alanback: I just checked a small, random sample of games: the 13 games (or matches) of regular Backgammon played by alanback in 2009. Out of these 13, 6 games start with identical rolls by black and white.
I know, it's hardly conclusive. But still interesting.
grenv: No, expected would be 1 in 18. The first player doesn't roll a double, which means that out of all the 36 possible rolls of the second player, only 2 match the roll of the first player.
grenv: Ok, but if you take out the doubles, there are only 30 possible rolls
But why do you take out the doubles? The second player can roll a double, so the second player has 36 different rolls. 2 of them can match the rolls of the first player.
(nascondi) Se desideri trovare un avversario con una abilità di gioco pari alla tua, guarda nella pagina di valutazione del tipo di gioco desiderato e scegli un giocatore con un punteggio BKR vicino al tuo. (pauloaguia) (mostra tutti i suggerimenti)