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xg vs gnubg containment position

Posted By: eXtreme Gammon
Date: Thursday, 31 July 2014, at 5:20 p.m.

In Response To: xg vs gnubg containment position (Ian Dunstan)

There is a difference between GnuBG cubeless RO and XG's.

In GnuBG it basically assume the cube cannot be turn and will play checker play accordingly.

In XG, it knows the cube can be used and will play the checker accordingly, but it will never double.

To make a comparison you need to set the position (not the RO) as cubeless via the menu "setup>>Maximum cube value>>cubeless", then you can pick any RO setting you want.

		White is Player 2 score: 0 pip: 158 Unlimited Game pip: 72 score: 0 Blue is Player 1
XGID=bEDD----------bbbbbc---AA-:0:0:-1:65:0:0:0:0:0
White to play 65

1.	Rollout1	Bar/20 Bar/19	eq: +0.771
	Player: Opponent: 79.57% (G:22.27% B:0.86%) 20.43% (G:5.09% B:0.03%) Conf.: ± 0.027 (+0.744...+0.799) Duration: 3 minutes 10 seconds
1 1296 Games rolled with Variance Reduction. Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.206.pre-release

As containment is surely a weakness of XG2 here is a RO with the verison 3 engine that is in development

		White is Player 2 score: 0 pip: 158 Unlimited Game pip: 72 score: 0 Blue is Player 1
XGID=bEDD----------bbbbbc---AA-:0:0:-1:65:0:0:0:0:0
White to play 65

1.	Rollout1	Bar/20 Bar/19	eq: +0.815
	Player: Opponent: 80.95% (G:23.21% B:0.82%) 19.05% (G:4.45% B:0.01%) Conf.: ± 0.019 (+0.796...+0.834) Duration: 2 minutes 30 seconds
1 1296 Games rolled with Variance Reduction. Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 3 alpha

It is interesting to see the CI went down significantly, showing the new engine has a much better idea of how to handle these positions

Messages In This Thread

• xg vs gnubg containment position
  Ian Dunstan -- Thursday, 31 July 2014, at 1:35 p.m.
  • xg vs gnubg containment position
    eXtreme Gammon -- Thursday, 31 July 2014, at 5:20 p.m.
    • xg vs gnubg containment position
      neilkaz -- Thursday, 31 July 2014, at 5:40 p.m.
      • xg vs gnubg containment position
        eXtreme Gammon -- Thursday, 31 July 2014, at 9:02 p.m.
      • xg vs gnubg containment position
        Timothy Chow -- Thursday, 31 July 2014, at 9:25 p.m.
    • eXtreme Gammon — Cubeless versus No Cube
      Taper_Mike -- Thursday, 31 July 2014, at 11:27 p.m.
  • xg vs gnubg containment position
    Bob Koca -- Thursday, 31 July 2014, at 6:52 p.m.
  • xg vs gnubg containment position
    Bob Koca -- Thursday, 31 July 2014, at 9:51 p.m.
    • xg vs gnubg containment position
      Ian Dunstan -- Friday, 1 August 2014, at 2:22 p.m.