Portuguese Gambit, Melbourne Shuffle Variation

The Melbourne Shuffle Variation arises when White, after 4. f3 Bf5 5. Bb5+ Nbd7, prefers 6. Nc3 to the 6. c4 of the Jadoul Variation. The knight guards the extra pawn on d5 and speeds development, but the c-pawn stays at home and the bishop on b5 remains a target. Black almost always answers 6...a6, challenging the bishop at once. White keeps the pawn, engines give White a slight edge, and the line is seldom played.