[net.games] Is this really gammon?

lab@qubix.UUCP (Q-Bick) (02/18/84)

Saratoga Slick is back, with a different game and a new bug. Behold:
4.1c BSD backgammon
_________________________________________	(folded for clarity)
|                 |   |                 |	Game value 2.
|13 14 15 16 17 18|   |19 20 21 22 23 24|       White doubled last.
|       w         |   |                 | rrr
|                 |   |                 | rrr   White rolls 5 3 and moves
|                 |   |                 | rrr   	18-15,7-2
|                 |   |                 | rrr   Red rolls 6 1. Move:
|                 |   |                 | rrr           24/6,24/1
|                 |BAR|                 |       Gammon! Red wins 4 points.
|                 |   |                 | ww
|                 |   |                 | ww
|                 |   |                 | ww
|                 |   |                w| ww
|                 |   |             w  w| www
|12 11 10  9  8  7|   | 6  5  4  3  2  1|	***Is this REALLY Gammon?***
|_________________|___|_________________|

Amusing (only because I won) side note:
White had had an 11-0 lead in men cast off. Red had two guys sitting
on White's Ace, waiting for a blot. None occurred so Red was forced to
consolidate his home table some more. Finally, he could no longer handle
the throw in his home table, so one of his back men was moved. White hit
the blot on 1, and left another on 2, with two men on 3.

Red rolled snake-eyes. White needed 3 turns to get the first guy off the
bar. Two turns later, his man still on the bar got some company again,
courtesy of a steamrolling Red. Red got double-6 on his next turn, but
White still needed several turns to get both men back on.

White never got another man off. Once down 0-11, Red won 15-11.
"The opera isn't over till the fat lady sings."
			-- Washington Bullets Coach Dick Motta,
			   when Seattle held a 3-2 in the best-of-7 series
			   (which Washington won 4-3)
-- 
				The Ice Floe of the Q-Bick
				{ucbvax,ihnp4}!{decwrl,amd70}!qubix!lab
				decwrl!qubix!lab@Berkeley.ARPA

rjnoe@ihlts.UUCP (Roger Noe @ N41:48.5, W88:07.2) (02/19/84)

No, the position given is not gammon--white had one or more pieces off.
	Roger Noe		ihnp4!ihlts!rjnoe

wildbill@ucbvax.UUCP (William J. Laubenheimer) (03/28/84)

Nope. The gammon and backgammon multipliers are only in effect if the
losing player \\has not borne off any men//. The position of the remaining
men is irrelevant - white can have one man borne off and the other 14
on the bar, and it is still no backgammon. Also, you can have all of your
men in your own inner table, but if your opponent bears off all his men
before you take one off, that is a gammon. Thus, this position is not
a gammon.
                                        Bill Laubenheimer
----------------------------------------UC-Berkeley Computer Science
          ...Killjoy WAS here!          ucbvax!wildbill

ech@spuxll.UUCP (Ned Horvath) (03/31/84)

Oops! wrong!  A backgammon is not necessarily a gammon: the latter occurs
when one player has borne off no men; the former when a player is left with
one or more men on the bar or on the opponent's home board.  It is possible
to have borne men off (avoiding gammon) and still be backgammoned.

=Ned=