BG Space Play

Match analyzer

A separate product at analyzer.bgspace.games: it evaluates a position, explains cube decisions and goes through a played match move by move.

Analyzer: position evaluation with ranked moves and probabilities

Rules in short

  • Position evaluation: every move ranked, with the equity difference
  • Win, gammon and backgammon probabilities for both sides
  • Cube card: ND / DT / DP, the cost of the error and the market window
  • Rollouts: the position is played out thousands of times, with confidence intervals
  • Heat map: what each of the 36 rolls does in this position
  • Match analysis: PR for checkers and cube, luck, equity graph
  • Accepts .mat (GNUbg/XG), .sgf, XGID and GNUbg Position ID

Cube decisions on their own card

Double, take or pass — with the numbers, the name of the correct action, the cost of the error and the market window: from which winning percentage doubling pays off and from which the opponent must already pass.

Cube decision card with ND, DT and DP numbers

Our own engine, not a wrapper

Positions are evaluated by our own neural network, trained on our own corpus of games. GNUbg is used only as a test reference during development and is not part of the product. Long backgammon has a separate mode with its own engine: no world-class program plays it, so there was nothing to compare against and the network had to be trained from scratch.

From the platform you reach the analyzer without a second password: after a match there is an “Analyse” button, and the analysis opens for both players of that game.