Overview

Emergo is a two-player abstract strategy game in the column checkers family, created by Christian Freeling and Ed van Zon in 1986. It is played on the dark squares of a 9x9 checkered board. The game has two distinct phases: an entering phase where players place pieces onto the board, and a movement phase where pieces move and capture like checkers, but with a stacking mechanic – captured pieces are added beneath the capturing stack rather than removed. Emergo is Christian Freeling’s personal favorite among his many game designs.

Components

• 1 checkered board (9x9, with black corner squares)
• 24 stackable checkers (12 per player, in two colors – typically white and black)

Setup

1. Place the empty 9x9 board between the players. Only the dark (black) squares are used for play.
2. Each player holds their 12 pieces in hand. No pieces start on the board.
3. White moves first.

Turn Structure

The game has two phases:

Phase 1: Entering Phase

Starting with White, players alternate turns. On each turn:

1. Enter a piece: Place one of your pieces from your hand onto any vacant dark square on the board.
2. Or capture: If a capture is possible, you MUST capture instead of entering a piece. When multiple captures are possible, you must make the capture that takes the largest number of pieces (maximum capture rule).

The entering phase continues until all 24 pieces have been placed on the board. However, captures during the entering phase may reduce the number of pieces on the board.

Phase 2: Movement Phase

Once all pieces have been entered (or both players have no more pieces in hand), the movement phase begins. On each turn:

1. Move one piece or stack one square diagonally to an adjacent vacant dark square.
2. Or capture (mandatory if possible). You must make the maximum capture available.

Actions

Movement

A single piece or a stack you control (your piece is on top) moves one square diagonally to an adjacent vacant dark square. Movement is always exactly one square.

Capturing

Captures work similarly to checkers but with a critical stacking difference:

1. Jump over an adjacent opponent piece (or stack with an opponent piece on top) to a vacant square beyond.
2. The top piece of the jumped opponent stack is taken and placed under your capturing piece/stack.
3. Multiple jumps in a single turn are allowed (and required if available).
4. A piece’s direction of jump is unrestricted – you can jump in any diagonal direction during a multi-jump.

Stack Control

A stack is controlled by whichever player’s piece is on top. When you capture an opponent’s stack, you only take the top piece – the rest of the stack (with a new top piece) may now be controlled by a different player.

Maximum Capture Rule

If multiple captures are possible on your turn, you must choose the capture sequence that results in the greatest number of pieces captured. This is mandatory.

Scoring / Victory Conditions

Winning

The game is won by capturing all of the opponent’s pieces. If a player has no legal moves on their turn, they lose.

Draw

If both players agree, a draw can be declared. In practice, draws are rare due to the stacking mechanic constantly changing board dynamics.

Special Rules & Edge Cases

• Captures are mandatory. If you can capture, you must.
• The maximum capture rule means you must always choose the path that captures the most pieces.
• During the entering phase, capturing takes priority over entering a new piece.
• Stack ownership can change rapidly as pieces are captured and recaptured.
• A stack with your piece on top may contain opponent pieces beneath – these are “prisoners” that cannot move independently but may be freed if the stack is captured by the opponent.
• The four-connectivity of dark squares on a 9x9 board (with black corners) provides a unique geometric basis for the game.
• There are no kings or promotion – all pieces move identically.
• The entering phase adds a strategic dimension not found in standard checkers.

Player Reference

Board: 9x9 (dark squares only, 41 squares)

Pieces: 12 per player, start in hand

Phase 1 (Entering): Place one piece on any vacant dark square, OR capture if possible (mandatory)

Phase 2 (Movement): Move one square diagonally, OR capture (mandatory)

Capture: Jump opponent’s top piece; it goes under your stack. Multi-jumps allowed.

Maximum capture rule: Must choose the capture path that takes the most pieces

Win condition: Capture all opponent pieces or leave opponent with no legal moves