Reversi is a board game that sits between checkers and chess in terms of complexity. It’s played on an 8 by 8 board with discs that are black on one side and white on the other. Moves are made into any unoccupied square, but each move must capture at least one of the opponent’s pieces.
When a disc is placed, any continuous run of your opponent’s pieces between that disc and another of your discs will be captured. Captures can be made horizontally, vertically, or diagonally. Captured pieces flip over, changing from your opponent’s colour to your colour. The winner is the player with the most pieces at the end of the game.
This version of Reversi is rendered in full 3D, and allows you to play against either the computer or a friend. Features include:
Five difficulty levels for the computer opponent, from novice to expert.
Unlimited undo of your moves.
Highlighting of legal moves.
Highlighting of the last piece placed.
Move suggestions.
Automatic saving of the current game when you quit.
A legacy version of Reversi is still available for download. If your Mac is running a version of macOS older than 10·13, or if your Mac is having problems with its Metal drivers, then this version will work for you:
Reversi is now a Universal Binary, meaning it runs natively on both Intel and Apple Silicon Macs. As part of this the change Reversi now requires macOS 10·13 High Sierra or later.
This release is the same as 2·0·2 apart from becoming a Universal Binary.
Version 2·0·2 — 27th May 2022
Fixed a bug that caused the game animation to freeze if the Game | Restart sheet was opened and cancelled while animation was in progress.
Version 2·0·1 — 25th September 2021
The Reversi app is now signed and notarized by Apple, meaning it will run without trouble on recent versions of macOS.
This release is the same as 2·0·0 with the addition of signing.
Version 2·0·0 — 12th September 2021
The drawing code has been completely rewritten and now uses Metal instead of OpenGL.
Reversi now utilizes the full resolution of Retina displays.
The piece and board models have been improved.
The pine board edging has been replaced by mahogany.
The board now remains centred vertically when tilting up and down.
The highlight colour for the last placed piece can be customized.
The help has been completely rewritten.
Minimum version of macOS required is 10·12.
Version 1·3·1 — 20th May 2020
Fixed a problem that caused the board to disappear when dragging it with the mouse.
Version 1·3·0 — 10th August 2019
Converted the app from 32-bit to 64-bit.
Now requires Mac OS X 10·7 Lion or later.
Version 1·2·1 — 13th August 2012
Fixed a drawing problem seen when running on OS X 10·8 Mountain Lion.
Version 1·2·0 — 9th July 2011
Fixed a drawing problem on some Macs with integrated GPUs which left the screen looking garbled.
Added options for the appearance of the board squares (marble or jade) and the board edging (cedar or pine).
Fixed a problem that could cause the piece flipping animation to take longer than it should.
Minor user interface tweaks.
New icon.
Version 1·1·0 — 30th December 2008
Added a menu item to immediately start a new game with unchanged settings.
The position of the board (spin and tilt) can be locked in place.
The spin and tilt settings are now saved between sessions, so you can position the board how you like it, and it will stay that way.
Added a preference for faster piece flipping animation.
The board is drawn larger to better fill the window.
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