Power Attack: If I am using a two-handed weapon with one hand (such as a lance while mounted), do still I get the +50% damage for using a two-handed weapon?
Yes.
Weapons, Two-Handed in One Hand: When a feat or other special ability says to treat a weapon that is normally wielded in two hands as a one handed weapon, does it get treated as one or two handed weapon for the purposes of how to apply the Strength modifier or the Power Attack feat?
If you're wielding it in one hand (even if it is normally a two-handed weapon), treat it as a one-handed weapon for the purpose of how much Strength to apply, the Power Attack damage bonus, and so on.
Benefit: You can choose to take a –1 penalty on all melee attack rolls and combat maneuver checks to gain a +2 bonus on all melee damage rolls. This bonus to damage is increased by half (+50%) if you are making an attack with a two-handed weapon, a one handed weapon using two hands, or a primary natural weapon that adds 1-1/2 times your Strength modifier on damage rolls. This bonus to damage is halved (–50%) if you are making an attack with an off-hand weapon or secondary natural weapon. When your base attack bonus reaches +4, and every 4 points thereafter, the penalty increases by –1 and the bonus to damage increases by +2. You must choose to use this feat before making an attack roll, and its effects last until your next turn. The bonus damage does not apply to touch attacks or effects that do not deal hit point damage.
至少一倍力调猛力偷不了一换3我是没看出来，FAQ猛力也属于自由心证
