411 REFERENCE · Wikibooks
Custom Chess Theory/1.e4/1...e5/2.Ba6/2...bxa6
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2. bxa6 — Blunder Gambit 2nd Accepted
bxa6 accepts the blunder, with Black's b-pawn capturing the bishop on a6 but causes doubled pawns.
The Blunder Gambit 2nd Accepted is Black accepting the blunder using the b-pawn instead of the knight.
See also Blunder Gambit Accepted.