Dunsany’s chess, also known as Dunsany’s game, is an asymmetric chess variant in which one side has standard chess pieces, and the other side has 32 pawns. Unlike many chess variants, this one does not feature any fairy pieces, which are pieces not found in conventional chess. This game was invented by Lord Dunsany in 1942. A similar game is called ‘horde chess’.
There exists an almost identical game called Horde chess. In difference to Dunsany’s chess, the colors of pieces are exchanged, and the middle two columns of pawns are shifted forward one space.
Horde chess on Wikipedia.