by PokerListings.com
The Zone System was first introduced by Dan Harrington in his highly acclaimed book Harrington on Hold’em, Volume II: The Endgame. The system divides a poker tournament into five different zones based on a player’s stack size as compared to the blinds and antes. Each zone will affect your play and correct strategy will vary dramatically as a result. The ratio of your stack compared to the blinds and antes is referred to as your “M.” For example: You have $750 in chips and the blinds are $25/$50 with no antes. This means that you have 10 times more than the starting pot and your M is 10.
The Green Zone: M is 20 or More
In the Green Zone all weapons are at your disposal and you can play in all different kinds of playing styles. This is the place to be but you must be careful to balance your play in a way that allows you to continue building your stack while simultaneously protecting it. You can afford to play in both a super conservative style as well as in a super aggressive style.
The Yellow Zone: M is 10-20
You can no longer play conservative (tight) poker. The blinds and antes are starting to hurt your stack and you must…. read rest of article at PokerListings.com