In chess we have certain aims - coordination and the activation of one'sown pieces. Sometimes we need a special little something to speed upone of these processes - a small material sacrifice, mainly a pawn orpawns. A dynamic pawn sacrifice is easy to see, as the idea is to get cleargains for the pawn. Positional pawn sacrifices are much more difficult, astheir real purpose does not become clear immediately, but only duringthe development of the plan. There were famous masters of positionalpawn sacrifices - Bronstein, Kasparov and Romanishin.