Computer Chess Club Archives




Subject: Re: a few notes from Arasan's games in CCT7

Author: John Merlino

Date: 11:20:20 02/14/05

Go up one level in this thread

>[Event "?"]
>[Site ""]
>[Date "2005.02.13"]
>[Round "?"]
>[White "witchess"]
>[Black "Arasan 9.0"]
>[Result "1-0"]
>[ECO "C28"]
>[WhiteElo "2397"]
>[BlackElo "2594"]
>[TimeControl "3000+3"]
>1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. Nf3 Nxe4 5. Nxe4 d5 6. Bd3 dxe4
>7. Bxe4 Ne7 8. c3 f5 9. Bc2 e4 10. Ne5 Qd5 11. f4 exf3 12. Nxf3 Qe6+
>13. Kf2 Qb6+ 14. d4 Be6 15. Ba4+ c6 16. Re1 Bd5 17. Bb3 O-O-O 18. Bg5
>Qc7 19. Bxd5 cxd5 20. Qe2 Qb6 21. c4 Rd7 22. cxd5 Kb8 23. Qe5+ Ka8
>24. d6 Rxd6 25. Bxe7 Bxe7 26. Qxe7 Rc8 27. Kg1 Rg8 28. Rac1 Rdd8
> 1-0 {ArasanX resigns}
>I analyzed this overnight with Crafty but didn't find where Arasan
>went wrong. I didn't like 7.. Ne7 and 7.. Bd6 seems to be better -
>this has occurred in a few games with this line. After Ne7, Arasan
>had its Bishop locked in and failed to develop it.

I have 20 games that reach the position before 7...Ne7, and all but one of them
DO play 7...Bd6. However, White tends to do very well even after that move (+10
=4 -5). (The other move played was 7...Bg4, by a low-ranked GM who beat a
low-ranked IM).

The most notable of these losses by Black with 7...Bd6 is Tartakower-Bogoljubow

[Site "Bad Pistyan CZE"]
[Date "1922.04.??"]
[Round "13"]
[White "Tartakower, Saviely G"]
[Black "Bogoljubow, Efim D"]
[Result "1-0"]
[ECO "C55"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Nc3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 Bd6
8.d4 exd4 9.Bxc6+ bxc6 10.Qxd4 O-O 11.O-O c5 12.Qc3 Bb7 13.b3 Qd7 14.Bb2
f6 15.Rad1 Qf5 16.Qc4+ Kh8 17.Nh4 Qh5 18.h3 Rae8 19.Rde1 Bd5 20.Qg4 Qxg4
21.hxg4 Re4 22.f3 Rxe1 23.Rxe1 Bg3 24.Rd1 Bxh4 25.Rxd5 Bg3 26.Ba3 Re8
27.Rd1 c4 28.Kf1 h5 29.gxh5 Re5 30.h6 gxh6 31.Bb2 Re6 32.bxc4 Kg7 33.c5
Ra6 34.a3 h5 35.Rd4 Kf7 36.Ke2 Ke6 37.Kd3 Be5 38.Re4 Kf5 39.Bc1 Ra5
40.Rh4 Rxc5 41.Rxh5+ Kg6 42.Rh6+ Kg7 43.c4 Rc6 44.Rh4 a5 45.Be3 Bd6
46.a4 Bb4 47.Rd4 Kf7 48.Rd5 Ke6 49.g4 Ra6 50.Bd4 c6 51.Rf5 Be7 52.Ke4
Ra8 53.Rh5 Rb8 54.Rxa5 Rb4 55.c5 Rb1 56.f4 Re1+ 57.Be3 f5+ 58.gxf5+ Kd7
59.Kd3 Rd1+ 60.Bd2 Kc8 61.Ra8+ Kb7 62.Rg8 Bxc5 63.f6 Bb4 64.Rg2 Bxd2
65.Rxd2 Rh1 66.f7 Rh8 67.Ke4 c5 68.Kd5 1-0

>I was a bit surprised by 13. Kf2, keeping the Queens on -
>Arasan expected Qd2 and a Queen exchange.

