Author: Cliff Sears
Date: 13:16:15 09/24/04
Go up one level in this thread
On September 24, 2004 at 15:51:49, Daniel Jackson wrote:
>On September 23, 2004 at 21:23:32, John Merlino wrote:
>
>>On September 23, 2004 at 21:10:07, Roy Brunjes wrote:
>>
>>>On September 23, 2004 at 20:57:15, Daniel Jackson wrote:
>>>
>>>>On September 23, 2004 at 20:16:05, Cliff Sears wrote:
>>>>
>>>>>The move played was Qxf3
>>>>>
>>>>>Analysis from "The World's Greatest Chess Games" says Rg4 is best. What does
>>>>>your engine say?
>>>>>
>>>>>[d] 1r2k1r1/pbppnp1p/1bn2P2/7q/Q7/B1PB1N2/P4PPP/3RR1K1 b - - 0 19
>>>>>
>>>>>[Event "GCG_003"]
>>>>>[Site "Berlin"]
>>>>>[Date "1852.??.??"]
>>>>>[Round "?"]
>>>>>[White "Anderssen, A."]
>>>>>[Black "Dufresne, J."]
>>>>>[Result "1-0"]
>>>>>[ECO "C52"]
>>>>>[WhiteElo "2600"]
>>>>>[BlackElo "2370"]
>>>>>[Annotator "Fritz 5.00 (5s)"]
>>>>>[PlyCount "47"]
>>>>>[EventDate "1852.??.??"]
>>>>>
>>>>>1. e4 e5 {Opening = C52 - Evans Gambit-Hauptvariante /Evans Gambit-main line}
>>>>>2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O d3 8. Qb3 Qf6 {
>>>>>Exerts pressure on the isolated pawn} 9. e5 Qg6 10. Re1 Nge7 11. Ba3 $146 (11.
>>>>>Nbd2 O-O 12. Ne4 d2 13. Bxd2 d5 14. exd6 cxd6 15. Bd3 Qe6 16. Qc2 Qd7 17. Bf4
>>>>>Bc7 18. Rad1 Ng6 19. Bg3 d5 20. Nc5 Qd8 21. Bxg6 hxg6 22. Bh4 Bxh2+ 23. Kh1 Qd6
>>>>>24. Ne4 Qa3 25. Rxd5 Bc7 26. Qd2 Be6 27. Nf6+ Kh8 28. Rxe6 fxe6 29. Rd7 Rad8
>>>>>30. Qh6+ {1-0 Losev,D-Kadimova,I/Moscow op Russian Winter 1991/TD 91\03}) 11...
>>>>>b5 $15 (11... d5 $142 $5 12. exd6 cxd6 $17) 12. Qxb5 Rb8 13. Qa4 Bb6 14. Nbd2
>>>>>Bb7 15. Ne4 Qf5 (15... Nd4 16. Nfg5 Ne6 17. Bxd3 $11) 16. Bxd3 Qh5 (16... Nxe5
>>>>>$4 17. Nd6+ cxd6 18. Bxf5 $18) 17. Nf6+ $15 (17. Rab1 $142 $5 $11) 17... gxf6
>>>>>18. exf6 Rg8 19. Rad1 $4 $19 (19. Kf1 Rxg2 20. Kxg2 $19) 19... Qxf3 {
>>>>>Do you see the mate threat?} 20. Rxe7+ Nxe7 $4 (20... Kd8 21. Rxd7+ $1 Kc8 22.
>>>>>Rd8+ Kxd8 23. Be2+ Nd4 24. Bxf3 Bxf3 $14) 21. Qxd7+ $3 Kxd7 22. Bf5+ Ke8 23.
>>>>>Bd7+ Kf8 (23... Kd8 24. fxe7#) 24. Bxe7# 1-0
>>>>
>>>>I'll analyse this further....but Rg4 will stop the slaughter....Qh3! is also far
>>>>better than Qxf3??
>>>
>>>
>>>CM9000 custom personality says ...Bd4 is best with 0.00 eval after 10 mins on
>>>1.5 GHz Athlon XP. Is that accurate? Let the debates begin!
