tony37 wrote on 07/31/13 at 20:08:50:

Vass wrote on 11/15/11 at 11:13:44:

Engines good at tactics.. Really?

an example from one of my correspondence games:

Houdini (1.5) evaluates this as completely equal giving 1.Ndf3 at depth 23

yet, black is totally lost after 1.Bxh7+! Kxh7 2.Qh5+ Kg8 3.Qxh4 Nxe5 4.fxe5 Be7 5.Rf6!! (what a wonderful move)

Very Nice Position!!. I couldnot produce everytime though as smp analysis are not always reproducible.

But New Stockfish Dev versions are good.

New game

Analysis by Stockfish 180813 64 SSE4.2:

16.Bxh7+ Kxh7 17.Qh5+ Kg8 18.Qxh4 Nxe5 19.fxe5 Be7 20.Rf6 Rxc2 21.Nf3 Re8 22.g6 fxg6 23.Ng5 Bxf6 24.Qh7+ Kf8 25.Rf1 Qc7 26.exf6 Qxh2+ 27.Qxh2 Rxh2 28.Kxh2 Ba6 29.fxg7+ Kg8 30.Rf6 Re7 31.Nxe6 Rf7 32.Rxf7 Kxf7 33.Kg3 Bc8 34.Nc7 Kxg7 35.Kf4 Bf5 36.Nxd5 Kf7 37.Ke5

+- (3.55) Depth: 28/55 00:02:38 296mN

(Prakash, Bhubaneswar 20.08.2013)

I tried again with another of my parameters. I found it again.

New game

Analysis by Stockfish 180813 64 SSE4.2:

16.Bxh7+ Kxh7 17.Qh5+ Kg8 18.Qxh4 Nxe5 19.fxe5 Be7 20.Rf6 Rxc2 21.Raf1 Rxd2 22.g6 fxg6 23.Rxf8+ Qxf8 24.Rxf8+ Bxf8 25.Bc3 Rc2 26.Bb4 Bxb4 27.axb4 Kf7 28.Qf4+ Ke7 29.Qg4 Kf7 30.Qf3+ Ke8 31.Qd3 Rc1+ 32.Kf2 Kf7 33.Qf3+ Ke8

+/- (1.43 ++) Depth: 30/68 00:04:40 597mN

(Prakash, Bhubaneswar 20.08.2013)

I found My favorite engine Spark finds it fastest. only 0.17 secs.

New game

2rq1rk1/pb1n1ppp/1p1bp3/3pN1P1/3P1P1n/PP1B4/1BPNQ2P/R4RK1 w - - 0 1

Analysis by Spark-1.0-win64-mp-corei:

16.Bxh7+ Kxh7 17.Qh5+ Kg8 18.Qxh4 Rxc2 19.Rf3 f5 20.Nxd7 Qxd7 21.g6 Re8 22.Rh3 Kf8 23.Bc3 Ba6 24.Re1 e5 25.fxe5 Qe6 26.Rg3 Bxa3

+- (1.83 --) Depth: 18/39 00:00:17 99053kN

(Prakash, Bhubaneswar 20.08.2013)

Note none is running on default parameters and only on a laptop consisting slow intel 3 cores. May be on Big hardwares it will be faster.