No Fergus.

It didn't make a difference.

I got three emails for acepted invitations for the 3 games below, and for all of them had no body in the email, just an attachment called ATT001.

http://play.chessvariants.com/pbm/play.php?game=Chaturanga+-+Davidson+Variation&log=j_carrillo_vii-makov333-2016-206-997

= = =

on a 2nd note... I got again the error below for the last of the three games above (the one against makov).

lastmovenum = 0; movenum =

WARNING: As a safety precaution, you cannot move and take back a move at the same time.

If you mean to take back a move, do that before you move. This will let you see the board accurately when you do move.

If you did not mean to take back a move, set the drop-down box with the history of your moves to the last move made.

=

This is a new preset I created for Chaturanga - Davidson Variation, which enforces the rules.

Have I done something wrong in the preset instructions to cause this error?

I tested the preset extensively (PLAY mode), and I never got this error.

I checked the last time I got this error (on July 21st, Carlos Cetina had reported it too), and that time the values of the variables was different:

lastmovenum = ; movenum = 0

Thanks Fergus,

Yes, the original error seems to be gone.

But now when I try the move, the board background changes from the original (astapada-marble2.jpg), and the astapada-marble2.jpg is not among the available options on the move Preview screen.

If I move, by default the board will change to: chess-greenbeige.png

Excellent!!! Thanks Fergus.

Problems solved. Thanks for the "remind" hint.

I'll learn to live with the email issue. It only happens for the accepting of an invitation anyway.

Cheers, Jose

Thanks Fergus.

Fergus,

On a secondary note, the Bare King code logic for two Bare Kings being a draw, doesn't seem to be working.

I tested it in your Shatranj preset and when the first king was bared, it gave the win to one side, and still allowed me to play and bare the other king, giving a win to the 2nd side.

No Fergus, I tried it, and didn't work.

I just setup a random position where one King would bare the other, and the other lone King could bare the first on his next move. Based on a quick view of your new code in Shatranj, I expected it to end the game saying that: "Both Kings Bared on Next Move! Game Drawn!", but this didn't happen. The game carried on.

I used a different approach in my Chaturanga Davidson's Variation: (Below is the code for Post-Game 1, for white)

if == 1 count onlylower:
  set enemies onlyupper;
  if > count #enemies 2:
    say Bare King! White Wins!;
    won;
  elseif == count #enemies 1:
    say Both Kings Bared! Game Drawn!;
    drawn;
  endif;
endif;
if == 1 count onlyupper:
  set enemies onlylower;
  if >= count #enemies 2:
    say Bare King! Black Wins!;
    lost;
  endif;
endif;

I'm actually allowing the Lone King to play one more move. If he can bare the opponent's King, the game is a draw. If the lone King cannot bare the opponent on the next move, then he automatically losses the game.

Fergus, here is the link:

http://play.chessvariants.com/pbm/play.php?game%3DShatranj%26settings%3DAlfaerie-CSS-test

I just tested it again, and it worked for when White bared Black without giving check: 1.Rxe4 draw.

But it didn't work when I tried a "check" scenario (which happened to be the one I first tried last time): 1.Kf3 Rxf4+ and the game continues.

Now I believe the issue is more related to the "check" than the Bare code.

I see now how is it working.

If after the check: 1.Kf3 Rxf4+

white takes the checking piece: 2.Kxf4 the game is automatically a draw. (this makes sense)

But if white didn't take, say he played 2.Ke2 then Black wins after his next move 2... Kd4 0-1 (Bare King Rule)

The question now is, whether the game should have been an automatic draw right from the begining, after 1... Rxf4+, without white having to play (like it is the case now, when a player bares the other but without check).

Thanks Fergus for updating the code, and for the hint on passing positions to existing presets.

You can delete the preset I created for Shatranj during this excersize.

Cheers!

Hi Fergus,

In reviewing your solution for the Bare King rule problem, I see a variable called "status" which I can't find where in the Shatranj code is previous set. Is this a global variable? How does it work?

Thanks.

= = =

set checks sub checks #k;
if sub checkmated #k #checks and var checks:
  say Checkmate! White has won!;
  won;
elseif var checks:
  say Check!;
elseif sub stalemated #k:
  say Stalemate! White has won!;
  won;
endif;
if == 1 count onlylower and == status Ongoing:
  set mypieces onlyupper;
  switch count #mypieces:
    case 1:
      say Both Kings Bared! Game Drawn!;
      drawn;
      break;
    case 2:
      foreach (from piece) #mypieces:
        if == #piece K:
          continue;
        elseif not fn k #k #from or fn K #K #from:
          say Bare King!! White Wins!!;
          won;
          break;
        else:
          say Both Kings Bared on Next Move! Game Drawn!;
          drawn;
          break;
        endif;
      next;
      break;     
    default:
      say Bare King! White Wins!;
      won;
      break;
  endswitch;
endif;

Thanks Fergus.

= = =

Another question... What triggers a preset to display the legal moves when one clicks on a piece?

I created two presets enforcing the rules of the game, and based on the Shatranj include file.

However onedisplays legal moves, and the other doesn't.

The Makruk one below, shows the legal moves:

http://play.chessvariants.com/pbm/play.php?game%3DMakruk+%28Thai+chess%29%26settings%3DAlfaerie2r

The Chaturanga - Davidson Variation doesn't display the legal moves (even though it's enforcing them right):

http://play.chessvariants.com/pbm/play.php?game%3DChaturanga+-+Davidson+Variation%26settings%3DAlfaerie

What is the trigger to display the legal moves?

Thanks.

Thanks Fergus.

Now that makes sense (that my preset is not displaying legal moves), because that varitation (Charturanga - Davidson's Variation) doesn't have neither checkmate nor stalemate. A win is determined by capturing the enemy King.

I'll read the tutorial to see how to emulate that effect in my code. Thanks.