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Subject: Re: WCCC (4) ParSOS vs Hossa (1-0) PGN -- Mate in 14 position!

Author: John Merlino

Date: 11:15:27 11/24/03

Go up one level in this thread


On November 24, 2003 at 13:38:33, Steffen Jakob wrote:

>On November 24, 2003 at 13:14:30, Kurt Utzinger wrote:
>
>>[Event "WCCC 11th"]
>>[Site "Graz"]
>>[Date "2003.11.24"]
>>[Round "4"]
>>[White "ParSOS"]
>>[Black "Hossa"]
>>[Result "1-0"]
>>[ECO "A29"]
>>[PlyCount "75"]
>>
>>1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. Nc3 Be7 8.
>>d3 O-O 9. Be3 Be6 10. Rc1 Nd5 11. d4 exd4 12. Bxd4 Nxc3 13. Bxc3 Bxa2 14. Qa4
>>Be6 15. Rfd1 Qc8 16. Nd2 Rd8 17. Nc4 Bd7 18. Ne3 Bg5 19. f4 Be7 20. Kh1 Bc5 21.
>>Nd5 Bd6 22. Qc2 Bf5 23. e4 Bg4 24. Rd2 Be6 25. e5 Bc5 26. Be4 Bxd5 27. Rxd5
>>Rxd5 28. Bxd5 Qd7 29. Rd1 Rd8 30. Qe4 Kh8 31. f5 Qe7 32. Rf1 Nb4 33. f6 gxf6
>>34. Bb3 c6 35. Rf5 Nd5 36. Rh5 f5 37. Qxf5 f6 38. exf6 1-0
>
>Hi!
>
>It would be interesting to read opinions if white had enough compensation for
>giving the pawn in move 13. Also I am not sure what the decesive mistake of
>Hossa was (surely 22... Bf5 was a waste of time).
>
>Greetings,
>Steffen.

Chessmaster 9000 (CM_SKR personality) seems to think that White is marginally
ahead after 13...Bxa2 (+0.17).

The engine thinks that 17...Bd7 was not as good as 17...Rxd1 18.Rxd1 Qe8, with a
difference of about a half-pawn.

The engine PREFERS 22...Bf5, with a score of -0.04 (this is on a P4-2.4):

Time	Depth	Score	Positions	Moves
0:00	1/3	0.14	1690		22...Re8 23.Bxg7 Kxg7 24.Qc3+ Ne5
					25.fxe5 Bxe5
0:00	1/3	-0.18	2089		22...Bh3 23.Be4 Qe6 24.b4
0:00	1/3	-0.23	2289		22...Bf5 23.e4 Bg4
0:00	1/3	-0.27	3246		22...Bg4 23.Ne3 Be6 24.Nd5
0:00	1/4	-0.28	5734		22...Bg4 23.Bxg7 Kxg7 24.Qc3+ Kg8
					25.Nf6+ Kf8 26.Nxh7+ Kg8
0:00	1/4	-0.54	6832		22...Bf5 23.e4 Bg4 24.Rd3 a5
0:00	1/5	-0.35	16065		22...Bf5 23.e4 Bg4 24.Rd3 a5 25.Be1
0:00	1/6	-0.35	55278		22...Bf5 23.e4 Bg4 24.Rd3 a5 25.Be1
0:00	1/7	-0.36	165532		22...Bf5 23.Qb3 a6 24.Bxg7 Kxg7
					25.Qc3+ Kg8 26.Nf6+ Kf8 27.Bxc6
					bxc6 28.Qxc6
0:01	1/8	-0.39	369218		22...Bf5 23.e4 Bg4 24.Rd3 a5 25.Be5
					Bxe5 26.fxe5 Re8
0:03	1/9	-0.21	914137		22...Bf5 23.e4 Bg4 24.Rd3 Ne7 25.Ne3
					Bh3 26.Bf3 c5 27.f5
0:15	1/10	-0.28	3637456		22...Bf5 23.e4 Bg4 24.Rd3 Be6 25.Rdd1
					a5 26.f5 Bxd5 27.Rxd5
0:33	1/11	-0.18	7681638		22...Bf5 23.e4 Bg4 24.Rd2 Bh3 25.Bxg7
					Bxg2+ 26.Kxg2 Kxg7 27.Qc3+ Kg8
					28.Nf6+ Kf8 29.Nxh7+ Kg8
1:32	1/12	-0.04	24021139	22...Bf5 23.e4 Bg4 24.Rd2 Ne7 25.e5
					Nxd5 26.Rxd5 Be7 27.Rxd8+ Bxd8
					28.Bb4 c6 29.Bd6

The engine slightly prefers 24...Ne7 to Be6, because of 25.f5!, which the engine
gives a score of +0.58. But ParSOS played 25.e5 instead....

