Simply in Awe...

[fern]

Stockfish reach a deep of 25 plys even in middle game.....Clearly the amouint of prunning is huge and that means the amount of knowledge and/or innovative search techniques is huge.
Am I right?

Fern

[Dr.Wael Deeb]

Fernando,you're looking great on that avatar....can I use your photo as an avatar for my Facebook so I can get more chicks to add me in their accounts
I am talking seriously and hey,I will not pay you a penny,bear that in mind....
Dr.D

[kgburcham]

[D] rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -

Stockfish
27.01 0:50 +0.32 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.d3 Qd7 (459.962.319) 9148

FireBird 1.2 x64
23.20 0:46 +0.17 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6 6.Nf3 O-O (548.033.625) 11804

Deep Sjeng 3.0
20/47 0:46 +0.06 1.d4 d5 2.Bf4 Nf6 3.Nc3 c5 4.e3 c4 5.Nf3 Nc6 6.Be2 h6 (520.234.823) 11171

Deep Shredder 12 x64
21/52 0:46 +0.40 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 6.d4 exd4 (236.873.104) 5074

Rybka 3
19.01 0:48 +0.15 1.e4 e6 2.Nf3 d5 3.exd5 exd5 4.d4 Bd6 5.Bd3 Qe7+ 6.Be3 Nf6 (16.827.003) 353

[IanO]

Stockfish reach a depth of 25 plys even in middle game.....Clearly the amount of pruning is huge and that means the amount of knowledge and/or innovative search techniques is huge.
Am I right?

Fern

I also am astonished by the beauty and sharpness of the games played by Stockfish. I'm used to seeing slightly stronger engines grinding out technical wins against slightly weaker engines, converting pawn or positional advantages in long endgames. Instead I'm seeing wild tactical blowouts in almost every game. Here are a couple of examples of speed chess against HIARCS:

[Event "?"]
[Site "?"]
[Date "2010.04.12"]
[Round "?"]
[White "Stockfish 1.7.1 64bit"]
[Black "HIARCS 12.1 MP"]
[Result "1-0"]
[ECO "B22"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 Qc7 8. O-O
Nxe5 9. Nxe5 Qxe5 10. Re1 Qd5 11. a4 d6 12. a5 Nd7 13. b3 Nf6 14. bxc4 Qxc4 15.
Na3 Qc5 16. d4 Qxa5 17. Nb5 Qb6 18. Bf4 Kd8 19. c4 Bd7 20. Ba4 Bc6 21. c5 Qa6
22. Qb3 Nd5 23. Bg3 e6 24. Bh4+ Kc8 25. cxd6 Kd7 26. Bg3 Rc8 27. Qf3 Nf6 28.
Nxa7 b5 29. Nxc6 Qxc6 30. d5 exd5 31. Bxb5 Qxb5 { Adjudicated: White wins
(score -15.39) } 1-0

[Event "?"]
[Site "?"]
[Date "2010.04.12"]
[Round "?"]
[White "Stockfish 1.7.1 64bit"]
[Black "HIARCS 12.1 MP"]
[Result "1-0"]
[ECO "B80"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. Qd2
Nbd7 9. g4 b4 10. Na4 h6 11. O-O-O Ne5 12. Qxb4 Bd7 13. Bf4 g5 14. Bd2 Rb8 15.
Qa3 a5 16. Bc3 Qc7 17. Be1 Qa7 18. b3 d5 19. Qb2 Bxa4 20. Bg3 Nfd7 21. exd5
exd5 22. h4 gxh4 23. Bxh4 f6 24. f4 Nxg4 25. Bg2 Be7 26. Rhe1 Qc7 27. Rxe7+
Kxe7 28. Re1+ Nde5 29. fxe5 Bd7 30. Bxd5 Kf8 31. exf6 Rb6 32. Nf5 Qf4+ 33. Kb1
Qd2 { Adjudicated: White wins (score -13.27) } 1-0

It feels like I've got Fischer in my pocket! (Caveat: I may be easily impressed; I haven't seen much of Naum or Rybka's recent play style.)

I am likewise impressed by its new book. Stockfish 1.7.1 is often staying in book many moves longer than its opponents. I've even seen it go 10 - 15 moves into book when the opponent is bookless!

Ian

[Eraserheads]

The second game is quite bewitching... At first it would seem that SF has blundered a piece by allowing a pin on the b-file...then in just a few moves SF gets an attack on the other side, and Hiarcs had to give back the piece...Magical!

[gerold]

Stockfish reach a deep of 25 plys even in middle game.....Clearly the amouint of prunning is huge and that means the amount of knowledge and/or innovative search techniques is huge.
Am I right?

Fern

I have been testing Stockfish for a couple weeks.
It is very strong and does take a few chances and
mounts a really strong attack sometimes. Sometimes
it works other times it does not.
It is still weak in the end game.

