History and Origins
Makruk (Thai: หมากรุก, pronounced mak-rook) is the traditional board game of Thailand, commonly referred to as Thai Chess. It is one of the oldest surviving chess variants in the world and remains widely played in Thailand today, both casually and in organized competitions.
The game is descended from the ancient Indian board game Chaturanga, which dates to approximately the 6th century AD and is considered the common ancestor of all modern chess variants. Chaturanga spread westward through Persia (becoming Shatranj) and eventually evolved into Western chess; it spread eastward through Southeast Asia, giving rise to Makruk in Thailand, Ouk Chatrang in Cambodia, Sittuyin in Myanmar, and other regional variants.
Archaeological evidence — including game pieces found at Khmer temple sites dating to the 12th century — confirms the presence of chess-like games in the region long before the establishment of the Thai kingdoms. The game was formally adopted and codified in Thailand around the 14th century, following the Ayutthaya Kingdom’s expansion. Historical records from the reign of King Narai (1656–1688) of Ayutthaya document Makruk as a pastime of the royal court.
Formal national competitions in Thailand began around 1952. The game is overseen by the Sports Authority of Thailand and is regularly played at regional and national levels. Despite the global popularity of Western chess, Makruk has retained a strong following in Thailand, where it is considered a national cultural heritage.
Former Western chess World Champion Vladimir Kramnik played against Thai Makruk masters in 2013 and remarked:
“Makruk Thai is more strategic than international chess. You have to plan your operations with total care since Makruk Thai can be compared to an anticipated endgame of International Chess.”
The Board
Makruk is played on a standard 8×8 square board. Unlike Western chess, the board squares are not checkered — the board is traditionally a plain, uniformly coloured surface. The squares are called dtaa (ตา) in Thai, meaning “eyes,” a term embedded in Thai cultural metaphors for strategic foresight.
Files (columns) are lettered a through h from left to right, and ranks (rows) are numbered 1 through 8 from White’s perspective (White at the bottom, Black at the top), following the same coordinate notation used in Western chess.
There is no concept of light and dark squares in Makruk; unlike the Khon (bishop), no piece is restricted by square colour throughout the game, with the sole exception that the Khon’s movement may land it on different coloured squares than it started from.
The Pieces
Each player begins the game with 16 pieces: one King, one Queen, two Bishops, two Knights, two Rooks, and eight Pawns. Below is a complete description of every piece, including its Thai name, traditional name origin, and movement.
Traditional Makruk sets use hand-carved pieces. The pawns (Bia) are represented by cowry shells; the queen (Met) by a small seed or grain. The king and queen are often distinguished by their height or design rather than by separate piece types. When a pawn promotes, it is physically flipped upside down to indicate its new status as a Bia Ngai (promoted pawn / queen).
| Western Name | Thai Name | Thai Script | Meaning | Abbreviation |
|---|---|---|---|---|
| King | Khun | ขุน | Lord / Master | K |
| Queen | Met | เม็ด | Seed | M |
| Bishop | Khon | โคน | Nobleman / Base | Kh |
| Knight | Ma | ม้า | Horse | N |
| Rook | Rua | เรือ | Boat | R |
| Pawn | Bia | เบี้ย | Cowry Shell | B |
| Promoted Pawn | Bia Ngai | เบี้ยหงาย | Overturned Shell | B+ |
Initial Setup
The starting position of Makruk differs from Western chess in several important ways:
- The pawns (Bia) are placed on the third rank for White (rank 3) and on the sixth rank for Black (rank 6), not on the second and seventh ranks as in Western chess.
- The King (Khun) is always placed to the left of the Queen (Met) from each player’s own perspective, regardless of piece colour.
- Because both kings are positioned to their own left, the two kings are NOT on the same file at the start (unlike Western chess where both kings start on the e-file). This means the setup is not mirror-symmetrical across the centre of the board.
- Rank 1 (back rank, left to right): Rook (a1), Knight (b1), Bishop (c1), King (d1), Queen (e1), Bishop (f1), Knight (g1), Rook (h1)
- Rank 3 (pawn rank): Pawn on a3, b3, c3, d3, e3, f3, g3, h3
- Rank 8 (back rank, left to right from White’s view): Rook (a8), Knight (b8), Bishop (c8), Queen (d8), King (e8), Bishop (f8), Knight (g8), Rook (h8)
- Rank 6 (pawn rank): Pawn on a6, b6, c6, d6, e6, f6, g6, h6
Objective of the Game
The objective of Makruk is to checkmate the opponent’s King (Khun) — that is, to place it in a position where it is under attack (in check) and has no legal move to escape. The player who achieves checkmate wins the game.
A player may also win if the opponent resigns, or may draw under specific conditions described in the Draw Rules section below.
