It's currently hard for Najdorf players to decide how to meet 6 Bg5 and now even 6...e6 7 f4 b5!?, the sharp Polugaevsky Variation, is back on the agenda:
A critical test of the Polugaevsky is 8 e5 dxe5 9 fxe5 Qc7 10 exf6 Qe5+ 11 Be2 Qxg5 12 0-0 Ra7 13 Qd3 Rd7 14 Ne4 Qe5 15 Nf3!:
Black opted for 15...Qc7!? 16 Qe3 Bb7 in Wang Hao-Nakamura and now 17 c4!? still looks like the critical test to me. Do expect further developments here.
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