In a chess game, Wyvill formation refers to a pawn formation in which White has no b pawn, a pawn at c3 and c4, and the d-pawn at d4 or d5 (Some authorities require a Black pawn to be at c5). White's c4 pawn is a weakness because it cannot be supported by other pawns.
This was a generous offer, and Anderssen made the trip.
At that tournament, Anderssen defeated Lionel Kieseritzky, József Szén, Staunton, and MarmadukeWyvill, winning the tournament to everyone's surprise.
Anderssen was celebrated as well for two of his casual chess games in which he was victorious through combinations involving heavy sacrifice of the pieces.