Komodo vs GM Martin Petr (2515)

[Jesse Gersenson]

A 6 game 2-pawn handicap match is being played now in the center of Prague.

Online broadcast at:
http://komodochess.com/games/Live.html

[Ferdy]

A 6 game 2-pawn handicap match is being played now in the center of Prague.

Online broadcast at:
http://komodochess.com/games/Live.html

I can't connect, could you post the game records?

[mjlef]

A 6 game 2-pawn handicap match is being played now in the center of Prague.

Online broadcast at:
http://komodochess.com/games/Live.html

First game is done. A draw. Here:

http://komodochess.com/games/Martin-Petr-round-1.pgn

[musketeerchess]

Komodo's opening play could be better enhanced. The main weakness against good GM in 2 pawn odds is that it does not evaluate the position efficiently and it does not choose the best strategy. When u r 2 pawns down you have to avoid long stretegical battles. When exchanging you must consider the remaining pieces as more valuable for the opponent after the exchange which will temper the potential advantage that will be gained after exchanges. I suggest that KOMODO has different evaluation at the opening and that it considers evaluation of the remaining pieces when the advantage of the opponent is more than 125 cpawns as follows: When we exchange the remaining pieces of the opponent will get more and more value 3 centipawns for pawns 4-5 cp for light piece (Bishop or Knight the value of this plus depends on the nature of the position) and may be 7-12 cp for Rook (depending if it controls lines etc) and for the Queen 15-20 cp. If you evaluate the position like this you'll see the engine will change it's calculations.

[Laskos]

Contempt is set at +50, right?

[lkaufman]

Komodo's opening play could be better enhanced. The main weakness against good GM in 2 pawn odds is that it does not evaluate the position efficiently and it does not choose the best strategy. When u r 2 pawns down you have to avoid long stretegical battles. When exchanging you must consider the remaining pieces as more valuable for the opponent after the exchange which will temper the potential advantage that will be gained after exchanges. I suggest that KOMODO has different evaluation at the opening and that it considers evaluation of the remaining pieces when the advantage of the opponent is more than 125 cpawns as follows: When we exchange the remaining pieces of the opponent will get more and more value 3 centipawns for pawns 4-5 cp for light piece (Bishop or Knight the value of this plus depends on the nature of the position) and may be 7-12 cp for Rook (depending if it controls lines etc) and for the Queen 15-20 cp. If you evaluate the position like this you'll see the engine will change it's calculations.

We already have code to avoid exchanging when behind and also when Contempt is set.

[lkaufman]

Contempt is set at +50, right?

+60

[mjlef]

Round 2 is here:

http://komodochess.com/games/Martin-Petr-round-2.pgn

[mjlef]

Komodo won the third game:

[pgn][Event "Prague Odds Matches"]
[Site "Prague (Hotel Julis)"]
[Date "2015.08.23"]
[Round "3"]
[White "Komodo"]
[Black "Martin Petr"]
[Result "1-0"]
[BlackElo "3300"]
[WhiteElo "2515"]
[TimeControl "45+15"]
[SetUp "1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/1PPP1PPP/RNBQKBNR w KQkq - 0 1"]

