"It was twenty years ago today, Murray Campbell taught the Blue to play" Beatles: Sgt. Pepper, 1967
Looking back at a piece of history.
http://books.google.dk/books?id=zV0W472 ... rk&f=false
If this link works, you can read a part of Hsu's book "Behind Deep Blue" about the trip to Denmark in 1993. At page 138 after the headline "Day 1 (Wednesday, 24 February) Hsu starts the chapter with "This was a disastrous day"
Deep Blue had lost the first game against Bent Larsen. That is well known.
But there were also played some rapid games.
Such two games were also played that day, and Deep Blue lost them both.
And in a terrible way.
Despite that rapid chess should be in favour of the computer.
The game against Bjarke Kristensen, black.
Position before 9.Nb5??
[d]r1b2rk1/ppppnppp/2n3q1/2b5/2BNP3/2P1B3/PP3PPP/RN1Q1RK1 w - - 5 9
In this position Deep Blue played its first move out of book: 9.Nb5??
Bjarke now played a very fine attack and won.
End position:
[d]5rk1/1p3ppp/7q/8/2P1nb2/1Q1B3b/PP3PP1/R3R2K w - - 0 25
The whole game:
[pgn]
[Event "Match"]
[Site "Copenhagen (Denmark)"]
[Date "1993.??.??"]
[Round "?"]
[White "Computer \"Deep Blue Jr\""]
[Black "bjarke kristensen"]
[Result "0-1"]
[BlackElo "2000"]
[ECO "C45"]
[Opening "Scotch"]
[Variation "4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bc4 Ne5"]
[TimeControl "0+30"]
[Termination "normal"]
[PlyCount "48"]
[WhiteType "human"]
[BlackType "human"]
1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 O-O
8. O-O Qg6 9. Nb5 Bxe3 10. Nxc7 Bf4 11. Nxa8 Ne5 12. Be2 d5 13. Kh1 dxe4
14. Na3 Ng4 15. h3 Nf6 16. Qb3 Qh6 17. c4 Nc6 18. Nb5 a6 19. Nac7 axb5 20.
Nxb5 Ne5 21. Nd6 Be6 22. Rfe1 Nd3 23. Nxe4 Nxe4 24. Bxd3 Bxh3 0-1
[/pgn]
Jens Kristiansen, white, played very calm and prevented Deep Blue from doing anything.
It started to move back and forth and finally lost:
Position before 14.Ra8b8
[d]r4rk1/pppn1pp1/3p3p/2b1pP2/2P4q/1PNQB3/P1P2PPP/R4RK1 b - - 0 14
Position after 23.Qe3
[d]1r4rk/ppp2pp1/3p1q1p/4pP2/P1P1P3/1P2Q3/2P1R1PP/5R1K b - - 2 23
End position:
[d]1r2q1k1/5p2/pppp1Pp1/4p1PP/P1P1P2Q/1P6/2P4R/7K b - - 4 40
The whole game:
[pgn]
[Event "Match"]
[Site "Copenhagen (Denmark)"]
[Date "1993.??.??"]
[Round "?"]
[White "Kristiansen Jens (DEN)"]
[Black "Computer \"Deep Blue\""]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2415"]
[BlackElo "0"]
[Annotator ""]
[Source ""]
[Remark ""]
1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 Na5 5.Nge2 Nxc4 6.dxc4 Bc5 7.O-O
d6 8.Qd3 Be6 9.b3 O-O 10.Bg5 h6 11.Be3 Nd7 12.Ng3 Qh4
13.Nf5 Bxf5 14.exf5 Rab8 15.Ne4 Bb6 16.Rae1 Ba5 17.Re2 Bb6 18.a4
Kh8 19.Kh1 Bxe3 20.fxe3 Nf6 21.Nxf6 Qxf6 22.e4 Rg8 23.Qe3
b6 24.Rf3 Ra8 25.Ref2 Kh7 26.g4 Rgd8 27.Rh3 Kg8 28.Rh5 c6 29.Rd2
Rab8 30.h4 Qe7 31.g5 Kh7 32.f6 Qe6 33.Qf3 Rh8 34.Rg2 a6 35.Qg3
g6 36.Rxh6+ Kg8 37.Rxh8+ Kxh8 38.h5 Kg8 39.Qh4 Qe8 40.Rh2 1-0
[/pgn]
After the games I entered the room where Deep Blue and the Deep Blue team was.
