You need to list the rules here I'm pretty sure, and also there are a whole bunch of pieces which are not in the variants pieces list here. You'll need to change it up.
GIgachess 2
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Standard pieces include: king, queen, horse, chariot, bishop Chess pieces available in variations include: chancellor, archbishop ,general ,camel
Admiral It combines the movements of the chariot and the king 
Missionary it combines the movements of bishop and king 
Eagle
move a square diagonally and then slide an infinite number of squares vertically or horizontally. It is only allowed to walk one square diagonally. It cannot jump and the unobstructed path must start with a diagonal movement. 
Rhinoceros Moves one square vertically or horizontally and then slides away an indefinite number of squares diagonally. It is authorized to go only one square along its rank or file. It cannot jump, and the unobstructed path must start with the orthogonal movement 
Lion It moves like general + alibaba 
Giraffe It jumps to the opposite square of a 3x4 rectangle, like an extended Knight, no matter what any intermediate square contains. Note that it always changes the color of its square
buffalo combines the leaps of the Knight (2,1), the Camel (3,1) and the Giraffe (3,2) 
and much more ........................
Gigachess 2
how to play: https://www.chessvariants.com/rules/gigachess-ii