AI-friendly board game rules summaries — use with Claude, ChatGPT, or any AI assistant
Caylus is a worker-placement game set in 1289 France where players are master builders constructing a castle for King Philip the Fair. Players place workers on buildings along a road to gather resources, build new buildings, and contribute to the castle. A key mechanic is the provost, a corruptible official whose position determines which buildings activate each turn. The player with the most prestige points wins.
Each turn has 7 phases:
Each player receives 2 deniers plus 1 per residential building owned, +1 for Library, +2 for Hotel.
In turn order, each player either:
Placement costs:
Phase continues until all players have passed.
Resolved in order: Gate, Trading Post, Merchants’ Guild, Joust Field, Stables, Inn.
In passing order, each player may pay 1 denier per space to move the provost 1-3 spaces forward or backward. The provost cannot go before the bridge or beyond the last road space.
Buildings activate in road order from first building after the bridge up to and including the provost’s position. Buildings beyond the provost do NOT activate; workers there return without effect. A player may decline a building’s effect (except production buildings).
Workers placed in the castle contribute resources. Each castle section requires specific resources. Contributors earn prestige points and may gain royal favors. The castle has 3 sections built in order: Dungeon, Walls, Towers.
The bailiff advances along the road. Check if game ends. Return to Phase 1.
Production buildings: Generate resource cubes. Stone buildings (gray) give the owner a bonus cube when activated by another player.
Construction buildings:
The Lawyer: Transform neutral or your own craft buildings into residential buildings (cost: 1 cloth + 1 denier; gain 2 prestige). Residential buildings produce 1 denier income per turn.
Gained from castle contributions, the joust field, and certain prestige buildings. Choose one track:
| Favor Track | Benefit |
|---|---|
| Resources | Take 2 resource cubes (food, wood, stone, or cloth) |
| Money | Take 6 deniers |
| Building | Build one building without using a construction building |
| Prestige | Gain prestige points (2/3/4/5 for positions 1/2/3/4 on track) |
| Building | Effect |
|---|---|
| Gate | Move your worker to any unoccupied space at no cost |
| Trading Post | Take 3 deniers |
| Merchants’ Guild | Move provost 1-3 spaces in either direction |
| Joust Field | Pay 1 denier + 1 cloth for 1 royal favor |
| Stables | Change turn order based on stable placement position |
| Inn | Pay only 1 denier for all worker placements until driven out |
The game ends when the bailiff reaches a designated space on the road. The player with the most prestige points wins.
Prestige is earned by:
Turn phases: Income > Place Workers > Special Buildings > Move Provost > Activate Buildings > Castle > End of Turn
Placement costs: | Where | Cost | |——-|——| | Own building | 1 denier | | Other/neutral/castle | = smallest empty number on passing scale | | First to pass | +1 denier bonus |
Resources: Food (pink), Wood (brown), Stone (gray), Cloth (purple), Gold (yellow)
Castle sections: Dungeon > Walls > Towers (built in order)