CM9_R1 on an AMD 2500 also likes Kf2, with a good score for White:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.66	486		13.Kf2 Bd7 14.d4 O-O-O
0:00	1/3	-0.48	904		13.Qe2 Qxe2+ 14.Kxe2 Bd7 15.d4
0:00	1/4	0.08	2441		13.Qe2 Bd7 14.Ne5 O-O-O 15.O-O
0:00	1/5	-0.04	9322		13.Qe2 Qxe2+ 14.Kxe2 Bd7 15.d3
					Nd5 16.Bg5 Bd6
0:00	1/6	0.14	35163		13.Qe2 Bd7 14.d3 O-O-O 15.Be3 Nd5
0:00	1/6	0.21	50588		13.Kf2 Bd7 14.Re1 Qa6 15.d3 O-O-O
0:00	1/7	0.15	100792		13.Kf2 Bd7 14.d4 O-O-O 15.Re1 Qa6
					16.Kg1 Kb8
0:01	1/8	0.41	310979		13.Kf2 Qa6 14.d4 Be6 15.Ba4+ Kd8
					16.Ne5 Kc8 17.Kg1 Rb8
0:04	1/9	0.49	999881		13.Kf2 Qa6 14.d4 Bd7 15.Re1 h6
					16.Bd3 Qf6 17.Kg1 O-O-O
0:11	1/10	0.68	2919960		13.Kf2 Bd7 14.d4 O-O-O 15.Re1 Qd6
					16.Kg1 Kb8 17.Bg5 h6
0:29	1/11	0.65	7336557		13.Kf2 Bd7 14.d4 O-O-O 15.Re1 Qd6
					16.Ne5 Ng6 17.Nxd7 Qxd7 18.Kg1 Be7
1:20	1/12	0.81	20586486	13.Kf2 Bd7 14.d4 O-O-O 15.Re1 Qd6
					16.Ne5 Be6 17.Kg1 c5 18.Be3 cxd4

After 13.Qe2 Qxe2+ 14.Kxe2, The King says:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.23	698		14...Bd7 15.d3 Nd5 16.Bd2
0:00	1/4	0.01	1918		14...Bd7 15.d3 Nd5 16.Bg5 Bd6
0:00	1/5	0.13	6974		14...Bd7 15.d3 O-O-O 16.Be3 Nd5
0:00	1/6	0.18	17951		14...Bd7 15.d3 O-O-O 16.Bb3 Bb5
					17.Be6+ Kb8 18.Ne5
0:00	1/7	0.30	68041		14...Bd7 15.d3 Ng6 16.Be3 Bd6 17.g3
					O-O 18.Bb3+ Kh8
0:01	1/8	0.40	276901		14...Bd7 15.Ne5 Be6 16.Ba4+ c6
					17.d4 Bd5 18.Kf2 O-O-O 19.Be3
0:02	1/8	0.32	502280		14...Ng6 15.Re1 Bd7 16.Kf1+ Be7
					17.d4 O-O-O 18.c4 Bb4
0:03	1/9	0.43	824715		14...Ng6 15.Re1 Bd7 16.Kf1+ Be7
					17.Ne5 Nxe5 18.Rxe5 Rf8 19.d3 Kd8
0:03	1/9	0.29	948879		14...Bd7 15.Ne5 Be6 16.d3 Ng6 17.Ba4+
					c6 18.Nxg6 hxg6 19.Be3 Bd6 20.h4
0:06	1/10	0.30	1477555		14...Bd7 15.Ne5 Be6 16.d4 Ng6 17.Rd1
					Bd6 18.d5 Nxe5 19.dxe6 O-O
0:07	1/10	0.27	1784260		14...Ng6 15.Re1 Bd7 16.Kf1+ Be7
					17.Ne5 Nxe5 18.Rxe5 Kd8 19.d4 Bf6
0:14	1/11	0.39	3687110		14...Ng6 15.Re1 Bd7 16.Kf1+ Be7
					17.Ng5 Rd8 18.Ne6 Bxe6 19.Rxe6
					O-O 20.d4 Rd6 21.Rxd6 Bxd6
0:46	1/12	0.30	11806371	14...Ng6 15.Re1 Bd7 16.Kf1+ Be7
					17.Ng5 c5 18.d3 Rd8 19.Be3 h6 20.Nf3
					O-O 21.Bb3+ Kh7

...over a half-pawn difference.

Also, I think 13...Qb6+ is wrong. The King much prefers developing with 13...Bd7
and an eventual queenside castle.

After that, I would say that Arasan didn't make any big mistakes, but Witchess
already had enough advantage and played it through very well.


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