It was with mixed emotions.
I had made a lot of material for preparing the danish players.
See http://www.youtube.com/watch?v=dZ2noNtG ... NQ&index=5
So I wanted the danish players to do well.
But I was also a programmer and a computerchess-freak.
So I also wanted Deep Blue to do well.
The mood was not good as I entered the room.
Hsu looked at me and said "It's all because of you, you, you"
I said, well, I expected Deep Blue would score better the following days.
Actually I did not know how much the danish players had studied my material.
And I hoped Deep Blue would do better.
If Deep Blue failed like that, the whole event would be a failure.
Luckily it turned out to be a quite even event.
Something was wrong with Deep Blue that day, and the following night Joe Hoane succeded to fix it.
Hsu ends the chapter: "The results, looking back today, are no longer important, but the match experience and the chess lessons we obtained from the trip were invaluable".
After this event the Deep Blue team got connected with a strong chessplayer.
24 February 1993 - a disastrous day for Deep Blue
Moderators: hgm, Rebel, chrisw
-
JBNielsen
- Posts: 267
- Joined: Thu Jul 07, 2011 10:31 pm
- Location: Denmark
-
JBNielsen
- Posts: 267
- Joined: Thu Jul 07, 2011 10:31 pm
- Location: Denmark
Re: 24 February 1993 - a disastrous day for Deep Blue
A few days later another game of rapid chess was played.
Svend Hamann played black and got a bad position.
Position after 37.-,Nc1
[d]5R2/r5pp/3N2k1/3Ppp2/2P5/p7/P5PP/2n3K1 w - - 2 38
But in the next few moves Deep Blue first lost its advantage, and then got a lost position.
Analysis after the games showed, that Deep Blue only needed a few seconds more to avoid the bad moves.
This is a good example of the horizon-effect.
[pgn][Event "Match"]
[Site "Copenhagen (Denmark)"]
[Date "1993.??.??"]
[Round "?"]
[White "Computer \"Deep Blue\""]
[Black "Hamann Svend (DEN)"]
[Result "0-1"]
[BlackElo "2322"]
[ECO "B92"]
[Opening "Sicilian"]
[Variation "Najdorf, 6.Be2 e5 7.Nb3 Be7 8.O-O O-O"]
[TimeControl "60+0"]
[Termination "normal"]
[PlyCount "100"]
[WhiteType "human"]
[BlackType "human"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Nbd7 7. Be2 e5
(7. .. g6 8. O-O Bg7 9. Kh1 O-O 10. a4) (7. .. e6 8. Bf3 Qc7) 8. Nb3 b5 9.
O-O Bb7 10. Bf3 Be7 11. Qe2 O-O 12. fxe5 dxe5 (12. .. Nxe5) 13. Bg5 (13.
a3) 13. .. b4 14. Nd1 a5 15. Nf2 a4 (15. .. Ba6) 16. Nc1 a3 17. b3 Qc7 (17.
.. h6) 18. Ncd3 Rac8 19. Bg4 Rce8 (19. .. Ba6) 20. Bxd7 Nxd7 (20. .. Qxd7)
21. Bxe7 Rxe7 22. Nxb4 Qc3 23. Qe1 Rc8 (23. .. Qc5) 24. Qxc3 Rxc3 25. Rad1
f6 26. Rd3 Rc7 (26. .. Rxd3) 27. c4 Nc5 (27. .. Rc8) 28. Rd8+ (28. Re3) 28.
.. Kf7 29. Nd5 Red7 (29. .. Bxd5) 30. Rh8 Bxd5 31. exd5 Kg6 32. Re1 Ra7
(32. .. Rb7) 33. Re3 Rdb7 34. Rf8 (34. Ne4) 34. .. Rxb3 (34. .. Nxb3) 35.
