-8-pieces https://www.youtube.com/watch?v=XZ8K02Da7Ps&list=PLRyjH8DPuzTBiym6lA0r84P8N0HnTtZyN&index=6&t=0s
-https://www.chessvariants.com/rules/8-piece-chess "Eightpieces"
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-"Capture" Chess (idea of opperwezen, maybe not new): captures are forced,
-but the goal is still to checkmate (not lose all material).
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-Cannibal Chess with forced captures.
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-Knightrelay: implement "official" version as Knightrelay v1
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-Antiking: implement v1 (deterministic) https://www.chessvariants.com/diffobjective.dir/anti-king-chess.html
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-Generator vatiant, called "Matrix" ?
-Peces on first rank never move but generate new pieces. Pawn don't generate.
-A generator captured and replaced by a similar piece does not generate.
-King does not generate. No castling. En passant possible?
-Goal is still checkmate.