Salut . c'est quoi une concave ? quand je regarde des streams ou autres vods j'entends les casters gueuler OH PUTAIN LA CONCAVE mais je sais pas clairement ce que c'est merci!

http://wiki.teamliquid.neet/starcraft2/Unit_Positioning

Concave[edit]
The concave unit position is the most aggressive stance. It is a curved position which allows all of your units to focus fire on a unit contained in the center point outside of the concave curve (hereafter referred to as "center point"). While being the most aggressive stance, it is also the weakest to flanking. Attempting to attack the enemy from the center point will maximize the enemy's damage. However, attacking from either side (the top or the bottom) allows you to attack each unit one at a time which vastly increases your DPS. Furthermore, attacking a concave from the behind also increases your DPS due to fighting a convex curve (see below), but the advantage is not nearly as good as attacking from one of the more vulnerable sides.

There are some units which perform very well against concave curves - the most notable one being the Colossus because its attack naturally follows a concave curve across the battlefield. As such, a Colossus maximizes its damage when fighting a concave curve and is the sole exception to fighting from within the center point.

C'est l'encerclement de l'armée ennemie

Ah merci bien