Rxb3 Nxb3 36. Ne4 f5 (36. .. Nc1) 37. Nd6 (37. Nc3) 37. .. Nc1 38. Rxf5
(38. Nb5) 38. .. Nxa2 39. Rxe5 (39. Rf3 Nb4 40. Rg3+ Kh5 41. Rh3+ Kg4 42.
Rg3+ Kf4 43. Rf3+ Kg4 44. Rg3+ Kf4 45. Rf3+ Kg4 46. Rg3+ Kf4 47. Rf3+ Kg4
48. Rg3+ Kf4 49. Rf3+ Kg4 50. Rg3+ Kf4 51. Rf3+ Kg4 52. Rg3+ Kf4 53. Rf3+
Kg4 54. Rg3+) 39. .. Nb4 40. Re6+ (40. h4) 40. .. Kh5 41. Re5+ g5 42. Re1
a2 43. h3 a1=Q 44. Rxa1 Rxa1+ 45. Kf2 Ra3 46. Ne4 Rd3 47. g3 Kg6 48. Ke2
Rd4 49. Nd2 (49. Nd6) 49. .. h5 50. Nf1 (50. g4) 50. .. Nc2 (50. .. Re4+)
0-1
[/pgn]
Game analysis presented by the dabbaba-tool:
Svend Hamann played black and got a bad position.
Position after 37.-,Nc1
[d]5R2/r5pp/3N2k1/3Ppp2/2P5/p7/P5PP/2n3K1 w - - 2 38
But in the next few moves Deep Blue first lost its advantage, and then got a lost position.
Analysis after the games showed, that Deep Blue only needed a few seconds more to avoid the bad moves.
This is a good example of the horizon-effect.
[pgn][Event "Match"]
[Site "Copenhagen (Denmark)"]
[Date "1993.??.??"]
[Round "?"]
[White "Computer \"Deep Blue\""]
[Black "Hamann Svend (DEN)"]
[Result "0-1"]
[BlackElo "2322"]
[ECO "B92"]
[Opening "Sicilian"]
[Variation "Najdorf, 6.Be2 e5 7.Nb3 Be7 8.O-O O-O"]
[TimeControl "60+0"]
[Termination "normal"]
[PlyCount "100"]
[WhiteType "human"]
[BlackType "human"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Nbd7 7. Be2 e5
(7. .. g6 8. O-O Bg7 9. Kh1 O-O 10. a4) (7. .. e6 8. Bf3 Qc7) 8. Nb3 b5 9.
O-O Bb7 10. Bf3 Be7 11. Qe2 O-O 12. fxe5 dxe5 (12. .. Nxe5) 13. Bg5 (13.
a3) 13. .. b4 14. Nd1 a5 15. Nf2 a4 (15. .. Ba6) 16. Nc1 a3 17. b3 Qc7 (17.
.. h6) 18. Ncd3 Rac8 19. Bg4 Rce8 (19. .. Ba6) 20. Bxd7 Nxd7 (20. .. Qxd7)
21. Bxe7 Rxe7 22. Nxb4 Qc3 23. Qe1 Rc8 (23. .. Qc5) 24. Qxc3 Rxc3 25. Rad1
f6 26. Rd3 Rc7 (26. .. Rxd3) 27. c4 Nc5 (27. .. Rc8) 28. Rd8+ (28. Re3) 28.
.. Kf7 29. Nd5 Red7 (29. .. Bxd5) 30. Rh8 Bxd5 31. exd5 Kg6 32. Re1 Ra7
(32. .. Rb7) 33. Re3 Rdb7 34. Rf8 (34. Ne4) 34. .. Rxb3 (34. .. Nxb3) 35.
Rxb3 Nxb3 36. Ne4 f5 (36. .. Nc1) 37. Nd6 (37. Nc3) 37. .. Nc1 38. Rxf5
(38. Nb5) 38. .. Nxa2 39. Rxe5 (39. Rf3 Nb4 40. Rg3+ Kh5 41. Rh3+ Kg4 42.