Best to you,
Gerold.

P.S. Some of the most interesting games i have seen is
between it a Rybka..

[Marc MP]

Stockfish reach a depth of 25 plys even in middle game.....Clearly the amount of pruning is huge and that means the amount of knowledge and/or innovative search techniques is huge.
Am I right?

Fern

I also am astonished by the beauty and sharpness of the games played by Stockfish. I'm used to seeing slightly stronger engines grinding out technical wins against slightly weaker engines, converting pawn or positional advantages in long endgames. Instead I'm seeing wild tactical blowouts in almost every game. Here are a couple of examples of speed chess against HIARCS:

[Event "?"]
[Site "?"]
[Date "2010.04.12"]
[Round "?"]
[White "Stockfish 1.7.1 64bit"]
[Black "HIARCS 12.1 MP"]
[Result "1-0"]
[ECO "B22"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 Qc7 8. O-O
Nxe5 9. Nxe5 Qxe5 10. Re1 Qd5 11. a4 d6 12. a5 Nd7 13. b3 Nf6 14. bxc4 Qxc4 15.
Na3 Qc5 16. d4 Qxa5 17. Nb5 Qb6 18. Bf4 Kd8 19. c4 Bd7 20. Ba4 Bc6 21. c5 Qa6
22. Qb3 Nd5 23. Bg3 e6 24. Bh4+ Kc8 25. cxd6 Kd7 26. Bg3 Rc8 27. Qf3 Nf6 28.
Nxa7 b5 29. Nxc6 Qxc6 30. d5 exd5 31. Bxb5 Qxb5 { Adjudicated: White wins
(score -15.39) } 1-0

[Event "?"]
[Site "?"]
[Date "2010.04.12"]
[Round "?"]
[White "Stockfish 1.7.1 64bit"]
[Black "HIARCS 12.1 MP"]
[Result "1-0"]
[ECO "B80"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. Qd2
Nbd7 9. g4 b4 10. Na4 h6 11. O-O-O Ne5 12. Qxb4 Bd7 13. Bf4 g5 14. Bd2 Rb8 15.
Qa3 a5 16. Bc3 Qc7 17. Be1 Qa7 18. b3 d5 19. Qb2 Bxa4 20. Bg3 Nfd7 21. exd5
exd5 22. h4 gxh4 23. Bxh4 f6 24. f4 Nxg4 25. Bg2 Be7 26. Rhe1 Qc7 27. Rxe7+
Kxe7 28. Re1+ Nde5 29. fxe5 Bd7 30. Bxd5 Kf8 31. exf6 Rb6 32. Nf5 Qf4+ 33. Kb1
Qd2 { Adjudicated: White wins (score -13.27) } 1-0

It feels like I've got Fischer in my pocket! (Caveat: I may be easily impressed; I haven't seen much of Naum or Rybka's recent play style.)

I am likewise impressed by its new book. Stockfish 1.7.1 is often staying in book many moves longer than its opponents. I've even seen it go 10 - 15 moves into book when the opponent is bookless!

Ian

The new Stockfish is the shrewed king hunter for sure! Here an ultra fast game (1m+1s) against world's #1 at this time control:

[Event "SF171 vs Robbolito 0.085g3"]
[Site "HERE"]
[Date "2010.04.18"]
[Round "1.1"]
[White "Stockfish 1.7.1 JA"]
[Black "Robbolito 0.085g3"]
[Result "1-0"]
[TimeControl "60+1"]
[FEN "rn1qkb1r/3ppp1p/b4np1/2pP4/8/2N5/PP2PPPP/R1BQKBNR w KQkq - 0 1"]
[SetUp "1"]
[Number "10"]

