Comments/Ratings for a Single Item

Could I get help with this?

set wbl (e3 f2);
def other cond == #0 #wbl.0 #wbl.1 cond == #0 #wbl.1 #wbl.0 0;
print fn other e3;

The result is always 0, but I would expect f2.

I agree with you that it should produce f2, and that is what it produced when I ran it.

ok, now it does for me too. Thanks anyway.

How and where to set brouhaha squares?

Through the Play-Test Applet?

In preset made through Play-test

Unfortunately creating holes in the PTA does currently not work, and for a long time I could not repair it, because a wrong classification of the format destroyed the page on any edit. But now that I changed the format to 'text' I can fix things again, so I guess it is high time I do that. In the PTA you would create a brouhaha square by creating a hole and placing a piece on it.

The simplest way to do it now is add a line to the Pre-Game code by hand:

set brouhaha (...);

with ... a space-separated list of the square labels of the squares you want to be brouhaha squares.

Where, after which constants/words it should be to work properly? Now it isn’t.

Basically anywhere theat is not inside the definition of another array. Just adding it as a line at the bottom should do.

If you want help in making a preset, it would be useful to post a link to it...

https://www.chessvariants.com/play/pbm/play.php?game%3DRadioactive+Queen+Chess%26settings%3Djoyful-rqc

Well, that works as designed. When you move the Radioactive Queen away from d1, d1 disappears.

How to make other squares on 1 rank holes?

You have to indicate that in the FEN of the preset. (I think by a dash.)

Well, it works! but how to enforce that first white’s move must be by Superpiece?

how to enforce that first white’s move must be by Superpiece

in the pre-game section add setflag firstmove;

and in post-move 1 add

if != #mover S and flag firstmove:
  die "You must move the S on your first turn";
  unsetflag firstmove;
endif;

if capture and match $old (bl br):
    capture where $dest direction $origin $dest;
endif;

I put this in the post move, but when it runs it captures the piece at $dest rather than the specified location. It works correctly if I change it to

if capture and match $old (bl br):
    set x where $dest direction $origin $dest;
    capture #x;
endif;

but I don't see why it would make a difference

But how to set firstmove flag only on the first move? Otherwise it doesn’t let White to move anything but S if flag is in Pre-Move section, and entirely anything if is in Pre-Game section.

Sorry, I really messed that up. This actually seems to work, if you put it in post-move 1. You don't need the flag.

if != #mover S and == movenum 1:
    die "You must move the S on your first turn";
endif;

It must be in the Pre-Game section, not the Pre-Move section. It was just that the unset should not have been within the if-clause, but done unconditionally.

Thanks it works!

For a multi-part move, does the post-move code run just once for the whole thing or once for each part?

For a multi-part move, does the post-move code run just once for the whole thing or once for each part?

Once for the whole thing. To handle multi-part moves, you can rewind the move and handle one part at a time. For details, you can read How to Program Multi-Move Variants for Game Courier or review the code for either Marseillais Chess or Extra Move Chess.

Why doesn't chess need to do that to handle promotions?

Why doesn't chess need to do that to handle promotions?

Promotions are a different type of move than regular moves. Instead of moving a piece from one location to another, a promotion changes the last piece to move to another piece. So, it does not change the values of $origin and $dest. To check whether a promotion has happened, you can compare the value of $moved, which was set when the piece moved from one location to another, with what currently occupies the space moved to (space $dest). When they are different, a promotion has happened, and you can deploy code for testing whether it was a legal promotion.