Author: Dave Gomboc
Date: 08:26:43 01/18/00
Go up one level in this thread
On January 18, 2000 at 03:20:27, Dave Gomboc wrote:
>So, I played through the game to move 34, where you said that White gave up a
>pawn for no reason, and started that going. 34. Nb2 was assessed at -1.4 or so
>pretty early, and was replaced by 34. Rff1. On depth 10, Rff1 was found to suck
>as well (-1.4) and the key move switched to 34. Rd1. As depth 14 computes, the
>current info is
>
>depth=14 7/35 -1.12 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7 37. Re3 f4 38. Re4 Nf7
>39. Re8+ Bxe8 40. Rxe8+ Bf8 41. Bh4 cxb3 42. axb3 d5
>Nodes: 350406379 (25 minutes) (the node count doesn't change every time the
>elapsed time and NPS are being updated... bug in Crafty or Winboard, or normal
>behaviour?)
>
>Anyway, the PV looks somewhat unconvincing (White basically is marking time with
>his rooks for a few moves while Black decides where to put his dark-squared
>bishop). I wouldn't be terribly surprised if Rd1 were to fail low to the -1.4
>area in the next iteration or two as well. Maybe Nb2 looks like a sick move,
>but if Cray Blitz wasn't programmed to play the move that failed low last if the
>scores for all moves are found to suck relative to the score expectation when
>the search was started, then the reason it was played is simply that all the
>other moves are bad too.
Hmm... now at
depth=17 2/35 -1.28 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7 37. Re3 f4 38. Rh3 Bd7
39. Be4 Bc6 40. Rh4 cxb3 41. axb3 Rxb3 42. Bxc6 Nxc6 43. Re8+ Kf7
which still seems weird to me :) but in any case Black seems to be picking up a
pawn no matter what White does, so Nb2 may not be horrible. Hey, it just
occured to me that I had logging on. Here's the first search (for 27. ...c5).
Scores are always from White's perspective in the log, I think.
middle-game phase
clearing hash tables
time surplus 0.09 time limit 0.09 (0.54)
nss depth time score variation (1)
starting thread 1
(2) 6-> 0.72 -0.13 27. ... g6 28. a3 Re8 29. Bd4 c5 30.
Be3
7 0.86 -0.03 27. ... g6 28. a3 Re8 29. Bd4 c5 30.
Be3 Bg7
7 1.65 0.01 27. ... Rb7 28. Be3 Re8 29. Rf4 Rbe7
30. a3 Bg4
7-> 1.65 0.01 27. ... Rb7 28. Be3 Re8 29. Rf4 Rbe7
30. a3 Bg4
8 3.17 -0.17 27. ... Rb7 28. Bd4 Re8 29. Be4 Bf7
30. Rfe2 Rbe7 31. c4
8 5.45 -0.07 27. ... g6 28. a3 Re8 29. c4 d5 30.
cxd5 Bxd5 31. Ra1 Bg7
(3) 8-> 10.23 -0.07 27. ... g6 28. a3 Re8 29. c4 d5 30.
cxd5 Bxd5 31. Ra1 Bg7
(2) 9 12.92 -0.02 27. ... g6 28. a3 Re8 29. c4 Bg7 30.
Rd2 Rd7 31. Be4 c5
9 17.86 0.00 27. ... Rb7 28. Bd4 Re8 29. c4 c5 30.
Be4 Rd7 31. Be3 Rde7
(2) 9-> 18.06 0.00 27. ... Rb7 28. Bd4 Re8 29. c4 c5 30.
Be4 Rd7 31. Be3 Rde7
10 20.97 -0.07 27. ... Rb7 28. Bd4 Re8 29. c4 c5 30.
Bc3 Ra7 31. Rfe2 Rxa4 32. bxa4 Bxc4
10 41.15 -0.06 27. ... g6 28. c4 Bg7 29. a3 Re7 30.
