Mirror Shift brings online Reversi to the ZX Spectrum and modern PCs
Mirror Shift 1.0, released on 9 September 2026, brings two-player online Reversi to the ZX Spectrum 48K, Spectrum Next and SpectraNext cartridge, alongside Windows, macOS and Linux. Created by M. Ignacio Monge Garcia, the game supports cross-platform matches: a classic Spectrum can challenge a modern desktop, another Spectrum or one of its newer relatives.
Players connect through direct TCP or MQTT, with the latter allowing both opponents to join a shared server and room without requiring an incoming connection to the host. There are legal-move hints, in-game chat, clocks, rematches and requests to undo a move, plus saved games that can be resumed with both players’ approval. Customisable boards and disc sets add some visual variety, while the Next edition benefits from full-colour tiles and hardware sprites.
The game is open source under GPL-2.0, with ready-to-run packages and source code available on GitHub. One practical detail for original Spectrum owners: the Classic version requires divMMC/esxDOS storage and a supported ESP-AT networking interface. Your rubber-keyed machine can join the match, but it needs a little help getting online.