1. d4 (d4 Nf6 Nf3 e6 Bd3 Be7 O-O b6 Re1 O-O h3 a5 Bf4 d6 Nbd2 Nbd7 Nf1 Nd5
Bg3 Bb7 c3 N7f6 N3d2 Bc6 Ne3 Nxe3 Rxe3 g6) {-0.60/27 66} Nf6 2. Nf3 (Nf3 e6
Bd3 Be7 O-O b6 Bf4 a5 Na3 O-O Qe2 Ba6 Nc4 Nd5 Bd2 Nc6 c3 f5 h3 Qe8 Rfe1 Qc8
Red1 Qb7 g3 h6 Nfe5 Nxe5 Nxe5 Bxd3 Qxd3 c6) {-0.67/29 98} e6 3. Bd3 (Bd3
Be7 c3 b6 Na3 a5 Nc2 Ba6 O-O O-O Bf4 Bxd3 Qxd3 Nc6 Ne5 Nd5 Bg3 Nxe5 dxe5
Bc5 c4 Ne7 Rad1 Nf5 Ne3 Nd4 Nc2 Nxc2 Qxc2 d5 exd6 cxd6 Rfe1 Qd7) {-0.75/28
74} Be7 4. O-O (O-O b6 c3 a5 h3 Ba6 Re1 O-O Be2 d6 Bf4 h6 Na3 Bxe2 Qxe2 c6
c4 Na6 Nc2 Qd7 Bg3 Qb7 Red1 Nb4 Nxb4 axb4 Nd2 c5) {-0.80/28 72} b6 5. Re1
(Re1 a5 Nbd2 Ba6 Ne4 Nxe4 Rxe4 O-O c3 Bxd3 Qxd3 d5 Rg4 f5 Ng5 Rf6 Rg3 Bd6
f4 Nd7 Bd2 Nf8 Re1 Qe8 c4 Ng6 cxd5 Nxf4 Bxf4 Bxf4 dxe6 Bxg3 hxg3 h6 Nf3)
{-0.83/29 91} Bb7 6. Bf4 (Bf4 O-O c3 d6 Na3 a5 h3 Nbd7 Bh2 Nd5 Nc4 h6 Bg3
N7f6 Ne3 Nxe3 Rxe3 c5 dxc5 bxc5 Nd2 d5 Nf3 Qb6 Bc2 Ne4 Ne5 Rad8 Qc1 Nxg3
Rxg3 Bg5 f4 c4 Kh2) {-0.83/30 143} d6 7. Bg3 (Bg3 a5 h3 O-O c3 Nbd7 Na3 Nd5
Bb5 N7f6 Nd2 g6 Bh2 Kg7 Qf3 c6 Bd3 b5 c4 Nb4 Be2 bxc4 Ndxc4 Nbd5 Nc2 Qc7
N2e3 c5 Nxd5 Nxd5 dxc5) {-0.88/29 145} Nbd7 8. Qe2 (Qe2 O-O Nc3 h6 h3 Qc8
Nd1 Nd5 Ne3 N7f6 Nxd5 Nxd5 c3 a5 Bc2 Nf6 Bf4 c5 dxc5 Qxc5 Be3 Qc6 Ba4 Qc7
Nd4 Nd5 Bd2 Bg5 Nb5 Qe7 Bc2 Nf4 Bxf4) {-0.84/29 133} O-O 9. h3 (h3 Nd5)
{-0.97/30 108} a5 10. Nc3 (Nc3 Nb8 Nb1 Na6 c3 c5 Nbd2 cxd4 Nxd4 Nc5 Bc2 g6
N4b3 Nxb3 Bxb3 Bc6 Ba4 Bxa4 Rxa4 Nh5 Bh2 Qd7 Raa1 Qc6 Nf3 e5 Nd4 exd4 Qxe7
dxc3 bxc3 Rae8 Qxd6 Qxc3) {-0.97/29 74} Nd5 11. Nxd5 (Nxd5 Bxd5 c3 Nf6 Nh2
