Jacynth is a 2-player area control/city building game with some hidden information, played with a multi-suited deck of cards called the Decktet.

• Learn about the Decktet at the official Decktet site
• Jacynth rules at the Decktet wiki
• Jacynth rules PDF, including an introduction to the Decktet and rules for four other games, at the official Decktet site
• Jacynth at BoardGameGeek
• Other Decktet Games at Abstract Play

There's a computer vs. human implementation of Jacynth by Dylan Cairns online here.

A Decktet city: play cards, drop influence, and control the most area.

Inventor: P.D. Magnus

See Decktet wiki: Jacynth. Uses the Decktet.

When the deck and hands are exhausted, the player controlling the most area (influence on the tableau) wins. 2 or 3 players.

Default Razeway: six cards start in a diagonal. Each player has a hidden hand. Influence tokens are placed on cards (not on Excuse, Pawns, or Courts in the extended deck).

Play a card adjacent to the city, matching suits as the wiki requires, and optionally place or move influence. Exact adjacency and scoring follow the Decktet wiki; the engine rejects illegal plays.

Excuse, Pawns, and Courts (no influence on those cards).

Different starting tableaux.

• Current engine version: 20241212 (2024-12-12). On Abstract Play since 2024-12-15.

• Hands are hidden from opponents and observers.

• http://wiki.decktet.com/game:jacynth
• https://boardgamegeek.com/boardgame/39290/jacynth