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The Bill Chen Formula (from Hold'em Excellence) The formula below was developed by Bill Chen, winner of 2 WSOP bracelets (http://www.billchenpoker.com). He basically developed a mathematical formula to determine if a hand is playable based on giving the cards certain values. For the most part, the formula works extremely well and we actually use it in our Starting Hand Quiz. Determine your highest card and score as follows: (only use your lower card for gap and suited analysis)
AA = 20 points 98s = 7.5 points K9s = 6 points The information below is not strictly from the Chen formula as he believed the system only told you what to play, not when to come in for a raise. There are too many factors in determining when to raise, call or fold. The scores below can be used as a general rule of thumb. Early Position
For more information on Bill Chen visit his site at http://www.billchenpoker.com Also read his excellent book The Mathmatics of Poker 
