USDescartes wrote: ↑09 May 2024, 01:45
euklid314 wrote: ↑18 April 2024, 07:51
I think tetrisz meant that the BGA implementation allows you to double even if you are only 1 point away. This is an incorrect implementation because doubling in this situation is an illegal move. In real life tournaments this in facts happens every now and then because you are stressed and do not pay attention. As soon as it is noticed it is undone by the arbiter - because doubling in such situations is illegal.
I filed a bug report back when it was beta game backgammonmatchplay but this is a minor bug. At the moment, one just needs to pay attention to not play such an illegal doubling move which only hurts yourself.
I think that's a bad interpretation. Not every match uses Crawford Rule. Does pretty much every official tournament? Sure. But LOTS of times home matches and home tournaments do not. In fact, I don't think I've ever played in a home tournament that DOES use Crawford.
I'm not saying that it couldn't be an option – or even that it shouldn't be the default option. But saying that it is an "incorrect implementation" because it is "an illegal move" is just plain wrong.
You seem to misinterpret my comments. My comments were not about the Crawford rule at all, but about the games after the Crawford game.
I give an example. If Player A wins a game and the match score increases from 5:2 to 6:2 for Player A (in a match to 7 points) there is a Crawford game. No player can double. If Player B wins the score is 6:3 in favor of player A.
Now the score is 6:3 post-Crawford and player B can double (and should do so at his earliest opportunity) but player A is *not* allowed to double by the rules! If player A doubles or redoubles by mistake (because he/she is not paying attention to the match score) an arbiter or tournament director will undo the effect of this double - even several moves later.
Here on BGA, player A can double even if he is already at 6 points! This is a (minor) bug.
Or a different example, if player A is leading 5:0 in a 7-point match and his opponent has doubled, by the rules, player A cannot redouble. Simply because the cube value of 2 is enough to win the match. The backgammon rules do not allow you to redouble from 2 to 4 in such a situation.
Here on BGA, player A can double in such an illegal situation. This is a (minor) bug.
Note: tetrisz has written "the player who is 1 away to the score can't double after crawford game." He might have meant (his words are not 100% clear) that after the crawford game the leading player can't double by the rules but he can double on BGA. Thus my response.