{--------------
r n . q k b . r
. . . p p p . p
b . . . . n p .
. . p P . . . .
. . . . . . . .
. . N . . . . .
P P . . P P P P
R . B Q K B N R
white to play
--------------}
1. Nh3 {+0.60/13 2.6} d6 {-0.09/15 2.5} 2. e4 {+0.48/15 2.8} Bxf1
{-0.09/15 1.3} 3. Rxf1 {+0.52/16 6} Bg7 {-0.01/15 3} 4. f3 {+0.36/15 1.8}
Qb6 {+0.05/14 2.7} 5. Rf2 {+0.40/14 1.8} Nfd7 {+0.17/13 2.0} 6. Kf1
{+0.40/12 2.7} Bd4 {+0.17/13 0.8} 7. Re2 {+0.52/13 2.5} Ne5 {+0.04/14 3} 8.
Bh6 {+0.76/13 5} Nbd7 {-0.23/14 17} 9. a4 {+0.60/12 1.6} Nc4 {-0.23/13 0.7}
10. Nb5 {+0.76/12 1.8} Bxb2 {-0.30/14 3} 11. Rb1 {+0.76/12 1.5} Bf6
{-0.28/14 0.6} 12. Nf2 {+1.17/13 2.4} Qd8 {-0.40/13 6} 13. e5
{+1.69/13 2.4} dxe5 {-0.86/12 3} 14. Ne4 {+2.90/11 1.5} Ndb6 {-1.82/13 13}
15. d6 {+3.43/12 1.9} Rc8 {-1.83/12 1.6} 16. Ra1 {+4.20/12 5} exd6
{-1.85/12 2.7} 17. a5 {+5.33/12 1.9} d5 {-2.92/12 2.1} 18. Nxf6+
{+6.14/13 2.1} Qxf6 {-2.92/11} 19. axb6 {+6.62/8 0.2} Nxb6 {-3.70/12 6} 20.
f4 {+7.91/13 2.0} e4 {-5.40/12 3} 21. Rxe4+ {+8.84/13 2.0} dxe4
{-6.04/13 1.8} 22. Nd6+ {+9.01/14 1.5} Ke7 {-6.38/14 1.9}
{Black resigns} 1-0

Impressive killer instinct!

[notyetagm]

Great results for Stockfish 1.7!

Please post more PGNs of Stockfish's play.

Thanks

[Martin Thoresen]

You can find more Stockfish games here:

http://www.talkchess.com/forum/viewtopic.php?t=33759

[royb]

Great results for Stockfish 1.7!

Please post more PGNs of Stockfish's play.

Thanks

Here are a few more from a match between SF-1.7 64-bit and Rybka-3 32-bit. I intended the match to be between these two both using 64-bit engines but I made a mistake. Still, impressive to see how SF gets the upper hand vs Rybka in these games. To be fair, Rybka put up a good fight in some games (see last game for a quick knock-out by R3).

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.18"]
[Round "18"]
[White "Stockfish 1.7 64bit"]
[Black "Rybka 3 1-cpu 32-bit"]
[Result "1-0"]
[TimeControl "120+5"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 Nxc3
8. bxc3 Be7 9. e4 O-O 10. Bd3 c5 11. O-O Qc8 12. Qa2 Rd8 13. Rd1 c4 14. Bc2
Nd7 15. Bf4 Nf6 16. Re1 Nh5 17. Bd2 Qc7 18. a4 Nf6 19. Qb1 h6 20. e5 Nd5
21. Re4 Kh8 22. Qd1 Rac8 23. Rg4 Ra8 24. Rg3 Re8 25. h4 Bf8 26. h5 Ne7 27.
Nh4 Nd5 28. Qg4 Ne7 29. Bc1 Bd5 30. Ba3 Kg8 31. Qf4 f5 32. Qxh6 Qd7 33. Qg5
Kh7 34. h6 Nc6 35. Bxf8 Re7 36. hxg7 Kg8
{Black resigns} 1-0

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.18"]
[Round "24"]
[White "Stockfish 1.7 64bit"]
[Black "Rybka 3 1-cpu 32-bit"]
[Result "1-0"]
[TimeControl "120+5"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8.
Qd2 Nbd7 9. g4 Nb6 10. a4 Nc4 11. Bxc4 bxc4 12. a5 Qc7 13. b4 cxb3 14. cxb3
e5 15. Nf5 Bxf5 16. gxf5 g6 17. Bg5 Be7 18. Bxf6 Bxf6 19. Nd5 Bh4+ 20. Kf1
Qd7 21. Nb6 Qb5+ 22. Kg2 Rb8 23. Kh3 Qxb3 24. Kxh4 Qxf3 25. Raf1 Qxe4+ 26.
Kh3 O-O 27. Rhg1 Rfd8 28. f6 Rxb6 29. axb6 h5 30. Qh6 Qd3+ 31. Kg2 Qe4+ 32.
Rf3 Qg4+
{Black resigns} 1-0

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.18"]
[Round "39"]
[White "Rybka 3 1-cpu 32-bit"]
[Black "Stockfish 1.7 64bit"]
[Result "0-1"]
[TimeControl "120+5"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.
Bd3 Bb7 9. O-O a6 10. e4 c5 11. d5 Qc7 12. Re1 c4 13. Bc2 Bd6 14. Bg5 Rd8
15. Bxf6 gxf6 16. g3 Rg8 17. Rb1 Rg7 18. Qe2 Kf8 19. Rbd1 Kg8 20. Nd4 Nc5
21. Ncxb5 axb5 22. Nxb5 Qb8 23. Nxd6 Rxd6 24. Qxc4 Nd7 25. Qb4 Ne5 26. Re3
h5 27. a4 Rd7 28. a5 Qa8 29. Rb3 h4 30. Qb6 hxg3 31. hxg3 Rh7 32. f4 Qf8
33. fxe5 Qh6 34. Rc3 exd5 35. e6 d4 36. exf7+ Kxf7 37. Kg2 Qh2+ 38. Kf3 Rh3
39. Kg4 Bc8 40. Qb8 dxc3 41. Bb3+ Ke7 42. Rxd7+
{White resigns} 0-1