But 32...Nb4 looks like the losing move. The engine gives 32...Bb4 a score of
+0.02. But after 32...Nb4, the score is +2.00 and climbing....

Finally, after 35...Nd5, the engine announces Mate in 14 after 19 seconds!

[D]3r3k/pp2qp1p/2p2p2/2bnPR2/4Q3/1BB3P1/1P5P/7K w - - 0 36

Time	Depth	Score	Positions	Moves
0:00	1/3	0.48	1446		36.Rh5 f5 37.Qxf5 f6 38.exf6
0:00	1/4	0.97	3772		36.Rh5 f5 37.Qxf5 f6 38.exf6 Qf7
					39.Rg5
0:00	1/5	0.84	9696		36.Rh5 f5 37.Qxf5 f6 38.exf6 Qf7
					39.Rg5 Be3
0:00	1/6	1.24	23529		36.Rh5 f5 37.Qxf5 f6 38.exf6 Qf7
					39.Rg5 Rg8 40.Rg7 Rxg7 41.fxg7+ Kg8
0:00	1/7	7.87	179064		36.Rh5 f5 37.Qxf5 f6 38.Bc2 Kg8
					39.Rxh7 Qg7 40.Rxg7+ Kxg7 41.Qh7+
					Kf8 42.exf6
0:00	1/8	8.15	243629		36.Rh5 f5 37.Qxf5 f6 38.Bc2 Kg8
					39.Rxh7 Rd7 40.Qg4+ Qg7 41.Qxd7
0:01	1/9	8.39	413993		36.Rh5 f5 37.Qxf5 f6 38.Bc2 Kg8
					39.Rxh7 Rd7 40.Qxd7 Qxd7 41.Rxd7
					Nxc3 42.bxc3 fxe5 43.Rxb7
0:03	1/10	15.63	944506		36.Rh5 f5 37.Qxf5 f6 38.exf6 Qf7
					39.Bc2 Kg8 40.Qg5+ Kf8 41.Rxh7
					Qxh7 42.Bxh7 Nxf6 43.Qxf6+ Ke8
					44.Bg6+ Kd7 45.Bf5+ Kc7 46.Be5+
					Rd6 47.Qe7+ Kb6 48.Bxd6 Bxd6 49.Qxd6
0:05	1/11	16.04	2042262		36.Rh5 f5 37.Qxf5 f6 38.exf6 Qf7
					39.Bc2 Kg8 40.Rxh7 Nxf6 41.Qg5+
					Kf8 42.Rxf7+ Ke8 43.Bxf6 Rd1+ 44.Bxd1
					Kxf7
0:19	1/12	Mate14	7978002		36.Rh5 f5 37.Qxf5 f6 38.Bc2 Kg8
					39.Rxh7 Nf4 40.Qg4+ Kf8 41.Rh8+
					Kf7 42.Bb3+ Qe6 43.Rh7+ Ke8 44.Bxe6
					Rd1+ 45.Qxd1 Bd4 46.Qg4 Bc5 47.Qg8+
					Bf8 48.Qf7+ Kd8 49.Qxf8#
0:37	2/13	Mate14	15789263	36.Rh5 f5 37.Qxf5 f6 38.Bc2 Kg8
					39.Rxh7 Nf4 40.Rxe7 Bxe7 41.exf6
					Rd1+ 42.Bxd1 Kf8 43.Qd7 Kf7 44.Qxe7+
					Kg6 45.Qg7+ Kf5 46.Bc2+ Nd3 47.Bxd3+
					Ke6 48.Qe7+ Kd5 49.Qe5#

jm



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