The goal is to reduce your opponent to 2 pieces or block them from making any legal moves.
Both players start with 9 pieces in reserve. You take turns placing one cat on any vacant point on the board. When all 18 pieces have been placed, the game enters Phase 2.
On your turn, slide one of your cats along a grid line to an adjacent vacant point. You cannot jump over other pieces.
When a player is reduced to exactly 3 pieces, their cats are freed from the grid lines and can "fly" (jump) to any empty point on the board.
If you align three of your cats in a straight line along any board line, you form a "Mill"! This allows you to remove one of Stanley's grey cats from the board.
Rule: You cannot remove a cat that is currently part of Stanley's active mill, unless Stanley has no other cats available on the board.
Nine Men's Morris (adapted here as Nine Cats' Morris) is one of the oldest strategy board games in human history, played across centuries and continents.
The game is incredibly ancient. The earliest known board is carved into the roofing slabs of an Egyptian temple at Kurna, dating to approximately 1440 BCE. It was widely played throughout the Roman Empire by soldiers and civilians, and boards have been excavated at Bronze Age sites in Ireland, ancient Troy, and even on Viking ships (such as the Gokstad ship in Norway).
The word "Morris" is believed to derive from the Latin word merellus, meaning a "gaming piece" or "counter," which evolved into "merels," "merrells," and eventually "morris." The specific name "Nine Men's Morris" was famously popularized in English literature by William Shakespeare in his play A Midsummer Night's Dream (Act II, Scene 1), where Titania laments: "The nine men's morris is fill'd up with mud."
We know the rules through medieval manuscripts recording board game instructions, most notably the Libro de los Juegos (Book of Games), commissioned by King Alfonso X of Castile in 1283. Archaeological discoveries of boards scratched into tavern tables, cathedral benches, and monastery pews also confirm how the game was played throughout medieval Europe. Over centuries, the game was passed down continuously, surviving under names like "Merrills" and "Cowboy Checkers."
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