Mahjong, which originated in China, is similar to the western card game, rummy, and players in Japan said the tile game required skill, strategy, calculation and a degree of chance.

麻将起源于中国，与西方的拉米纸牌游戏相似，日本玩家表示这种出牌比赛需要技巧、策略、计算以及一定程度的运气。

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What's more, he says, seasoned Scrabble players know there is an important difference between the value written on a Scrabble tile and that tile's real value when played in a game, a notion he calls "equity value".

BBC: Scrabble: Should letter values change?