They added in counterattack mechanism in the 0.650version
The email says there are gonna be two ways to counterattack
For now you cant do the parry and counterattack yet ,since the new animations are not available (I used openBRF and saw 6 new counterattack animations there)It is now possible to stop attacks by parrying or blocking. Quickly pressing and releasing the right mouse button will trigger a parry, whereas holding it down will activate a block. Parrying at the right time will cause the attacker to be stunned longer giving the defender a longer window for a counter-attack. Parrying with a shield will also cause less damage to the shield. Currently, there is no seperate animation for parrying but it is still functional.
And the other way is chamber block
That means when sb attacks you , you attack him from certain direction as wellChambering animation will also defend against a particular attack direction for a brief period.Chamber right -> Defends against opponent's left to right attack.
Chamber left -> Defends against opponent's right to left attack.Chamber overswing -> Defends against opponent's thrust attack.
Chamber thrust -> Defends against opponent's overswing attack.
As long as the timing is right
your chamber animation will block his attack and at same time u follow your attack through