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In no-limit or pot-limit poker, a player's M-ratio (also called "M number", "M factor"〔PokerGreed.com: Understand what hands to play in a tournament (). Accessed 2008-03-25〕 or just "M") is a measure of the health of his chip stack as a function of the cost to play each round. In simple terms, a player can sit passively in the game, making only compulsory bets, for ''M'' laps of the dealer button before running out of chips. A high ''M'' means the player can afford to wait a high number of rounds before making a move. The concept applies primarily in tournament poker; in a cash game, a player can in principle manipulate his M at will, simply by purchasing more chips. A player with a low ''M'' must act soon or be weakened by the inability to force other players to fold with aggressive raises. The term was named after Paul Magriel. ==Calculation== The M-ratio is calculated by the formula: : For example, a player in an eight-player game with blinds of $50/$100, an ante of $10, and a stack of $2,300 has an M-ratio of 10: : That is, if the player only makes the compulsory bets, he will be "blinded out" of the game in 10 rounds, or 80 hands. Dan Harrington studied the concept in great detail in ''Harrington on Holdem: Volume II The Endgame'', 〔(Harrington on Holdem: The Endgame - Poker Book Reviews )〕 defining several "zones" in which the M-ratio may fall:〔(Tournament No-Limit Hold'em: Harrington's Zone System - Poker Strategy - PokerListings.com )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「M-ratio」の詳細全文を読む スポンサード リンク
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