Rg3+ Kf4 43. Rf3+ Kg4 44. Rg3+ Kf4 45. Rf3+ Kg4 46. Rg3+ Kf4 47. Rf3+ Kg4
48. Rg3+ Kf4 49. Rf3+ Kg4 50. Rg3+ Kf4 51. Rf3+ Kg4 52. Rg3+ Kf4 53. Rf3+
Kg4 54. Rg3+) 39. .. Nb4 40. Re6+ (40. h4) 40. .. Kh5 41. Re5+ g5 42. Re1
a2 43. h3 a1=Q 44. Rxa1 Rxa1+ 45. Kf2 Ra3 46. Ne4 Rd3 47. g3 Kg6 48. Ke2
Rd4 49. Nd2 (49. Nd6) 49. .. h5 50. Nf1 (50. g4) 50. .. Nc2 (50. .. Re4+)
0-1
[/pgn]
Game analysis presented by the dabbaba-tool:
Code: Select all
[Event "Match"]
[Site "Copenhagen (Denmark)"]
[Date "1993.??.??"]
[Round "?"]
[White "Computer \"Deep Blue\""]
[Black "Hamann Svend (DEN)"]
[Result "0-1"]
[BlackElo "2000"]
[ECO "B92"]
[Opening "Sicilian"]
[Variation "Najdorf, 6.Be2 e5 7.Nb3 Be7 8.O-O O-O"]
[TimeControl "300"]
[Termination "normal"]
[PlyCount "100"]
[WhiteType "human"]
[BlackType "human"]
----- Error -------- Score IF This line was played
1. e4 . 0.04 0.20 e4.
.....c5 x . 0.07 0.16 e7-e5 Ng1-f3 Nb8-c6 Bf1-b5 Ng8-f6
2. Nf3 . 0.00 0.23 Ng1-f3 Nb8-c6 Bf1-b5 Ng8-f6 e4-e5 Nf6-d5 Nb1-c3
.....d6 x . 0.09 0.23 Nb8-c6 Bf1-b5 Ng8-f6 e4-e5 Nf6-d5 Nb1-c3 a7-a6 B
3. d4 . 0.00 0.32 Bf1-c4 e7-e6 Nb1-c3 Nb8-c6 d2-d4 c5xd4 Nf3xd4 Bf
.....cxd4 . 0.00 0.34 c5xd4 Nf3xd4 e7-e5
4. Nxd4 . 0.00 0.28 Nf3xd4 e7-e5 Bf1-b5+ Bc8-d7 Bb5xd7+ Qd8xd7 Nd4-f
.....Nf6 . 0.00 0.30 Ng8-f6 Nb1-c3 e7-e5 Bf1-b5+ Bc8-d7 Bb5xd7+ Qd8xd
5. Nc3 . 0.00 0.28 Nb1-c3 e7-e5
.....a6 . 0.00 0.32 e7-e5 Bf1-b5+ Bc8-d7 Bb5xd7+ Nb8xd7 Nd4-f5 Nd7-c
6. f4 oo . 0.11 0.31 Bf1-c4 g7-g6 Bc1-e3 Bf8-g7
.....Nbd7 . 0.05 0.20 e7-e5 Nd4-b3 Nb8-c6 Bf1-e2 Bf8-e7
7. Be2 . 0.04 0.25 Qd1-f3 e7-e5 Nd4-f5 b7-b5 Bf1-d3 b5-b4 Nc3-d5 Nf
.....e5 . 0.00 0.21 e7-e5 Nd4-b3 Bf8-e7 a2-a4 e5xf4 Bc1xf4 Nd7-e5
8. Nb3 . 0.01 0.15 7. .. e6 8. Bf3 Qc7 {%04Eval}
.....b5 . 0.00 0.14 Bf8-e7 a2-a4 b7-b6 Be2-d3 Bc8-b7
