Combat Intuition( Complete Adventurer, p. 106)
[Fighter Bonus Feat, General]
Your keen understanding of your opponent's moves and your instinctive feel for the flow of combat enable you to shrewdly assess your opponent's combat capabilities.
Sense Motive 4 ranks, base attack bonus +5,
As a free action, you can use Sense Motive to assess the challenge presented by a single opponent in relationship to your own level/Hit Dice (see the assess opponent option under the Sense Motive skill, page 102). You gain a +4 bonus on such checks and narrow the result to a single category. In addition, whenever you make a melee attack against a creature that you made a melee attack against during the previous round, you gain a +1 insight bonus on your melee attack rolls against that creature.
A fighter may select Combat Intuition as one of his fighter bonus feats.