Opening book and replies

The data presented here is the result of a collective effort from users of BGonline.org. All the critical play have been made using high setting (XGR+, 4-ply or 3-ply). The data has been completed with rollouts made using XG2 (2-ply checker, 3-ply red cube) and XGRoller++ data.

Last update: 11/24/2013 version 3.70.

  • 3.70: (11/24/2013) most 2nd roll position analyzed in deep settings
  • 3.30: (5/31/2012) Added Non Jacoby openings (Arthur van Houdt and Grant Hoffman) and a few replies (51S-43 and  61P-43: Neil Kazaross, 31P-11, 42P-22 Xavier Dufaure de Citres)
  • 3.20: (1/2/2012) Added Nackgammon Openings (Miran Tuhtan)
  • 3.10: (7/28/2011) Updated -2-2 entries so they use the same than DMP, updated -1-3PC to use the same data than GS, updated -3-1PC to use the same data than GG.
  • 3.06: (7/9/2011) Initial public release.

The opening book can be used freely even without eXtreme Gammon: check here


Opening move


Replies - Unlimited Game (with Jacoby)


  • 21$ 13/11 6/5
  • 21S 24/23 13/11

  • 31P 8/5 6/5

  • 41$ 13/9 6/5
  • 41S 24/23 13/9

  • 51$ 13/8 6/5
  • 51S 24/23 13/8

  • 61P 13/7 8/7


  • 32D 13/11 13/10
  • 32S 24/21 13/11
  • 32U 24/21 24/22
  • 32Z 24/22 13/10

  • 42P 8/4 6/4

  • 52$ 13/8 6/4
  • 52D 13/8 13/11
  • 52S 24/22 13/8

  • 62$ 13/5
  • 62R 24/16
  • 62S 24/18 13/11


  • 43D 13/10 13/9
  • 43S 24/20 13/10
  • 43U 24/20 24/21
  • 43Z 24/21 13/9

  • 53P 8/3 6/3
  • 53S 24/21 13/8

  • 63R 24/15
  • 63S 24/18 13/10
  • 63Z 24/21 13/7


  • 54D 13/9 13/8
  • 54S 24/20 13/8

  • 64P 8/2 6/2
  • 64R 24/14
  • 64S 24/18 13/9

  • 65R 24/13

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