CATHEDRAL

GOAL
Reduce every enemy below 4 stones of their color. A congregation of fewer than four falls silent — its remaining stones stay on the board, but it has lost.

THE FIELD
A cross of five 5×5 fields. Stones travel along the engraved lines: straight lines everywhere, diagonals only through the larger strong nodes. Each player begins with 15 stones in the outer rows of their arm.

PROCESSION
A stone may move up to as many empty fields in a straight line as the longest unbroken line of friendly stones standing directly beside it — a lone stone always moves at least one field. Long processions are fast, but they convert whole.

CONVERSION (never forced)

• Approach: end your move directly in front of an unbroken enemy line in your direction of travel — the whole line converts to your color.
• Withdraw (optional setting, off by default): move directly away from an enemy line touching your starting field — that line converts. Enable via Convert: Attack + Withdraw in the menu.
• Conversion stops where the line's color changes, at an empty field, or at your own stone. If a move is both approach and withdrawal, choose one.

CHAIN
After converting, the same stone may keep converting — but may never re-enter a field it has touched this turn. You may rest (stop) at any time.

PASSAGE
Exterior walkways circle the crossing, joining the flank midpoints of neighboring arms. A passage is a doorway, not a line: crossing it is always a single step, and nothing converts through it.

FOUR PLAYERS
Blue and Red fill the side arms. Converted stones fight on under their new color; a player who falls below four stones is out, their remnant frozen where it stands — and the game runs until one faith remains.