Desperado (chess) Desperado (chess) In chess, a desperado piece is a piece that is or trapped, but captures an enemy piece before it is itself captured. This can be in either a situation where both sides have pieces, "...in which you use your doomed piece to eat as much material as possible before it dies"; or alternatively a sacrifice that will result in stalemate if it is captured. A simple example illustrating the first definition comes from a 1958 game between future World Champions Tigran Petrosian and Bobby Fischer (see diagram). White had just captured the e5-pawn with his knight on f3.
Evolution of the horse horse", "Orohippus" was not a true horse and did not live in the mountains. It resembled "Eohippus" in size, but had a slimmer body, an elongated head, slimmer forelimbs, and longer hind legs, all of which are characteristics of a good jumper. Although "Orohippus" was still pad-footed, the vestigial outer toes of "Eohippus" were not present in "Orohippus"; there were four toes on each fore leg, and three on each hind leg. The most dramatic change between "Eohippus" and "Orohippus" was in the teeth: the first of the premolar teeth were dwarfed, the last premolar shifted in shape and function