If you can play World Chess then I am sure you can play Thai Chess too. It is nearly the same with only a few differences. When it takes another piece it does this diagonally. After moving forward three rows, a pawn is promoted to a queen. It doesn't have to reach the far end.
Promotion is done by turning the piece over.
The board is the same but the squares are not checkered. The set-up is nearly the same but the white king and the black queen are facing each other. The pawns are on the third and sixth row . When no-one has a pawn left and one player only has a king left, then you must checkmate in a certain number of goes depending on what is left on the board. If you cannot checkmate then it is a draw.