Vietnamese Letter Mahjong

Inspired of mahjong, an ancient game in China and spreads out whole the world, we build a new game that helps people to learn and play with Vietnamese letters in the alphabet and some simple but common words in Vietnamese.This game is suitable to anyone, at any ages. But it is especially suitable to kids or people who begin learning Vietnamese.To win the game, player should try to remove all pieces from the board. To do that, player should choose each pair of pieces that are in a same group and both of them are in free status. A piece is free if it is not overlaid by an another one on the higher layer and, moreover, at least one direction forward or backward of it is not blocked by a piece on the same layer.