[Skills help] riposte

Automatic

Riposte essentially allows a swashbuckler an extra attack by making a
return strike following a successful parry.  Ripostes can only be performed
using finesse weapons.  Weapons which are unparryable can never be riposted, 
even if the wielder is proficient in the enhanced parry skill.

See also: parry 'enhanced parry' finesse