411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Nxe4/6. d4/6...exd4/7. Re1/7...d5/8. Nxd4/8...Bd6/9. Nxc6/9...Bxh2/10. Kh1/10...Qh4/11. Rxe4/11...dxe4
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Ruy Lopez:Riga Variation rd bd kd rd pd pd pd pd pd pd nl bl pd qd pl pl pl pl pl bd rl nl bl ql kl
Ruy Lopez, Riga Variation, Main Line
Black takes the rook with the pawn, correctly. Now white's next move is forced: 12. Qd8+. This is the only move white has that will divert the black queen from the attack. Note that 12...Qxd8 is literally black's only legal move. White follows up thereafter with 13. Nxd8.
References
Ruy Lopez