Author: Slater Wold
Date: 21:19:46 11/03/01
Go up one level in this thread
On November 03, 2001 at 18:21:54, Uri Blass wrote:
>On November 03, 2001 at 18:06:36, Dan Andersson wrote:
>
>>I would say that the mistake was 31... Qxf4 The game seems terribly one sided
>>after that. Not that blacks position is that tasty before, except for white that
>>is:)
>>
>>MvH Dan Andersson
>
>I can say that I do not know what was the losing mistake and the only clear
>thing is that there is a drop in the evaluation of more than 1 pawn after Qg5
>
>The only logical alternative is Qh6 and we need to analyze the position after
>Qh6 in order to prove a clear advantage for white before claiming that Qxf4 was
>a mistake.
>
>I am also not sure that Qg5 is the losing mistake because I did not analyze it
>enough and evaluation of +1.xx is not a proof but I believe that black is losing
>after Qg5.
>
>Uri
I analyzed this position and game for some time. It was a mixture of things.
Right after 33...Rff8 Michel disconnected from my computer. (From what I hear,
the internet connection at the tournament hall is very bad.) When Crafty made
the move 33...Rff8, it scored it 0.69 for white. From the log:
White(33): Kh1 [pondering]
time limit 1:27 (10:11)
nss depth time score variation (13)
14 3.37 -- 33. ... Rff8
White(33): Kh1
predicted move made.
14 2:46 0.69 33. ... Rff8 34. Rf3 Qg5 35. Rg3 Qh4
36. Nxd7 Nxd7 37. Bxg6 Qf6 38. Bf5+
Kh8 39. Qxf6+ Nxf6 40. Rc7 Rae8 41.
h4 Re1+ 42. Kh2 a6
(2) 14-> 5:11 0.69 33. ... Rff8 34. Rf3 Qg5 35. Rg3 Qh4
36. Nxd7 Nxd7 37. Bxg6 Qf6 38. Bf5+
Kh8 39. Qxf6+ Nxf6 40. Rc7 Rae8 41.
h4 Re1+ 42. Kh2 a6
time=5:13 cpu=198% mat=-1 n=463626612 fh=92% nps=1479k
ext-> chk=25658935 cap=1009410 pp=24540 1rep=2507646 mate=364712
predicted=24 nodes=463626612 evals=85063890
endgame tablebase-> probes done=0 successful=0
hashing-> trans/ref=25% pawn=99% used=6%
SMP-> split=631 stop=113 data=9/32 cpu=10:23 elap=5:13
time used: 1:26
Afterwards, Rf3 was played, and from the log:
White(34): Rf3 [pondering]
time limit 1:21 (9:31)
nss depth time score variation (13)
13 24.18 0.79 34. ... Qg5 35. Rg3 Qh4 36. Nxd7 Nxd7
37. Bxg6 Qf6 38. Bf5+ Kh8 39. Qxf6+
Nxf6 40. Rc7 Rae8 41. h4 Re5 42. Rf3
a6
13-> 29.40 0.79 34. ... Qg5 35. Rg3 Qh4 36. Nxd7 Nxd7
37. Bxg6 Qf6 38. Bf5+ Kh8 39. Qxf6+
Nxf6 40. Rc7 Rae8 41. h4 Re5 42. Rf3
a6
14 1:35 0.94 34. ... Qg5 35. Rg3 Qh4 36. Bxg6 Ng4
37. Nxg4 Bxg4 38. Bd3 Rac8 39. Rxc8
Rxc8 40. Bf5 Qxg3 41. Bxh7+ Kxh7 42.
hxg3 Rh8
14-> 1:50 0.94 34. ... Qg5 35. Rg3 Qh4 36. Bxg6 Ng4
37. Nxg4 Bxg4 38. Bd3 Rac8 39. Rxc8
Rxc8 40. Bf5 Qxg3 41. Bxh7+ Kxh7 42.
hxg3 Rh8
And this is where Michel got disconnected, and had to use Bob's computer
instead. Starting a fresh search is a bummer. And this would probably be the
*worst* position in the world for this to happen.
Qg5 is the loser. Qh6 shines a lot more hope on a draw.
BTW: This was just a little test to see how long it would take Crafty to get
Qh6, with the hash cleared:
clearing hash tables
time surplus 0.00 time limit 60:00 (60:00)
nss depth time score variation (1)
starting thread 1
6 0.09 -- 1. ... Qg5
6 0.12 0.19 1. ... Qg5 2. Rcf1 Be8 3. Nxg6 Bxg6
4. Bxg6 Qxg6 5. Rxf6
6-> 0.15 0.19 1. ... Qg5 2. Rcf1 Be8 3. Nxg6 Bxg6
4. Bxg6 Qxg6 5. Rxf6
7 0.28 ++ 1. ... Qg5!!