Rd2 Ree8 31. Rde2 Rxa4 32. bxa4 Bxc4
10 1:21 -0.03 27. ... Re8 28. c4 Rfe7 29. Nc3 Bg4
30. Ref1 Nd7 31. Rf4 <HT>
(3) 10-> 1:23 -0.03 27. ... Re8 28. c4 Rfe7 29. Nc3 Bg4
30. Ref1 Nd7 31. Rf4 <HT>
(2) 11 2:23 0.00 27. ... Re8 28. c4 c5 29. Ba5 g6 30.
a3 Bg7 31. Bc3 Ng4 32. Rd2 Rd7
11 3:22 0.01 27. ... c5 28. Be4 Re8 29. Rfe2 Rfe7
30. c4 Bg4 31. Bd5+ Kh8 32. Re4 Nd3
33. Bd8
(2) 11-> 3:22 0.01 27. ... c5 28. Be4 Re8 29. Rfe2 Rfe7
30. c4 Bg4 31. Bd5+ Kh8 32. Re4 Nd3
33. Bd8
12 4:42 0.00 27. ... c5 28. Be4 Re8 29. Ref1 Rfe7
30. Rd2 Rf7 31. Rdf2
(2) 12-> 7:06 0.00 27. ... c5 28. Be4 Re8 29. Ref1 Rfe7
30. Rd2 Rf7 31. Rdf2
13 12:50 0.06 27. ... c5 28. Be4 Ra6 29. Rb1 f5 30.
Bc2 Rb7 31. Bd8 Ra8 32. Bg5 h6 33.
Bf4 g6
13-> 13:29 0.06 27. ... c5 28. Be4 Ra6 29. Rb1 f5 30.
Bc2 Rb7 31. Bd8 Ra8 32. Bg5 h6 33.
Bf4 g6
14 17:09 0.04 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 c4 31. Bc2 Bd7 32. Re3 Bxa4
33. bxa4 Rb7 34. a5 g6
(4) 14-> 33:31 0.04 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 c4 31. Bc2 Bd7 32. Re3 Bxa4
33. bxa4 Rb7 34. a5 g6
(3) 15 45:41 0.10 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 Bf7 31. h3 c4 32. Bc2 Be8 33.
Bd8 Rd7 34. Bb6 Re7
15-> 51:01 0.10 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 Bf7 31. h3 c4 32. Bc2 Be8 33.
Bd8 Rd7 34. Bb6 Re7
16 83:41 0.14 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 Bf7 31. Kh1 Nc4 32. Bd3 Rxb6
33. Rxe7 Bxe7 34. Bxc4 Rb8 35. Bxf7+
Kxf7 36. a3 Re8
(2) 16-> 126:44 0.14 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 Bf7 31. Kh1 Nc4 32. Bd3 Rxb6
33. Rxe7 Bxe7 34. Bxc4 Rb8 35. Bxf7+
Kxf7 36. a3 Re8
17 221:39 0.20 27. ... c5 28. Be4 Ra6 29. Rb1 Re7
30. Re2 Bf7 31. Kh1 Nc4 32. Bd3 Rxe2
33. Bxe2 Ra8 34. Bc7 Ne3 35. Ra1 Nd5
36. Bb6 Nxb6 37. Nxb6
Once ...c5 is found, it's stuck with, but no particularly large advantage for
Black is seen (yet!?).
Now for White's 34th:
middle-game phase
clearing hash tables
time surplus 3.06 time limit 0.09 (0.54)
nss depth time score variation (1)
6-> 0.56 -0.24 34. Rff1 Bg7 35. Bg5 h6 36. Bf4 Nd3
37. Bxd3 cxd3
7 0.97 -0.23 34. Rff1 Bg7 35. Bg5 h6 36. Bd2 Ra5
37. Rfe1 Bxa4 38. bxa4
7-> 1.31 -0.23 34. Rff1 Bg7 35. Bg5 h6 36. Bd2 Ra5
37. Rfe1 Bxa4 38. bxa4
8 2.15 -0.28 34. Rff1 Bg7 35. Bg5 Nd3 36. Bd2 Bxa4
37. bxa4 Rxb1 38. Rxb1 Ra5
8-> 3.04 -0.28 34. Rff1 Bg7 35. Bg5 Nd3 36. Bd2 Bxa4
37. bxa4 Rxb1 38. Rxb1 Ra5
9 12.50 -0.47 34. Rff1 Bc6 35. Bf6 Nd7 36. Bd4 Be4
37. Bxe4 fxe4 38. Be3 d5
9-> 16.31 -0.47 34. Rff1 Bc6 35. Bf6 Nd7 36. Bd4 Be4
37. Bxe4 fxe4 38. Be3 d5
10 28.81 -- 34. Rff1
10 1:06 -1.56 34. Rff1 Bh6 35. Rfd1 Ng4 36. Re1 Be3+
37. Kh1 Bxa4 38. bxa4 Rxb1 39. Bxb1
Nf2+ 40. Kg1 Nd1+ 41. Kf1 Nxc3 42.
