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### Strategy

The basic postflop strategy is based on the EHS. Two thresholds determine the postflop betting actions: a postflop-raise threshold and a postflop-call threshold. If Loki-1's EHS is greater than or equal to the postflop-raise threshold then it will raise when less than two bets have been made this round and call otherwise. When its EHS is greater than or equal to the postflop-call threshold (but not greater than the postflop-raise threshold), Loki-1 will bet if nobody else has done so and call otherwise, except when it is two or more bets to call and Loki-1 has not already called a bet this round. In the cases where Loki-1's EHS is less than the postflop-call threshold or its decision is to fold, the options of semi-bluffing, calling with pot odds, and calling with showdown odds are also considered.

• Semi-bluffing consists of betting if nobody has done so in the current round, and Loki-1's hand has a high enough PPOT to call both a bet and a raise. In the subsequent rounds, Loki-1 will continue to bet (even without sufficient PPOT) if no other player bets. With semi-bluffing Loki-1 pretends to have a strong hand while there is a reasonable chance of winning the pot immediately (to scare the opponents out from the game).
• Pot odds is the ratio of the amount of money in the pot to the amount required to call the current bet. By using pot odds, Loki-1 will stay in the hand if its winning chances (PPOT before the river and HS on the river) surpass the expected return from the pot. For example, assume the pot is $20 and the amount to call is$4. The pot odds are and Loki-1's winning chances are 0.25 (25%). In this situation, three times out of four that Loki-1 calls, its hand will lose at a cost of $4 each. However, it wins$20 one time out of four resulting in an average profit of \$2 per hand. A call is better than a fold when Loki-1's winning chances are greater than or equal to the pot odds.
• Showdown odds is the ratio of the amount of money expected to be in the pot by the showdown, to the amount it will cost Loki-1 to stay in the hand to actually see the showdown. Loki-1 calls when its EHS is greater than showdown odds. This strategy was introduced to discourage frequent bluffing by the opponent.

Also, Loki-1's betting strategy contains the knowledge of some advanced strategies such as check-raising. This knowledge was introduced in Loki-1 as deceptive strategies to add unpredictability to its play.

Next: Opponent modeling Up: Postflop Previous: Hand Evaluation
Lourdes Pena
1999-09-10