9. O-O . 0.00 -0.02 O-O Bc8-b7 Qd1-d3 Bf8-e7 a2-a4 b5-b4 Nc3-d5 Nf6x
.....Bb7 x . 0.06 0.00 Bc8-b7 a2-a4 b5-b4 Nc3-d5 Nf6xd5 e4xd5 Nd7-f6 Qd
10. Bf3 oo . 0.14 0.06 a2-a4 b5-b4 Nc3-d5 Nf6xd5 e4xd5 Nd7-f6 Qd1-e1 Qd
.....Be7 . 0.00 -0.08 Bf8-e7 a2-a3 Ra8-c8 Rf1-e1
11. Qe2 oo . 0.14 -0.08 a2-a3 Ra8-c8 Qd1-e2
.....O-O . 0.00 -0.22 O-O a2-a3
12. fxe5 oooo . 0.34 -0.22 a2-a3 Ra8-c8 Rf1-d1 h7-h6 Bc1-e3 e5xf4 Be3xf4 Rf
.....dxe5 xxxx . 0.31 -0.56 Nd7xe5 Bc1-e3 Ra8-c8 Ra1-d1 Ne5xf3+ g2xf3 Qd8-c7
13. Bg5 oooo . 0.39 -0.25 12. .. Nxe5 {-0.46|d9 Rybka4}
13. .. b4 . 0.00 -0.64 13. a3 {-0.18|d9 Rybka4}
14. Nd1 . 0.00 -0.71 Nc3-d1 a6-a5 c2-c4 b4xc3/ep b2xc3 a5-a4 Nb3-d2 h
.....a5 . 0.00 -0.71 a6-a5 c2-c4 b4xc3/ep b2xc3 a5-a4
15. Nf2 oooo . 0.34 -0.73 c2-c3 h7-h6 Bg5-h4 a5-a4 Nb3-d2 Bb7-a6 c3-c4 Nd7
.....a4 xxxxx. 0.51 -1.07 h7-h6 Bg5-h4 Bb7-a6 Nf2-d3 a5-a4 Nb3-c1 Qd8-c7 R
16. Nc1 oo . 0.11 -0.56 15. .. Ba6 {-0.93|d9 Rybka4}
.....a3 xx . 0.14 -0.67 h7-h6 Bg5-e3 a4-a3 b2-b3 Nd7-c5 Nc1-d3 Nc5xe4 Nf
17. b3 . 0.00 -0.53 b2-b3 h7-h6 Bg5-d2 Nd7-c5 Nc1-d3 Nc5xd3 c2xd3 Ra
.....Qc7 xxx . 0.17 -0.49 h7-h6 Bg5-d2 Nd7-c5 Nc1-d3 Nc5xd3
18. Ncd3 . 0.00 -0.32 17. .. h6 {-0.54|d9 Rybka4}
.....Rac8 . 0.01 -0.22 Nd7-c5 Nd3xb4 Nc5-e6 Bg5-d2 Rf8-d8 Qe2-e1 Ne6-d4
19. Bg4 o . 0.09 -0.21 Bg5-d2 Bb7-a6 Qe2-e3 Rf8-d8 Ra1-c1 Qc7-a5 Rf1-d1
.....Rce8 xxxx . 0.36 -0.30 Rc8-d8 Bg4-f3 h7-h6 Bg5-d2 Nd7-c5 Ra1-c1 Nc5xd3
20. Bxd7 . 0.00 0.06 19. .. Ba6 {-0.39|d9 Rybka4}
.....Nxd7 xxx . 0.22 0.06 Qc7xd7 Bg5xf6
21. Bxe7 . 0.00 0.28 20. .. Qxd7 {-0.12|d9 Rybka4}
.....Rxe7 . 0.02 0.28 Re8xe7 Nd3xb4 Qc7-c5 Nb4-d3 Qc5-d4 Ra1-e1
22. Nxb4 . 0.00 0.30 Nd3xb4 Qc7-c5 Nb4-d3 Qc5-d4 Rf1-e1
.....Qc3 x . 0.06 0.30 Qc7-c5 Nb4-d3 Qc5-d4 Rf1-e1 Nd7-f6
23. Qe1 . 0.00 0.36 Qe2-e1 Qc3-c5 Nb4-d3 Qc5-a7 Qe1-b4 Re7-e8 Kg1-h1