Bc6 Ng4 Nxg4 hxg4 Bh4 Bf4 h6 Bc2 Bg5 Bg3 Re8 f4 Bf6 Bd3 Bd5 Qd2 g6 Bb5 c6
Bd3 b5) {-0.75/24 37} Bxd5 12. c3 (c3 Bb7 Qc2 Nf6 Nh2 Kh8 Rad1 h6 Qe2 Kg8
Ra1 Nd5 Ng4 Qd7 Ne3 Nxe3 Qxe3 Bg5 Qe2 Qe7 f4 Bh4 Qg4 Bxg3 Qxg3 f5)
{-0.78/24 13} Bb7 13. Qc2 (Qc2 Nf6 Nh2 Kh8 Qe2 Ra7 Bh4 h6 Nf1 Nd5 Bg3 Bg5
Nh2 Qa8 h4 Be7 f3 Qd8 Nf1 Nf6 Bf2 Nh5 g3 Nf6 Be3 Qa8 Nd2 Bc6 Bc2 Nd5 Qd3)
{-0.85/27 84} g6 14. Qd1 (Qd1 Bf6 Nh2 Bg7 Bb5 Rc8 Qd2 Nf6 Bh4 h5 Nf1 c5
dxc5 Rxc5 Bd3 Qc7 f3 Nd7 Bf2 Re5 Ne3 Nc5 Bc2 f5 b4 axb4 cxb4 f4 bxc5 fxe3
Bxe3 Rd5 Qe2 Bxa1) {-0.90/27 124} Bf6 15. Nd2 (Nd2 Bg7 Bb5 Nf6 Bh4 c6 Be2
Qc7 Bf3 b5 Qe2 a4 Bg3 Rfd8 Ne4 Nxe4 Qxe4 Re8 Qc2 e5 dxe5 dxe5 Rad1 c5 Bxb7
Qxb7 Rd6 Rad8 Rxd8) {-1.02/27 79} Bg7 16. Bb5 (Bb5 Nf6 Bh4 c6 Be2 Qc7 Bf3
e5 Nc4 e4 Be2 Nd5 Bg3 Rfd8 Ne3 Nxe3 fxe3 Ba6 Bxa6 Rxa6 Qc2 Qe7 Qe2 b5 b3 d5
c4 dxc4 bxc4 b4 c5 Ra7) {-1.06/28 1} Nb8 17. Bd3 (Bd3 Bc6 Nc4 Nd7 Qd2 Re8
Bf4 Nf6 Bg5 Qd7 Ne3 Nd5 Be2 Nxe3 Bxe3 Bd5 c4 Bc6 Qc3 Bb7 Bd1 c5 Ba4 Bc6
Bxc6 Qxc6 Qd3 cxd4 Bxd4 Bxd4) {-0.98/26 109} Nd7 18. Bb5 (Bb5) {0.00/50
123} c6 19. Bf1 (Bf1 d5 Nf3 Ba6 Bxa6 Rxa6 h4 Nf6 Bf4 b5 Bg5 Qc7 Bxf6 Bxf6
h5 a4 Ne5 c5 Qf3 Bg7 Ng4 f5 Ne5 Bxe5 Rxe5 cxd4 cxd4 Qc2 Qa3 Rc8) {-0.91/27
86} e5 20. Ne4 (Ne4 Qe7 dxe5 dxe5 Bh4 Qxh4 Qxd7 Rab8 Rad1 Ba8 Qc7 Rb7 Qxc6
Rbb8 Qc7 Bxe4 g3 Qf6 Rxe4 Rfc8 Qa7 Rd8 Rde1 Qf5 R4e3 Qc8 Rd3 Rxd3 Bxd3 Qb7
Qxb7 Rxb7 Bb5 f5 Bc4 Kf8 g4 fxg4 hxg4 Rd7 Kg2 Rd2 Re2 Rxe2 Bxe2 e4 f3 exf3
Kxf3 Ke7) {-0.39/33 58} Qc7 21. dxe5 (dxe5 dxe5 Bh4 Nc5 Nxc5 bxc5 Qf3 Ba6
Bxa6 Rxa6 Red1 Raa8 Qe3 Qb6 Rd2 f6 Rad1 Kh8 f3 Qb5 Rd7 c4 Qd2 Rab8 Qd6 g5
