Busted French line?

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jdart
Posts: 4014
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

Re: Busted French line?

Post by jdart » Sat Oct 17, 2020 10:37 pm

I have a bunch of opening books. Hiarcs book recommends 5. Nf3. A line from that book, also found in the Chessbase French Powerbook 2018, goes:

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Ng8 5. Nf3 Ne7 6. Bd3 Nbc6 7. O-O Nb4 8. Be2
Nbc6 9. Qd3

with very good stats for White.

supersharp77
Posts: 913
Joined: Sat Jul 05, 2014 5:54 am
Location: Southwest USA

Re: Busted French line?

Post by supersharp77 » Sat Oct 17, 2020 11:59 pm

mmt wrote:
Sat Oct 17, 2020 10:23 pm
I have the results of a long analysis with Oct 5 SF dev, nn-baeb9ef2d183.nnue, 450 GB of cache, most important 7-piece EGTBs. The TCEC game that SF lost was:
[Event "TCEC Season 19 - Superfinal"]
[Site "https://tcec-chess.com"]
[Date "2020.10.01"]
[Round "5.1"]
[White "LCZero v0.26.3-rc1_T60.SV.JH.92-190"]
[Black "Stockfish 202009282242_nn-baeb9ef2d183"]
[Result "1-0"]
[BlackElo "3564"]
[ECO "C11"]
[GameDuration "04:28:25"]
[GameEndTime "2020-10-01T09:34:42.529 UTC"]
[GameStartTime "2020-10-01T05:06:17.274 UTC"]
[Opening "French"]
[PlyCount "178"]
[Termination "adjudication"]
[TerminationDetails "TCEC win rule"]
[TimeControl "7200+10"]
[Variation "Steinitz variation"]
[WhiteElo "3542"]



If 9... Nec6 is played like in the game, the evals go bad, down to -1.22 and white probably can win it.

So the conclusion is that black has several different viable moves and this French line is not busted. However, it will be a tough game for black to hold.
Well some new moves seemed to arise in this contest....Whites Move 5. A3 ! Is a nice wrinkle to eliminate the winawer possible pinning move Bb4..Black should continue Ba6 and exchange Bishops quickly... ...Blacks Move 5 c5!? is ineffective and too slow as white easily strengthens his D4 square with NF3... Nc3-e2... and c3. A critical problem with b6 (French Defense) is it somewhat weakens the queenside white squares and also b6 blocks Blacks queen critical access to the Qb6 and Qa5 dark squares..meanwhile White piles up attacking possibilities on the Kingside...Black must act quickly to Keep the balance in such closed positions... :) :wink:

mmt
Posts: 296
Joined: Sun Aug 25, 2019 6:33 am
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Re: Busted French line?

Post by mmt » Mon Oct 19, 2020 6:15 pm

jdart wrote:
Sat Oct 17, 2020 10:37 pm
I have a bunch of opening books. Hiarcs book recommends 5. Nf3. A line from that book, also found in the Chessbase French Powerbook 2018, goes:

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Ng8 5. Nf3 Ne7 6. Bd3 Nbc6 7. O-O Nb4 8. Be2
Nbc6 9. Qd3

with very good stats for White.
The latest SF dev would respond with 5... c5:

67/91 4,212,234,424k -0.90 1. ... c5 2.Be3 Nd7 3.dxc5 Nxc5 4.Nd4 Ne7 5.f4 a6 6.Qd2 Nc6 7.Qf2 Nxd4 8.Bxd4 Qc7 9.a3 Bd7 10.0-0-0 b5 11.h4 Rc8 12.g4 Qb7 13.b4 Ne4 14.Nxe4 dxe4 15.Rh3 Bc6 16.Be2 Be7 17.f5 Bd5 18.Qf4 Kd7 19.Rd2 Rhd8 20.Re3 Kc7 21.f6 gxf6 22.exf6+ Bd6 23.Be5 Qb6 24.Bxd6+ Rxd6 25.Rc3+ Kb8 26.Rxc8+ Kxc8 27.g5 Rd8 28.Kb2 Qc7 29.Qe3 Kb7 30.Rd4 Rg8 31.Bd1 Qe5 32.Bf3 h6 33.Bxe4 Bxe4 34.Qxe4+ Qxe4 35.Rxe4 hxg5 36.Rg4 Kc6 37.Kb3 Rh8 38.hxg5 Rh3+ 39.c3 Rf3 40.Rh4 Rg3 41.Rh7 Rxg5 42.Rxf7 Rf5 43.Ra7 Kb6

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