.01 0:04.16 -4.97-- 2...Qf2 (1.097.872) 263.9
PB: 18.01 0:05.79 -5.41 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bb8 Kg4 8.Bg3 Kf5 9.Kh3 Ke6 10.Kh4 Kf5 (1.541.675) 266.2
PB: 18 -> 0:06.04 -5.41 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bb8 Kg4 8.Bg3 Kf5 9.Kh3 Ke6 10.Kh4 Kf5 (1.602.363) 265.2
PB: 19.01 0:07.04 -5.41 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bb8 Kg4 8.Bg3 Kf5 9.Kh3 Ke6 10.Kh4 Kf5 (1.892.828) 268.8
PB: 19 -> 0:07.09 -5.41 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bb8 Kg4 8.Bg3 Kf5 9.Kh3 Ke6 10.Kh4 Kf5 (1.907.849) 268.7
PB: 20.01 0:11.24 -5.61 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Kg1 Kf5 8.Bc7 Ke6 9.Kh2 (3.076.752) 273.7
PB: 20 -> 0:11.42 -5.61 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Kh2 gxh3 6.gxh3 Kg5
7.Kg1 Kf5 8.Bc7 Ke6 9.Kh2 (3.125.164) 273.5
PB: 21.01 0:14.43 -5.64 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Be7+ Kg3 6.hxg4 Kxg4
7.Kf2 Kf4 8.Bf6 Ke4 9.Kg3 (4.010.237) 277.8
PB: 21 -> 0:14.81 -5.64 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.Be7+ Kg3 6.hxg4 Kxg4
7.Kf2 Kf4 8.Bf6 Ke4 9.Kg3 (4.114.606) 277.7
PB: 22.01 0:19.76 -5.85 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bg3+ Kg4 8.Be1 h4 9.Bc3 (5.577.765) 282.2
PB: 22 -> 0:20.30 -5.85 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bg3+ Kg4 8.Be1 h4 9.Bc3 (5.730.235) 282.2
PB: 23.01 0:29.93 -5.89 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bg3+ Kg4 8.Bf2 Kf5 9.Kh3 Kg5 10.Be3+ Kf5 11.Kh4 Kg6 12.g3 (8.480.447) 283.2
PB: 23 -> 0:30.63 -5.89 2...Qf2 3.Bd6 Qg1+ 4.Kxg1 g4 5.hxg4 Kxg4 6.Kh2 Kh4
7.Bg3+ Kg4 8.Bf2 Kf5 9.Kh3 Kg5 10.Be3+ Kf5 11.Kh4 Kg6 12.g3 Kf6 13.Kxh5 Kg7
(8.690.354) 283.7
save in file D:\Shredder3\autosave.pgn!
save in file D:\Shredder3\lastgame.pgn!
>Your position is easyly seen as a possible problem for a null-mover, because
>the black king stands in a dangerous position.
>So you cannot trust a null-mover (usually). And yes, there are many examples
>like this.
>By the way, Crafty (somewhat modified) gives:
> 19-> 5:14 23.01 1. Qe1+ Qxe1+ 2. Kh2 Qf2 3. Bd6 Qg1+
> 4. Kxg1 g4 5. hxg4 Kg5 6. gxh5 Kg4
> 7. h6 Kg5 8. h7 Kf5 9. h8=Q Ke4 10.
> Qe5+ Kd3 11. g4 Kc4 12. g5 Kd3 13.
> Qf5+ Ke3 14. Bc5+ Ke2 15. Qf1+ Kd2
> 16. g6
>
>
>Kind regards
>Bernhard
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