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...Be7/6. Re1/6...b5/7. Bb3/7...O-O/8. c3/8...d5
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tright Marshall Gambit rd bd qd rd kd pd bd pd pd pd pd nd nd pd pd pd pl bl pl nl pl pl pl pl pl pl rl nl bl ql rl kl Common moves: 9. exd5 - Marshall Gambit Accepted
Ruy Lopez, Marshall Gambit
Black is attacking e4 twice and in general threatening to overrun the centre of the board. White has no better option than to accept the proffered pawn with
9. exd5
followed by capturing twice on e5. Skip ahead to the end of that forcing variation if you like: 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5.
However, White can also decline the gambit with 9.d4.
Marshall Attack