411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...f5/4. Nc3/4...fxe4/5. Nxe4/5...d5/6. Nxe5/6...dxe4/7. Nxc6/7...Qd5/8. c4/8...Qd6/9. Nxa7/9...Bd7/10. Bxd7/10...Qxd7/11. Qh5
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tright Ruy Lopez, Schliemann Defence rd kd bd nd rd nl pd pd qd pd pd ql pl pd pl pl pl pl pl pl rl bl kl rl Common moves: 11...g6 - only moveAll of Black's moves in this position look terrible! 11...Qf7?? runs into 12.Qb5+. Moving the king out to e7 also loses at least a pawn to 12.Qe5+. The computer recommends 11...Kd8 as the least bad option, although White could then swing the queen over to a5 threatening Nc6+ and so forcing the king straight back to e8, while potentially saving a tempo by not having to move the knight immediately.
So the modern, active way of defending this position as Black is with 11...g6!? It doesn't sacrifice a whole rook, "only" an exchange, because White hasn't got time to capture on h8 and also save the knight.