Site updates

Every build of this site and what changed, newest first. This page is not linked from the game and is kept out of search engines.

Current build: 2026.11.14.001

• 2026.11.14.001Greg Wright14 Nov 2026

  The first version of the game: backgammon for two players on one screen, or against the computer at ten strengths, with a coach for learning. The rules are complete: both dice must be played if they can be, the larger die if only one can, doubles four times, hitting and the bar, blocked points, bearing off (exact, higher and lower numbers) and single, gammon and backgammon wins. There is no doubling cube yet.

  For learning: gold marks show exactly which checkers can move and where, and clicking a checker that cannot move says why in plain English. Hint suggests a play with the reason (and the standard opening play on the first move). Coach my moves compares each of your turns with the computer's choice. Show danger puts the number of hitting rolls out of 36 on each of your lone checkers. There are pip counts, undo, a move list in standard notation, and practice positions for coming in from the bar, hitting, bringing checkers home and bearing off. The new page learn.html teaches the game from nothing, and help.html explains the site. The game itself is on index.html, with site updates.

  The look, the build and the tests follow the noughts and crosses and Romanian Draughts games: the rules and the computer are in src/engine.js (tested for the rules, for every opening roll, and with whole computer-against-computer games), build.js generates public/, and the browser tests check accessibility in light and dark, the security headers and the keyboard.