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
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tright Closed Ruy Lopez rd bd qd rd kd pd pd bd pd pd pd pd nd nd pd pd pl bl pl nl pl pl pl pl pl pl rl nl bl ql rl kl Common moves: 8...d5 - Marshall Gambit 8...d6 - transposition to Closed Main Line
Closed Main Line, (to) Marshall Gambit
Black can now pull the trigger on the Marshall Gambit, sacrificing a pawn to quickly activate all her pieces while stripping the White kingside of defenders, with
8...d5
Alternatively,
8...d6
transposes back to the Closed Main Line (7...d6 8.c3 O-O). This move is actually more common than the Marshall Gambit, although it's the Marshall Gambit which makes 7...O-O into a significant alternative to 7...d6.
Marshall Attack