.....Rc8 xxxxxx 0.79 0.36 Qc3-c5 Nb4-d3 Qc5-a7
24. Qxc3 . 0.01 1.15 23. .. Qc5 {+0.35|d9 Rybka4}
.....Rxc3 . 0.00 1.14 Rc8xc3 Ra1-d1 Kg8-f8 Rd1-d3 Rc3xd3 Nb4xd3 Re7-e6
25. Rad1 . 0.00 1.14 Ra1-d1 Kg8-f8 Rd1-d3 Rc3xd3 Nb4xd3 Re7-e6 Rf1-d1
.....f6 xxx . 0.21 1.14 Kg8-f8 Rd1-d3 Rc3xd3 Nb4xd3 Re7-e6 c2-c4 Re6-d6
26. Rd3 o . 0.07 1.35 Rd1-d2 Nd7-b6
.....Rc7 xxxx . 0.39 1.28 Rc3-c8 Rd3-g3 Nd7-b8 Rf1-d1 Re7-d7 Rd1-d3 Rc8-d8
27. c4 . 0.03 1.67 26. .. Rxd3 {+1.08|d9 Rybka4}
.....Nc5 xxx . 0.15 1.64 Re7-e8 Rd3-c3
28. Rd8+ oooo . 0.39 1.79 27. .. Rc8 {+1.47|d9 Rybka4}
28. .. Kf7 . 0.00 1.40 28. Re3 {+1.63|d9 Rybka4}
29. Nd5 . 0.00 1.40 Nb4-d5 Bb7xd5 e4xd5 Re7-e8 Rd8xe8 Kf7xe8 b3-b4 N
.....Red7 xxxxx. 0.49 1.40 Bb7xd5 e4xd5 Re7-e8 Rd8xe8 Kf7xe8 b3-b4 Nc5-a6
30. Rh8 . 0.00 1.89 29. .. Bxd5 {+1.02|d9 Rybka4}
.....Bxd5 . 0.00 2.02 Bb7xd5 e4xd5 Kf7-g6 Rf1-d1 e5-e4 Rd1-e1 Rc7-b7 R
31. exd5 . 0.00 2.02 e4xd5 Kf7-g6 Rf1-d1 e5-e4 Rd1-e1 Rc7-b7 Rh8-a8 f
.....Kg6 xxx . 0.21 2.02 Kf7-g6 Rf1-d1
32. Re1 oo . 0.13 2.23 Rf1-d1 Rc7-a7 Nf2-d3 Nc5-e4 Rd1-c1 h7-h6 b3-b4 R
.....Ra7 xxxx . 0.33 2.10 h7-h6 Rh8-a8 Rc7-a7 Ra8xa7 Rd7xa7 b3-b4 Nc5-a4 N
33. Re3 ooooo. 0.45 2.43 32. .. Rb7 {+1.62|d9 Rybka4}
.....Rdb7 . 0.00 1.98 Rd7-b7 Nf2-e4 Rb7xb3 Re3xb3 Nc5xb3 c4-c5 Nb3-d4
34. Rf8 ooooooo 1.66 1.93 Nf2-e4 Rb7xb3 Re3xb3 Nc5xb3 c4-c5 Nb3-d4 c5-c6 N
34. .. Rxb3 xxxxxx 1.10 0.27 34. Ne4 {+1.72|d9 Rybka4}
35. Rxb3 oooo . 0.27 1.37 34. .. Nxb3 {+0.11|d9 Rybka4}
.....Nxb3 xxxx . 0.27 1.10 Nc5xb3 Nf2-e4 Nb3-c1 Ne4-c3 Nc1-d3 Rf8-c8 Kg6-f7
36. Ne4 oooo . 0.27 1.37 Nf2-e4 Nb3-c1 Ne4-c3 Nc1-d3 Rf8-c8
.....f5 xxxxx. 0.66 1.10 Nb3-c1 Ne4-c3 Nc1-d3 Rf8-c8
37. Nd6 ooooo. 0.57 1.76 36. .. Nc1 {+0.78|d11 Rybka4}
37. .. Nc1 xxx . 0.17 1.19 37. Nc3 {+1.02|d11 Rybka4}
