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This item is a game information page
It belongs to categories: Orthodox chess, 
It was last modified on: 2020-01-30
 By Aurelian  Florea. Apothecary Chess-Classic. Large board variant obtained through tinkering with known games.[All Comments] [Add Comment or Rating]
Fergus Duniho wrote on 2020-07-03 UTC

Since it works for displaying legal moves, it's probably because the Pawn functions are only for potential moves, and the Joker is trying to use one of the Pawn functions when making an actual move. Specifically, I think it fails on the line "and empty #1" in the Pawn function, because that space is occupied for an actual move. Some options include changing your rules, rewriting the Pawn functions to handle both potential and actual moves, or using a Joker subroutine for actual moves, which would let you undo the Joker's move before testing it with a function, then redoing it if it is legal.