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H. G. Muller wrote on Sun, Jul 14 06:44 PM UTC in reply to A. M. DeWitt from 01:46 PM:

OK, I solved the 'promoting Kirin' bug. This was due to the AI comparing the capture square with the origin of the previous move, rather than the destination.

The adjacent case is partially due to a 'calculated risk': the exemption of adjacent Lions from the protection rule is motivated by the fact that you would never want to capture a protected Lion by replacement if you could capture it throug hit & run. Making the same exception for a piece not capable of locust capture makes no sense. To make the rule also useful for such pieces, I dropped the adjacency condition from the implementation of the rule in the Interactive Diagram. The AI might erroneously believe it was illegal, but it would virtually never want to play it anyway. And when the highlights were still only pseudo-legal, it would not make any difference there either.

The other part of the problem might be solvable in the highlighting: even though it thinks the replacement capture is illegal, it thinks locust capture is allowed, so there also is a cyan start highlight on that square. (Which overrules the red triangle for the direct capture because of the order of these in the XBetza spec.) I guess I should in any case refrain from overruling the star marker by a cross. The cross then would still appear in the highlights for the second leg, for the click that would select termination after the first leg, though. But that is the move you would almost never want to play, so this might be excusable. After all, moving the King in check is also highlighted by a cross now, and that is not strictly forbidden in Chu Shogi either. So the meaning of the cross should be taken a bit liberally, as 'not recommended', rather than strictly forbidden.

The third case was due to forgetting to strip off the color bit when looking up the anti-trade properties when testing whether the replacement victim had to be replaced by the locust victim when setting the temp-iron type.


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