Quarto

Quarto is a 1996 Macintosh implementation of the modern abstract strategy board game by Alan Weiss, version 1.0. Players race to declare a line of four pieces sharing at least one common attribute -- a deceptively simple rule that produces sharp tactical play on a small board.

The rules

Each piece carries four binary attributes: shape, height, colour, and the presence or absence of a centre dot. A winning line of four must share at least one of these attributes. Crucially, in the original Quarto, a player chooses which piece the opponent will place next -- a twist that turns every move into a double-sided puzzle.

The Mac version

Alan Weiss's 1.0 build is a 68k application that runs on System 6.x through Mac OS 9, fitting the late-90s freeware/shareware idiom of compact, single-purpose game ports for the classic Mac OS.

Why it works on Mac

Quarto's small board and clean iconography suit the monochrome and indexed-color displays of the era. The Mac's mouse-driven UI maps naturally to the two-step "pick a piece, place a piece" rhythm, and the rule set is short enough to memorize from a single About box.

Status

The Garden lists Quarto as version 1.0, 68k, with no later revisions catalogued -- a one-off port that has remained the canonical Mac edition for collectors and emulator users.