Bf2 Qxb2 Qc7 Qc2 Qxa5 Rb1 Rxb1) {-0.32/27 29} dxe5 22. Bh4 (Bh4 Nc5 Nxc5
bxc5 Bg5 Rfb8 Qd2 Ba6 Bxa6 Rxa6 Red1 Qb7 Qd3 Qb5 Qe4 Ra7 g4 c4 Be3 Raa8 Rd2
Rd8 Rad1 Rxd2 Rxd2 Rf8 g5 f5 gxf6 Bxf6 Rd6 Qxb2 Qxc6 Qb1 Kh2 Qf5 Qxc4 Kh8
Rd5 Qf3 Rxa5) {-0.40/32 123} Ba6 23. Bxa6 (Bxa6 Rxa6 Re2 b5 Rd2 Nb6 Bd8 Qa7
Nc5 Nc4 Nxa6 Nxd2 Qxd2 Qxa6 Rxa5 Qb7 Bg5 Re8 Kh2 Bf8 Be3 Qc8 Ra7 Rd8 Qc2
Qe6 Bb6 Rd7 Ra8 Qd5 Be3 f5 f3 Rd8 Ra7 e4 fxe4 Bd6 Kg1) {-0.28/30 33} Rxa6
24. Qe2 (Qe2 Raa8 Rad1 Nc5 Nxc5 bxc5 Qe4 a4 Re2 Qb7 Bg5 f6 Bc1 Rad8 Rxd8
Rxd8 Qxa4 f5 Re1 Rd5 Be3 e4 Qa2 Bf8 Ra1 h6 Kh2 g5 g3 Bd6 Qa7 Qxa7 Rxa7 c4
Bd4 Bf8) {-0.46/32 111} Ra7 25. Red1 (Red1 Nc5 Nxc5 bxc5 Bg5 Qb6 Rd2 Qb5
Be3 Raa8 Qxb5 cxb5 Bxc5 Rfc8 Be7 e4 g4 Re8 Rd7 b4 cxb4 axb4 Rxa8 Rxa8 Bxb4
Bxb2 Kg2 Bf6 Bd2 Rd8 Rxd8 Bxd8 f3 exf3 Kxf3 Kg7 Ke4 Kf6 Kd5 Bb6 h4)
{-0.37/31 68} Re8 26. Rd6 (Rd6 Nc5 Rad1 Nxe4 Qxe4 Bf8 Rxc6 Qb7 Rd8 Re6 Rdc8
b5 f3 Rxc6 Rxc6 Qd7 Bf2 Ra8 Rxg6 hxg6 Qxa8 Qd2 Qxa5 e4 fxe4 Qc1 Kh2 Bd6 Bg3
Bxg3 Kxg3 Qe3 Kh2 Qf4 Kg1 Qc1 Kf2 Qf4 Ke2 Qxe4 Kf2 Qf4 Kg1 Qe3 Kh2 Qe5 Kh1
Qe1 Kh2 Qe5) {0.00/33 61} Nc5 27. Rad1 (Rad1 Nxe4 Qxe4 Bf8 Rxc6 Qb8 Rd5 Bc5
Bf6 Qa8 Qa4 e4 Bd4 Bxd4 Rxd4 e3 fxe3 Rxe3 Qc4 Re8 Rxb6 Rae7 Rdd6 Re2 Rxg6
hxg6 Rxg6 Kf8 Qc5 R2e7 Rg8 Kxg8 Qg5 Kh7 Qh5 Kg7 Qg5 Kh7) {0.00/38 5} Nxe4
28. Qxe4 (Qxe4 Bf8 Rxc6 Qb8 Rd5 Bc5 Bf6 Qa8 Qa4 e4 Bd4 Bxd4 Rxd4 e3 fxe3
Rxe3 Qc4 Re8 Rxb6 Rae7 Kh2 Re2 Rg4 Qa7 Qc5 Qd7 Qc4 Qd8 Rb5 R8e3 Rf4 Qd7 Rg4
Re8 Rb6) {0.00/38 3} Bf8 29. Rxc6 (Rxc6 Qb8 Rd5 Bc5 Bf6 Qa8 Qa4 e4 Bd4 Rae7
