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How to play Ouk Chatrang: rules and setup

Ouk Chatrang is played by 2 players on a board with 8 × 8 squares. White moves first. Ouk Chatrang, the chess of Cambodia, adds special first moves for the king and neang to a Makruk-style army.

Play Ouk Chatrang

Quick answer

Ouk Chatrang is the traditional chess of Cambodia, a close relative of Thai Makruk played on an 8×8 board. Pawns start on the third rank and promote to met on the sixth. On their first move, the king may make a forward knight jump and the met may jump two squares straight ahead. Checkmate wins, and endgame counting can force a draw. This guide covers Ouk Chatrang. Check the movement, capture and game-ending rules below before applying rules from another variant.

Players
2
Board
8 × 8 squares
First move
White moves first.

Setup

Game illustration
Game illustration. Follow the setup instructions to prepare a new game.

The same 8×8 arrangement as Makruk: White's king on d1 and neang on e1, Black's neang on d8 and king on e8, koul on c1/f1 and c8/f8, and pawns on the third ranks. The king and neang keep their special first-move rights. White moves first.

Board
8 × 8 squares
Players
2
First move
White moves first.
Rules used here
Ouk Chatrang

Moves and captures

  • Legal moves

    King, rook and knight use chess moves. The koul steps one square diagonally or straight forward; the neang steps one square diagonally. Pawns move one square forward, capture diagonally and become a neang on their sixth rank.

  • Using the board

    Select a piece to see its legal destinations, then select a highlighted square.

Special rules

  • On its first move, if not in check, the king may jump like a knight onto the next rank, two files to either side (b2 or f2 for White, c7 or g7 for Black), without capturing.

  • It loses this right once it has moved or once an enemy rook moves to attack it.

  • On its first move, the neang may jump two squares straight ahead to an empty square.

  • There is no castling or pawn double step.

Winning and draws

  • Checkmate wins.

  • Stalemate is a draw, and there is no 50-move rule.

  • Board count: as soon as a side has three pieces or fewer (king included), even with pawns on the board, its opponent must checkmate by count 64, counting from 1.

  • Bare-king count, once no unpromoted pawns remain and one side has only its king: counting starts from the number of pieces on the board plus one, and the attacker must mate by count 8 with two rooks, 16 with one rook, 22 with two koul, 32 with two knights, 44 with one koul, or 64 otherwise.

  • If the count runs out, the game is drawn.

  • A player may claim a draw on threefold repetition; a position where neither side can checkmate is drawn automatically.

Example

Sources and rule verification

Ruleset covered
Ouk Chatrang
  1. PyChess — Ouk Chaktrang (Cambodian chess) rules
  2. Fairy-Stockfish variants (implementation reference)
  3. Fairy-Stockfish — variant definitions (43b66c8, implementation reference)

This guide describes play on ChessPlayX. Platform-specific conventions are stated in the relevant sections; tournament administration may differ.

A separate rule-review date is not recorded for this guide. The update date is not a verification date.