38. Rxf5 ooooooo 1.36 1.36 Nd6-b5 Ra7-b7 d5-d6 e5-e4
38. .. Nxa2 . 0.00 0.00 38. Nb5 {+0.80|d11 Rybka4}
39. Rxe5 ooooooooo 3.00 0.00 Rf5-f3 Na2-b4 Rf3-g3+ Kg6-h5 Rg3-h3+ Kh5-g4 Rh3-
39. .. Nb4 . 0.00 -3.22 39. Rf3 {%00þ} Nb4 {%00þ} 40. Rg3+ {%00þ} Kh5 {%
40. Re6+ ooooo. 0.51 -3.33 h2-h4 h7-h6 h4-h5+ Kg6-h7
40. .. Kh5 . 0.00 -3.84 40. h4 {-2.54|d11 Rybka4}
41. Re5+ oo . 0.12 -3.98 Re6-e5+ g7-g5 Re5-e1 a3-a2 Re1-d1 a2-a1Q Rd1xa1
.....g5 xx . 0.14 -4.10 g7-g5 Re5-e1 a3-a2 Re1-d1 Ra7-a6 Nd6-c8 a2-a1Q R
42. Re1 ooo . 0.16 -3.96 Re5-e1 a3-a2 Re1-d1 Ra7-a6 Nd6-e4
.....a2 . 0.00 -4.12 a3-a2 Re1-d1 Ra7-a6 Nd6-e4
43. h3 ooooooooo 3.00 -4.12 Re1-d1 Ra7-a6 Nd6-e4 a2-a1Q Rd1xa1 Ra6xa1+ Kg1-f
.....a1=Q xxxxxxxxx 3.00 -8.67 Nb4-c2 Re1-c1 Ra7-e7 Kg1-f2 Re7-e1 Rc1xc2 a2-a1Q
44. Rxa1 oooo . 0.30 -4.53 Re1xa1 Ra7xa1+ Kg1-f2 Ra1-a2+ Kf2-f3 Kh5-g6 Kf3-
.....Rxa1+ xxxx . 0.27 -4.83 Ra7xa1+ Kg1-f2 Ra1-a2+ Kf2-g3 Ra2-a3+ Kg3-f2 Kh5
45. Kf2 oooo . 0.27 -4.56 Kg1-f2 Ra1-a2+ Kf2-e3
.....Ra3 xxxx . 0.25 -4.83 Ra1-a2+ Kf2-g3 Ra2-a3+ Kg3-f2 Kh5-g6 Kf2-e2 Ra3-
46. Ne4 ooooo. 0.55 -4.58 Nd6-b7 Ra3-a7 Nb7-d6 Ra7-a2+ Kf2-e3 Ra2xg2
.....Rd3 xx . 0.11 -5.13 Kh5-g6 Ne4-d6 Ra3-c3 g2-g4 Rc3xh3 Kf2-g2 Rh3-c3
47. g3 o . 0.08 -5.02 Kf2-e2 Kh5-g6 Ne4-d6 Rd3-c3 Ke2-f2 Rc3-b3 g2-g3
.....Kg6 . 0.00 -5.10 Kh5-g6 Ne4-d6 Rd3-c3
48. Ke2 oooooo 0.86 -5.37 Kf2-g2 Rd3-d4 Ne4-d6 Nb4-c2 Kg2-f2 Rd4-d2+ Kf2-f
.....Rd4 xxxxxx 0.78 -6.23 Kg6-f5 Ne4-d6+ Kf5-e5 Nd6-f7+ Ke5-d4 d5-d6 Rd3xg
49. Nd2 ooooo. 0.60 -5.45 Ne4-d6 Kg6-f6 Ke2-e3 Rd4-d3+ Ke3-f2 Rd3-b3 Nd6-e
49. .. h5 . 0.00 -6.05 49. Nd6 {-4.44|d11 Rybka4}
50. .. Nc2 no-score-to-evaluate -6.42 50. .. Re4+ {-6.73|d11 Rybka4}
White Black
Total error 16.41 11.39
Evaluated moves 49 49
Error/move 0.335 0.232
Performancerating 1471 1899
- positional (err<0.70) 2410 2552