Re: [Bug-gnubg] Question about position ID

[Øystein Johansen]

address@hidden wrote:
> The gnu manual gives this example of the binary representation of the
> position ID for the starting position:
> (Note the ***'s.)

[snip]

> Why is the status of the barpoint recorded twice for each player? Does
> one of these actually represent the number of checkers borne off? (If
> not, it looks like it is not represented.

Unclever use of language and expresions. The author of this text means
barpoint (= 7-point and 18-point), when he/she writes 'bar'.

 0 0 0 0 0 = player on roll has no chequers on ace to 5 points
 11111 0 = 5 chequers on the 6 point
*0 = empty bar (means barpoint = 7-point)
 111 0 = 3 on the 8
 0 0 0 0 = no others in our outfield
 11111 0 = 5 on the midpoint
 0 0 0 0 0 = none in the opponent's outfield
 0 0 0 0 0 = or in opponent's board, until...
 11 0 = two on the 24 point
 0 = none on the bar (This is how many's on the bar)
 0 0 0 0 0 = opponent has no chequers on ace to 5 points
 11111 0 = 5 chequers on the 6 point
*0 = empty bar (means barpoint = 7-point)
 111 0 = 3 on the 8
 0 0 0 0 = no others in opponent's outfield
 11111 0 = 5 on the midpoint
 0 0 0 0 0 = none in our outfield
 0 0 0 0 0 = or in our board, until...
 11 0 = two on the 24 point
 0 = none on the bar (This is number of checkers on the bar)

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