The Checkmate dress is a chess-inspired costume of Alice that appears as DLC. The red and white coloring suggests that since her last adventure into Wonderland, she has mutual support for either side of the board rather than just white, which was the side that the Cheshire Cat originally advised her to join.
This strap-less dress has a white skirt resembling the lower half of a chess piece, and a red bodice based on a rook. Her stockings are red-and-white striped, and her knee-high boots are made from a shiny red material and resemble pawns.
She wears red and white shoulder guards based on knight pieces, and vambraces based on bishops. Her pinafore is checkered and her Omega pendant is white. The pendant is tied to a red-and-white striped choker. The dress changes Alice's irises to teal.
The only chess piece not to appear on the outfit is the Queen, however it could be that Alice herself represents the Queen; in Through the Looking Glass, and What Alice Found There, when Alice reaches the end of Looking Glass Land, and in turn the chess board, she turns from pawn to queen, just as in the rules of chess.