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.18"]
[Round "43"]
[White "Rybka 3 1-cpu 32-bit"]
[Black "Stockfish 1.7 64bit"]
[Result "0-1"]
[TimeControl "120+5"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 Nc6 7. Bd3 e5 8.
Ne2 e4 9. Bb1 O-O 10. O-O Re8 11. Ba2 b6 12. Qa4 Na5 13. Rd1 Ba6 14. Ng3
Qc7 15. Bb2 Qc6 16. Qxc6 dxc6 17. Nf5 Rad8 18. dxc5 bxc5 19. Nd6 Re7 20.
Nf5 Red7 21. Re1 Bxc4 22. Ng3 Rd2 23. Bxc4 Nxc4 24. Bc1 Rc2 25. Rb1 g6 26.
Kf1 Rxc3 27. Rb7 Rc2 28. h3 a5 29. Ne2 Kg7 30. g4 h6 31. Nf4 Rd7 32. Rb1
Nd5 33. Ne2 f6 34. Nf4 Nc3 35. Rb8 Kf7 36. a4 g5 37. Nh5 Nd1 38. Rh8 Ne5
39. Kg2 Nxf2 40. Kg3 Nfd3 41. Rf1 Nxc1 42. Rxf6+
{White resigns} 0-1

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.19"]
[Round "70"]
[White "Stockfish 1.7 64bit"]
[Black "Rybka 3 1-cpu 32-bit"]
[Result "1-0"]
[TimeControl "120+5"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 Nxc3
8. bxc3 Be7 9. e4 Nd7 10. Bd3 c5 11. O-O Qc7 12. Qe2 O-O 13. Bb2 Rac8 14.
Rad1 Rfd8 15. Nd2 h6 16. f4 cxd4 17. cxd4 Nf6 18. f5 exf5 19. Rxf5 Qd7 20.
Kh1 Qe6 21. Rdf1 Qa2 22. Nb1 Rf8 23. d5 Ne8 24. R5f3 Qb3 25. Bd4 Qa4 26.
Ba1 f6 27. Nc3 Qxa3 28. e5 fxe5 29. Nb5 Qb4 30. Nxa7 Ra8 31. Nc6 Bxc6 32.
dxc6 Nf6 33. Bxe5 Rfe8 34. c7 Bd6 35. c8=Q Raxc8 36. Qa2+ Kh8 37. Bxf6 Rc7
38. Bxg7+ Rxg7 39. Rf6 Qh4
{Black resigns} 1-0

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.19"]
[Round "75"]
[White "Rybka 3 1-cpu 32-bit"]
[Black "Stockfish 1.7 64bit"]
[Result "0-1"]
[TimeControl "120+5"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4
8. Bxc4 c5 9. Bb2 Qc7 10. Bd3 Nc6 11. Nf3 e5 12. Qc2 cxd4 13. cxd4 e4 14.
Bxe4 Nxe4 15. Qxe4 Qa5+ 16. Nd2 Bf5 17. Qf3 Rac8 18. d5 Ne7 19. d6 Ng6 20.
Bd4 Rc2 21. Rd1 Bd3 22. Qxb7 Nh4 23. Rg1 Ba6 24. Qb3 Qh5 25. f3 Nf5 26. Qa4
Qh4+ 27. g3 Qxh2 28. Qxa6 Qxg1+ 29. Qf1 Qxg3+ 30. Qf2 Qxd6 31. Bxa7 Rd8 32.
e4 Ng3 33. Be3 Rd7 34. Rb1 f5 35. exf5 Qxa3 36. Kd1 Qd3 37. Ke1 Rb7 38. Ra1
Rxd2 39. Bxd2
{White resigns} 0-1

# Here, *Rybka* develops a killing attack very quickly. Surely Stockfish missed
# something here.

[Event "Computer Chess Game"]
[Site "ubuntu01"]
[Date "2010.04.19"]
[Round "61"]
[White "Rybka 3 1-cpu 32-bit"]
[Black "Stockfish 1.7 64bit"]
[Result "1-0"]
[TimeControl "120+5"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 dxc4 5. e4 b5 6. a4 c6 7. e5 h6 8. Bd2
Ne4 9. Be2 Nxd2 10. Qxd2 Be7 11. Nc3 Qd7 12. O-O O-O 13. Ne4 Na6 14. b3
cxb3 15. Nf6+ gxf6 16. Qxh6 b2 17. Ra3 b1=Q 18. Rxb1 Re8 19. Ng5 fxg5
{Black resigns} 1-0