However, there is one huge problem with Chess: Verifying a game’s end is incredibly costly. For checkmate (king is in check and player cannot make any move to escape) and stalemate (same, except that king is not in check), to verify the condition all possible moves have to be calculated and verified, which is unfeasible on the blockchain. We actually implemented the logic in Solidity, only to find out it exceeds the current limits of a …