7-> 0.43 -0.20 1. ... Qg5 2. Rcf1 Be8 3. Nxg6 Bxg6
4. Bxg6 Qxg6 5. Rxf6
8 0.71 -0.10 1. ... Qg5 2. Rcf1 Bg4 3. Nxg4 Nxg4
4. Rxf8+ Rxf8 5. Rxf8+ Kxf8 6. Qh8+
Ke7 7. Qxh7+ Kf6 8. Qh8+ Ke6 9. Qd4
8-> 0.79 -0.10 1. ... Qg5 2. Rcf1 Bg4 3. Nxg4 Nxg4
4. Rxf8+ Rxf8 5. Rxf8+ Kxf8 6. Qh8+
Ke7 7. Qxh7+ Kf6 8. Qh8+ Ke6 9. Qd4
9 1.53 0.00 1. ... Qg5 2. Rcf1 Bg4 3. Nxg4 Nxg4
4. Rxf8+ Rxf8 5. Rxf8+ Kxf8 6. Qh8+
Ke7 7. Qxh7+ Kf6 8. Qh8+ Kf7 9. Qh7+
Kf6
9-> 1.68 0.00 1. ... Qg5 2. Rcf1 Bg4 3. Nxg4 Nxg4
4. Rxf8+ Rxf8 5. Rxf8+ Kxf8 6. Qh8+
Ke7 7. Qxh7+ Kf6 8. Qh8+ Kf7 9. Qh7+
Kf6
10 8.23 -0.32 1. ... Qg5 2. Rc7 Ba4 3. Qd4 Rae8 4.
Re3 a5 5. h4 Qh6 6. Rf3
10-> 8.50 -0.32 1. ... Qg5 2. Rc7 Ba4 3. Qd4 Rae8 4.
Re3 a5 5. h4 Qh6 6. Rf3
11 15.81 -- 1. ... Qg5
11 23.59 0.78 1. ... Qg5 2. Rg3 Bg4 3. h3 Qf4 4.
Rxg4 Nxg4 5. Nxg4 Rad8 6. Rf1 Qg3 7.
Rxf8+ Kxf8
11-> 24.54 0.78 1. ... Qg5 2. Rg3 Bg4 3. h3 Qf4 4.
Rxg4 Nxg4 5. Nxg4 Rad8 6. Rf1 Qg3 7.
Rxf8+ Kxf8
12 34.20 0.96 1. ... Qg5 2. Rg3 Qh4 3. Nxd7 Nxd7
4. Bxg6 Qf6 5. Qb1 Kh8 6. Rh3 Ne5 7.
Rxh7+ Kg8 8. Bd3 a6
12-> 36.06 0.96 1. ... Qg5 2. Rg3 Qh4 3. Nxd7 Nxd7
4. Bxg6 Qf6 5. Qb1 Kh8 6. Rh3 Ne5 7.
Rxh7+ Kg8 8. Bd3 a6
13 1:02 0.94 1. ... Qg5 2. Rg3 Qh4 3. Bxg6 Ng4 4.
Nxg4 Bxg4 5. Bd3 Rfc8 6. Rxc8+ Rxc8
7. Bf5 Qxg3 8. Bxh7+ Kxh7 9. hxg3 Rh8
13-> 1:07 0.94 1. ... Qg5 2. Rg3 Qh4 3. Bxg6 Ng4 4.
Nxg4 Bxg4 5. Bd3 Rfc8 6. Rxc8+ Rxc8
7. Bf5 Qxg3 8. Bxh7+ Kxh7 9. hxg3 Rh8
14 2:00 1.22 1. ... Qg5 2. Rg3 Qh4 3. Bxg6 Ng4 4.
Nxg4 Bxg4 5. Bd3 Rac8 6. Rxc8 Rxc8
7. Bf5 Qxg3 8. Bxh7+ Kxh7 9. hxg3 Rh8
<HT>
14 16:31 1.08 1. ... Qh6 2. Rxf6 Rxf6 3. Nxd7 Rf2
4. Qxf2 Qxc1+ 5. Qf1 Qxa3 6. Bb5 Qxb4
7. Bc6 Rc8 8. Bxd5+ Kg7 9. Qa1+ Qc3
10. Qxa7
14-> 16:31 1.08 1. ... Qh6 2. Rxf6 Rxf6 3. Nxd7 Rf2
4. Qxf2 Qxc1+ 5. Qf1 Qxa3 6. Bb5 Qxb4
7. Bc6 Rc8 8. Bxd5+ Kg7 9. Qa1+ Qc3
10. Qxa7
Century is a tough opponent. No one else at the tournament has beat it, other
than CT. It played very well. In such a tough game, the worse thing that could
possibly happen, is that the computer crashes (or in this case, you lose your
connection).
The Rebel programs have done extremely well. I congratulate both Chris and Ed.
Slate
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