Rxe3 Nxb1
10 1:26 ++ 34. Rd1!!
10 1:44 -0.84 34. Rd1 Bxa4 35. bxa4 Bg7 36. Bg5 Nf7
37. Bd2 Rb2 38. Be1 Rxa2 39. Re2
(2) 10-> 1:59 -0.84 34. Rd1 Bxa4 35. bxa4 Bg7 36. Bg5 Nf7
37. Bd2 Rb2 38. Be1 Rxa2 39. Re2
11 2:45 -1.06 34. Rd1 Bg7 35. Bg5 Bxa4 36. bxa4 Nf7
37. Bd2 Rb2 38. Rc1 Rxa2 <HT>
11-> 3:49 -1.06 34. Rd1 Bg7 35. Bg5 Bxa4 36. bxa4 Nf7
37. Bd2 Rb2 38. Rc1 Rxa2 <HT>
12 5:42 -0.96 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Rf2 Ra8 38. Bh4 Nd3 39. Bxd3 cxd3
40. Bg3 Bxa4 41. bxa4 Rxa4 42. Bxd6
12-> 6:42 -0.96 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Rf2 Ra8 38. Bh4 Nd3 39. Bxd3 cxd3
40. Bg3 Bxa4 41. bxa4 Rxa4 42. Bxd6
13 9:40 -1.12 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Nc5 dxc5 38. Rxe5 Rxa2 39. Re7+
Rxe7 40. Rxe7+ Kg8 41. Bd1 cxb3 42.
Bxb3+
13-> 13:06 -1.12 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Nc5 dxc5 38. Rxe5 Rxa2 39. Re7+
Rxe7 40. Rxe7+ Kg8 41. Bd1 cxb3 42.
Bxb3+
14 20:05 -1.12 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7
37. Re3 f4 38. Re4 Nf7 39. Re8+ Bxe8
40. Rxe8+ Bf8 41. Bh4 cxb3 42. axb3
d5
(2) 14-> 33:42 -1.12 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7
37. Re3 f4 38. Re4 Nf7 39. Re8+ Bxe8
40. Rxe8+ Bf8 41. Bh4 cxb3 42. axb3
d5
15 48:23 -1.25 34. Rd1 Bh6 35. Re2 Bb5 36. Rb1 Rf7
37. Rbe1 cxb3 38. axb3 Bxe2 39. Rxe2
Rfa7 40. Bb6 Re7 41. Bd3 Ra8
(2) 15-> 97:21 -1.25 34. Rd1 Bh6 35. Re2 Bb5 36. Rb1 Rf7
37. Rbe1 cxb3 38. axb3 Bxe2 39. Rxe2
Rfa7 40. Bb6 Re7 41. Bd3 Ra8
16 155:34 -1.31 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Kh1 cxb3 38. axb3 Bxe2 39. Rxe2
Ra8 40. Bh4 Bf4 41. b4 Rb5 42. Be7
(2) 16-> 248:00 -1.31 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Kg7
37. Kh1 cxb3 38. axb3 Bxe2 39. Rxe2
Ra8 40. Bh4 Bf4 41. b4 Rb5 42. Be7
17 440:41 -1.28 34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7
37. Re3 f4 38. Rh3 Bd7 39. Be4 Bc6
40. Rh4 cxb3 41. axb3 Rxb3 42. Bxc6
Nxc6 43. Re8+ Kf7
So 34. Rd1 seems to be holding out a bit better. I play out the next 8 ply of
the PV (34. Rd1 Bh6 35. Re2 Bb5 36. Rde1 Bg7 37. Re3 f4). After 5 minutes, it's
already looking worse: depth=12 1/39 -1.49 38. Rh3 Bc6 39. Rf1 f3 30. gxf3 Nf7
41. Bh4 Bxa4 42. bxa4 Rb2 43. Rc1 Bxc3. I change my mind: Rd1 isn't holding out
after all. Black is rolling White into a little ball.
So, 27...c5 may still be the move you're looking for, Amir. I guess it's time
to check out move 32.
Dave
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