Be3 Bxe3 fxe3 b5 Qxb5 Rb7 Qc4 Qb8 Rxa5 Rd7 Rd5 Rxd5 Qxd5 Rd8 Qxe4 Rd1 Kf2
Rd2 Kg1 Rd1) {0.00/39 20} Qb7 30. Rd8 (Rd8 Re6 Rdc8 b5 f3 Rxc6 Rxc6 Qd7 Bf2
Ra8 Rxg6 hxg6 Qxa8 Qd2 Qxa5 e4 Qxb5 e3 Bg3 Bd6 Qe8 Kg7 Be5 Bxe5 Qxe5 Kg8
Qe8 Kg7 Qe5) {0.00/38 52} Rxd8 31. Bxd8 (Bxd8 Qb8 Bxb6 Rb7 Be3 Rxb2 Ra6 Qb7
Qc4 Qb5 Qc8 Qb8 Qd7 Rb1 Kh2 e4 g3 Qb5 Qxb5 Rxb5 c4 Rb7 c5 f6 Rxa5 Kf7 g4
Ke6 Kg3 Kd5 h4 Rc7 Kf4 Rc6 Ra8 Bxc5 Ra5 h6 Rxc5 Rxc5 Bxc5 Kxc5 Kxe4 Kc4 f3)
{+0.17/33 32} b5 32. Bb6 (Bb6 Qd7 Bxa7 f5 Qxe5 Qxc6 Bd4 Kf7 Qh8 h5 Qh7 Ke8
Qg8 Qd6 Bg7 Qd1 Kh2 Qd6 g3 f4 Bxf8 fxg3 Kg2 Qxf8 Qxg6 Kd7 Kxg3 h4 Kg2 Qe7
Kf3 Qf8 Ke3 Qc5 Ke2 Qe7 Kd3 Kc7 Qf5 Kb6 Qe4 Qf7 Qxh4 Qb3 Qd8 Ka6 Qd6 Kb7
Qd7 Ka6 Qc6 Ka7 Qc7 Ka6 f4 Qxb2 Qc6 Ka7 Qd7 Kb6 Qd6 Kb7) {+1.49/33 30} b4
33. Qc4 (Qc4 bxc3 bxc3 Ra8 Rc7 Qxc7 Qxc7 a4 Qc6 Rb8 Bc7 Rc8 Qd7 Ra8 Bxe5
Ra5 Bd4 a3 Qd8 Rf5 c4 a2 c5 Rxc5 Qf6 a1=Q Bxa1 Rc1 Kh2 Rxa1 Qxa1 Bd6 g3 Bc5
Kg2 Bf8 Qe5 h6 Qf6 Bc5 Qc3 Bf8 Qe5 Kh7 Qd4) {+7.20/31 26} bxc3 34. bxc3
(bxc3 Bc5 Qxc5 Ra8 Qd5 Qb8 Rc7 Qf8 Rxf7 Qxf7 Qxa8 Kg7 Qxa5 Qe8 Qd5 h6 Bc7
Kf6 Bd8 Kg7 Qd6 Qf8 Qxe5 Kf7 Qd5 Ke8 Bb6 Qf5 Qa8 Kf7 Qb7 Ke8 Qb8 Ke7 Bd4 h5
Qb7 Qd7 Bc5 Ke6 Qe4 Kf7 Qf4 Ke6 Bd4 Kd5 Qf8 Qf5 Qg8 Kc6 c4 Kd7 Qg7 Ke6 Qb7
h4) {+7.88/31 25} a4 35. Bxa7 (Bxa7 a3 Rc7 Qb1 Kh2 Qf5 Be3 Qf6 Ra7 Kg7 Bc5
Bxc5 Qxc5 h5 Rxa3 h4 Ra4 g5 Kg1 Kg6 Qf8 e4 Ra7 e3 fxe3 Qe6 Qg8 Kf6 Qd8 Kg6
Qd3 Qf5 Qxf5 Kxf5 Rxf7 Ke6 Rb7 Kd5 Kf2 Kc5 Ke2 Kc4 Rc7 Kd5 Rf7 Ke6 Rb7 Kd5)
{+9.01/30 35} 1-0[/pgn]

[JJJ]

I scored Komodo 4/6 on the pool. So, it can happen after all