394
I have developed a rough method for a preliminary evaluation of rook endings. For each favourable element, such as an extra pawn, spatial advantage, the more-active rook, or an important weakness in the enemy's camp, one point is awarded. If the difference between the two sides is one point the position is clearly better but not necessarily winning. With the exception of some extreme cases a score of 2-0 or 3-1 should guarantee a win. Mihail Marin, Learn From The Legends