Re: [Bug-gnubg] gnubg defends poorly against outer primes

[Jim Segrave]

On Mon 24 Nov 2003 (10:27 +0000), Joern Thyssen wrote:
> On Sun, Nov 23, 2003 at 08:01:24PM +0100, Misja Alma wrote
> > 
> > As far as I can
> > see the only solution would be to implement an export to Snowie
> > format? 
> 
> It's probably not the only solution. Snowie support it's own extension
> to the .mat format, where illegal moves or incomplete games can be set
> up using a specialised string identical to the Snowie .txt position
> files.

do we have that documented? Is it similar to the one Oystein raised
last night? Because if it is, then exporting rollouts in that format
should be easy - the export of rollout .sgf files is pretty
straightforward - there are four functions in rollout.c:

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# exec bash
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034  SUBJECT: Mail: Returned To Sender
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031  SUBJECT: New Net Critical Pack
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045  SUBJECT: undeliverable message: user unknown
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On Mon 24 Nov 2003 (10:27 +0000), Joern Thyssen wrote:
> On Sun, Nov 23, 2003 at 08:01:24PM +0100, Misja Alma wrote
> >
> > As far as I can
> > see the only solution would be to implement an export to Snowie
> > format?
>
> It's probably not the only solution. Snowie support it's own
 extension
> to the .mat format, where illegal moves or incomplete games can be
 set
> up using a specialised string identical to the Snowie .txt position
> files.

do we have that documented? Is it similar to the one Oystein raised
last night? Because if it is, then exporting rollouts in that format
should be easy - the export of rollout .sgf files is pretty
straightforward - there are four functions in rollout.c:

void log_game_start (char *name, const cubeinfo *pci, int fCubeful,
                     int anBoard[2][25]) 

   called with the file template (name), the cube and board at the
   start of the rollout and a cubeful/not flag. This generates the
   .sgf header but could generate the beginning of a .mat file with
   the position setup.

void board_to_sgf (int anBoard[25], int direction)

   The bit of log_game_start which generates the current position

void log_move (int *anMove, int player, int die0, int die1) 

   generates one player's move

void log_cube (char *action, int player) 

   generates one player's take/double/drop 

I think with a clear spec of how the position is set up, the rest is
very easy to do.

What it looked like from Oystein's posted match:

There's a 32 field line. Each field is a number, negative numbers are
player 1. The first 6 fields are unknown in
use, but are probably cube and chequers off for each player. I think
(but haven't seen one yet) that field[6] is a count of chequers on the
bar for player 0 (0..15). fields 7..30 appear to be the points from
player 0's view (field[7] = player 0's ace point. The value is the
number of chequers on that point, negative if they are player
1's. Field[31] is the number of chequers on the bar for player 1 (0
.. -15)

So the starting position would be:

f 0..5      0  0  0  0  0  0     # all unknown at this time
     6      0                    # no player 0 off
  7..12    -2  0  0  0  0  5     # player 0 home board
 13..18     0  3  0  0  0 -5     # player 0 outer board
 19..24     5  0  0  0 -3  0     # player 1 outer board
 25..30    -5  0  0  0  0  2     # player 1 home board
     31     0                    # no players off

But in the file all one line:

0 0 0 0 0 0 0 -2 0 0 0 0 5 0 3 0 0 0 -5 5 0 0 0 -3 0 -5 0 0 0 0 2 0
  

All we need is to see how the beginning values look and check that
player 0 off is in field[6].

Arbitraty but recognisable chequer placements and the following:

a match to 9, score 6-5 cube on 2 owned by player 0, player 0  one man on bar.
a match to 7, score 4-3 cube on 4, owned by player 1, player 0 has 1 man off
a match to 5, score 2-1 cube centred, player 1 has 2 men off
a match to 3, Crawford-0 
money game, Jacoby
money game, no Jacoby (if allowed)

> Unfortunately, gnubg can only import such .mat files, but not export
> them. 


-- 
Jim Segrave           address@hidden