LCZero blunders in TCEC cup 4

[MikeB]

New game
5k2/3n1p1p/7P/1pqN2P1/2r1rP2/5Q2/6K1/3R1R2 b - - 0 1

Analysis by Lc0 v0.22.0:

40...b4 41.Rfe1 Rxe1 42.Rxe1 b3 43.Kh3 Rc1 44.Rxc1 Qxc1 45.Qxb3 Qf1+ 46.Kh2 Qf2+ 47.Kh3 Qf1+ 48.Kh4 Qe1+ 49.Kg4 Qe2+ 50.Kg3 Qe1+ 51.Kf3 Qf1+ 52.Kg4 Qe2+ 53.Qf3 Qxf3+ 54.Kxf3 f6 55.Kg4 fxg5 56.Kxg5 Kf7 57.Kf5 Nf8 58.Nf6 Ke7 59.Ne4 Nd7 60.Ng5 Nf6 61.Nxh7 Nxh7 62.Kg6 Nf8+ 63.Kg7
+/= (0.54) Depth: 24/58 00:02:28 3277kN


I cannot get my LCO to play that silly move.

b4 is the best move here ...and it would still be in the game , game over after Qc6...

Code: Select all

(  [Stockfish 021119 64 BMI2] 58:+0.00 1...b4 2.Rfe1 Rxe1 3.Rxe1 b3 4.Kh3 Rc1 5.Re2 Qc8 6.Kg3 Rc2 7.Re1 Rc1 8.Rxc1 Qxc1 9.Qxb3 Qe1+ 10.Kg4 Qe2+ 11.Kh3 Qf1+ 12.Kh4 Qe1+ 13.Kg4 Qe2+ 14.Kg3 Qe1+ 15.Kf3 Qf1+ 16.Kg4 Qe2+ 17.Qf3 Qxf3+ 18.Kxf3 f6 19.Kg4 fxg5 20.Kxg5 Kf7 21.Kf5 Nf8 22.Nf6 Ke7 23.Ne4 Nd7 24.Ng5 Nf6 25.Nxh7 Nxh7 )
(  [Stockfish 021119 64 BMI2] 58:+0.00 1...Rcd4 2.Rxd4 Rxd4 3.Nc3 Nb6 4.Re1 Nd5 5.Ne4 Qc2+ 6.Kg1 Ra4 7.f5 Ra2 8.Nf2 Qd2 9.Kf1 Qf4 10.Qxf4 Nxf4 11.Ng4 Nh3 12.Re5 Nxg5 13.Nf6 Ra8 14.Nd7+ Kg8 15.f6 Ne6 16.Rxb5 Nf8 17.Rg5+ Ng6 18.Rd5 Nf8 19.Nb6 Rb8 20.Rd6 Re8 21.Nd5 Ne6 22.Ne7+ Kf8 23.Nf5 Ra8 24.Kf2 Ra2+ 25.Ke3 Ra3+ 26.Ke2 Ra2+ )

I guess ...b4 isn't the only best move.

Regards,

Zenmastur

You're correct - my single thread search was too short ;>)