(1) Stein - Chistiakov [B90]
Leningrad, 1960



1.e4 c5 2.Nf3 Nf6 3.Nc3 d6 4.d4 cxd4 5.Nxd4 a6 6.Bc4
A frequent reply to the Najdorf, though less played today.

6...Qc7?!
...e6 is more prudent, to shut down the a2-g8 diagonal

7.Bb3 e6 8.f4 Be7?
[8...Nc6 ]

9.g4! Nc6 10.g5 Nd7
Diagram

11.Bxe6
For the bishop, white gets three pawns and the central outpost on d5

11...fxe6 12.Nxe6 Qa5 13.Nxg7+ Kf8
[13...Kd8 14.Ne6+ Ke8 15.Qh5# ]

14.Ne6+ Kg8
[14...Ke8 15.Qh5# ]

15.Qh5 Nf8 16.Nxf8 Bxf8 17.Bd2
idea Nd5

17...Be6
[17...Qc5 18.0-0-0+/- ]

18.Nd5+- Bxd5 19.Bxa5 Bf7 20.Qg4 Nxa5 21.0-0-0 1-0