Ferz

abcdefgh
8
c5 black pawn
e5 white circle
d4 white upside-down bishop
c3 white circle
e3 white circle
8
77
66
55
44
33
22
11
abcdefgh
The ferz on d4, represented by an inverted bishop, may move to c3, e3, or e5, or capture the pawn on c5.

The ferz or fers is a fairy chess piece that may move one square diagonally.[1] It was used in orthodox chess and in Shatranj form of chess before being replaced by the queen.