The silver 銀将 moves one square forwards, or one square in any of the four diagonal directions. It cannot move sideways or straight back.
Silvers are attackers as much as defenders: the backward diagonals let a silver retreat after pushing forward, which a gold cannot do so easily.
Gold or silver?
The two generals look alike but cover different squares. A gold covers the squares beside it; a silver covers the diagonals behind it. Compare them side by side:
Try it
Try it: Move the silver everywhere it can go — including capturing Gote's pawn.