The Swim Flip Of A Pawn

The Swim Flip Of A Pawn - Bia/BiaGai

Unlike the Pawn in Western Chess, the Bia in Thai Chess has no power to advance two spaces on its first move. Bia swim forward one space at a time, but attack the opposing piece one space forward diagonally.

Pawns are the only pieces that can be promoted upon reaching the sixth rank (i.e. the opponent's third rank),  Without limit of number, the Pawns becomes Promoted Pawns (BiaGai) and have the same power of move as the Queen (Met): one space in any direction.