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Possible bug in Grand Cavalier Chess[Subject Thread] [Add Response]
wdtr2 wrote on Sun, Aug 8, 2021 08:50 PM UTC:

I think I may have found an issue in Grand Cavalier Chess. In Self-play mode - 2 people on same PC. The Cavalier (Knight Pawn) is not able to get to the last rank for capture or promotion.

===

Question: according to the rules If you do not have any captured pieces the Cavalier can not promote. Can it go to the last rank for a capture and not promote if you have no captured pieces? ===

Can you check this?

Thank you.

Jim


🕸Fergus Duniho wrote on Mon, Aug 9, 2021 02:15 AM UTC in reply to wdtr2 from Sun Aug 8 08:50 PM:

Here is the relevant rule:

When there are no captured pieces a Cavalier may promote to, it may not move to the last rank, though it may still check the Eques Rex on the last rank.

Is there a violation of this rule?


wdtr2 wrote on Wed, Aug 11, 2021 10:29 AM UTC in reply to Fergus Duniho from Mon Aug 9 02:15 AM:
Hi Fergus, thank you for the reply.  I think there is a violation to this rule.  The following is an example:
1. H d3-c5 
1... h g8-h6 
2. I c1-g9 
2... x f10-g9 
3. H c5-d7 
3... x g9-h9 
4. H d7-f8 // - Check! -
4... x h9-i9 
5. C j2-j3 
5... q e10-e9 
6 . H F8-    Can not promote?
=====
This was done in self-play mode. 2 people at the same PC.
In move #6 I thought the Cavalier could pop-into the last rank, and promote to the night-rider it lost.
===

🕸Fergus Duniho wrote on Wed, Aug 11, 2021 05:55 PM UTC in reply to wdtr2 from 10:29 AM:

It's not so much that there is a bug here but that this preset was written before I gave Game Courier the ability to move pieces by clicking with the mouse. So, I did not program it to handle partial moves. As long as you enter the whole move at once, which will require some typing, it will allow the promotion. I will eventually get around to updating this preset or replacing it with a new one.


wdtr2 wrote on Wed, Aug 11, 2021 11:03 PM UTC in reply to Fergus Duniho from 05:55 PM:
ok, great.   Thank you.

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