>>>
>>>Roy
>>
>>Confirmed with CM9_SKR on an AMD 2500 -- Bd4 gets a -0.04 score in Black's
>>favor:
>>
>>Time Depth Score Positions Moves
>>0:00 1/3 -6.95 4766 19...Qxf3 20.Be4 Qxf2+ 21.Kh1 Ne5
>> 22.Bxb7 Rxb7
>>0:00 1/4 1.41 34811 19...Qxf3 20.Rxe7+ Kd8 21.Rxd7+
>> Kc8 22.Rd8+ Kxd8 23.Be2+ Nd4 24.Bxf3
>> Bxf3 25.cxd4 Bxd1 26.Qxd1
>>0:00 1/4 -0.90 35802 19...Rxg2+ 20.Kxg2 Ne5 21.Be4 Qg4+
>> 22.Kh1 Nxf3 23.fxe7 Nxe1 24.Rxe1
>> Bxf2
>>0:00 1/4 -1.53 40425 19...Ne5 20.Rxe5 Rxg2+ 21.Kf1 Rxf2+
>> 22.Ke1 Qxf3 23.Rxe7+ Kf8
>>0:00 1/5 1.09 83607 19...Ne5 20.Rxe5 Rxg2+ 21.Kf1 Rxf2+
>> 22.Ke1 Bxf3 23.Rxh5 Bxh5 24.fxe7
>> Bxd1 25.Kxd1 Rxh2
>>0:00 1/5 0.93 99920 19...Qxf3 20.Rxe7+ Kd8 21.Rxd7+
>> Kc8 22.Rd8+ Kxd8 23.Be2+ Nd4 24.Bxf3
>> Bxf3 25.Rxd4+ Bxd4 26.Qxd4+ Kc8
>>0:00 1/5 -0.40 136151 19...Rg4 20.Bc4 Qf5 21.Kf1 Rxc4
>> 22.Qxc4 Qxf6
>>0:00 1/5 -0.56 169638 19...Qh3 20.Bf1 Qf5 21.Bd3 Qxf6
>> 22.Bxh7
>>0:01 1/5 -0.59 201005 19...Rxg2+ 20.Kxg2 Ne5 21.Qxd7+
>> Nxd7 22.Rxe7+ Kd8 23.Rxd7+ Kc8
>> 24.Be2
>>0:01 1/5 -0.99 256935 19...Bd4 20.Nxd4 Rxg2+ 21.Kxg2
>> Nxd4+ 22.Re4 Bxe4+ 23.Bxe4
>>0:01 1/6 -0.32 366962 19...Bd4 20.cxd4 Qxf3 21.Be4 Rxg2+
>> 22.Kh1 Rxh2+ 23.Kxh2 Qxf2+ 24.Kh1
>>0:05 1/7 -0.17 1316881 19...Bd4 20.cxd4 Qxf3 21.Be4 Qxf6
>> 22.Rb1 Qxd4 23.Qxd4 Nxd4 24.Rxb7
>> Rxb7 25.Bxb7
>>0:07 1/7 -0.20 1574857 19...Qh3 20.Bf1 Qf5 21.Bd3 Qxf6
>> 22.Bxh7 Rh8 23.Bxe7 Nxe7 24.Rxd7
>> Rxh7 25.Rdxe7+ Kf8
>>0:16 1/8 -0.11 3770828 19...Qh3 20.Bf1 Qf5 21.Bd3 Qxf6
>> 22.Bxh7 Rh8 23.Qg4 d6
>>0:19 1/8 -0.37 4557537 19...Bd4 20.cxd4 Qxf3 21.Be4 Rxg2+
>> 22.Kh1 Rxh2+ 23.Kxh2 Qxf2+ 24.Kh1
>> Qxf6 25.Qc2
>>0:34 1/9 -0.30 8657595 19...Bd4 20.cxd4 Qxf3 21.Be4 Rxg2+
>> 22.Kh1 Rxh2+ 23.Kxh2 Qxf2+ 24.Kh1
>> Qxf6 25.Bg2 Qh4+ 26.Kg1 f5
>>1:22 1/10 -0.26 21540482 19...Bd4 20.cxd4 Qxf3 21.Be4 Rxg2+
>> 22.Kh1 Rxh2+ 23.Kxh2 Qxf2+ 24.Kh1
>> Qxf6 25.Qc2 Kf8 26.Qh2 d6
>>4:35 1/11 -0.04 74470403 19...Bd4 20.Bf1 Bxf6 21.Qf4 Qa5
>> 22.Qxf6 Qxa3 23.Bc4 Kd8 24.Bxf7
>> Rf8 25.Qg7
>>
>>jm
>
>Try 19. Qh3! and see what Chessmaster has to say....
I had Crafy, Hiarcs 7.32 and Anaconda 1.6 testing out this position. Hiarcs and
Crafy suggested Qh3. Anaconda suggested the Qxf3? move. None came up with either
Bd4 or the suggested Rg4.
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