Gameplay Basics
Turn Order
The two players alternate turns. White always moves first. On each turn, a player must move exactly one piece (with the sole exception of certain informal Sutras described later). A player may not pass a turn.Moving and Capturing
A piece moves to a vacant square or captures an opponent’s piece by moving to the square it occupies. The captured piece is removed from the board. A player may not capture their own pieces. A player may not make a move that leaves their own King in check.No Castling
There is no castling in Makruk. The King and Rook may not perform a combined move. The King can only move according to its standard movement rules.No En Passant
There is no en passant capture in Makruk. Since pawns cannot advance two squares on their first move, the en passant rule has no basis in Makruk.No Double Pawn Advance
Pawns may never advance two squares in a single move, not even on their first move. Every pawn move is always exactly one square forward.Piece Movements in Detail
King — Khun (ขุน)
The King moves exactly one square in any direction: horizontally, vertically, or diagonally. This is identical to the King’s movement in Western chess. The King may never move to a square that is attacked by an opponent’s piece. The King may never be left in check after a move. There is no castling.Queen — Met (เม็ด)
The Queen (Met, meaning “seed”) is the weakest piece in Makruk. It moves exactly one square diagonally in any of the four diagonal directions. This movement is equivalent to the ancient queen in Shatranj (called the fers), and is far weaker than the powerful Western chess queen. The Met cannot move horizontally or vertically, and cannot move more than one square per turn. Despite its weakness, the Met is important in endgames as a promoted pawn and as a supporting piece in mating attacks.Bishop — Khon (โคน)
The Bishop (Khon, meaning “nobleman”) has a unique movement that does not exist in Western chess. It moves either:- One square diagonally in any of the four diagonal directions, OR
- One square straight forward (toward the opponent’s side of the board)
Knight — Ma (ม้า)
The Knight (Ma, meaning “horse”) moves in an L-shaped pattern: two squares in one orthogonal direction (horizontally or vertically) and then one square perpendicular to that, or equivalently, one square orthogonally and then two squares perpendicular. This is identical to the knight in Western chess. The Knight is the only piece in Makruk that can jump over other pieces; intervening pieces do not block its movement. The Knight is considered one of the more valuable pieces in Makruk. In endgames it can be particularly powerful because the counting rules give it more counting moves than bishops or queens.Rook — Rua (เรือ)
The Rook (Rua, meaning “boat”) moves any number of squares horizontally or vertically, exactly as in Western chess. It may not move diagonally. It is blocked by intervening pieces and cannot jump over them. It captures by landing on an opponent’s piece’s square. The Rook is the most powerful piece in Makruk, and its relative value is even greater here than in Western chess because the queen (Met) is so much weaker. Two rooks working together can often force checkmate against a bare king in very few moves, explaining the strict 8-move counting limit when two rooks face a lone king.Pawn — Bia (เบี้ย)
The Pawn (Bia, meaning “cowry shell”) moves and captures as follows:- Moves: One square straight forward (toward the opponent’s side of the board). The pawn may never move backward.
- Captures: One square diagonally forward (to either front-left or front-right diagonal).
- No double advance: The pawn may never advance two squares, not even on its first move.
- No en passant: Because there is no double advance, en passant does not exist.
Promoted Pawn — Bia Ngai (เบี้ยหงาย)
When a pawn promotes (see Promotion section), it becomes a Bia Ngai (overturned shell). The promoted pawn moves exactly one square diagonally in any of the four diagonal directions — identical to the Met (Queen). This is the only promotion available. The promoted pawn is physically represented by flipping the cowry shell piece upside down. Multiple pawns from the same player can promote, potentially giving one player many queen-equivalent pieces on the board.Pawn Promotion
A pawn that reaches the sixth rank (rank 6 for White, rank 3 for Black — which is the rank where the opponent’s pawns began) is immediately and compulsorily promoted.
- Promotion is mandatory: a pawn that reaches the sixth rank must promote; it cannot remain a pawn.
- Promotion is always to a Met (Queen / promoted pawn): there is no choice of promotion piece. Unlike Western chess, underpromotion to knight, bishop, or rook is not possible.
- The pawn is flipped upside down to indicate promotion; the piece remains on the board as a Bia Ngai.
- The promoted piece moves as a Met: one square diagonally in any direction.
- There is no limit on the number of promoted pawns; a player can theoretically have eight queens simultaneously.
- Promoted pawns are treated as distinct from the original Met (Queen) for purposes of the counting rules — they count as “promoted pawns” rather than as queens.
Check, Checkmate, and Stalemate
Check
A King is in check when it is attacked by one or more of the opponent’s pieces. A player whose King is in check must resolve the check on their next move. They may do so by:- Moving the King to a safe square.
- Blocking the attacking piece with another piece (only possible against sliding pieces like the Rook).
- Capturing the attacking piece.
Checkmate
Checkmate occurs when the King is in check and the player has no legal move to escape the check. The player whose King is checkmated loses the game.Stalemate
Stalemate occurs when the player whose turn it is has no legal move but their King is not in check. In Makruk, stalemate is a draw, the same as in Western chess and unlike Shatranj (where stalemate was a win for the stalemating player).Perpetual Check
If a player repeatedly checks the opponent’s King and the same position repeats, this may be handled under the draw-by-repetition conventions of the tournament in use. Formal Makruk rules typically follow the principle that threefold repetition of position results in a draw.Draw Conditions and Counting Rules
Makruk has a sophisticated system of draw conditions called Honor Rules (กติกาตาน — gati-ka taan), which govern endgame situations where no unpromoted pawns remain on the board. These rules prevent games from dragging on indefinitely when one side cannot deliver checkmate efficiently.
Notes:
10.1 — The Board’s Honor Rule (กติกาตานกระดาน — Taan Gra-daan)
Trigger: This rule activates when neither player has any unpromoted pawns remaining on the board (all pawns have been captured or promoted). How it works:- The player who is at a material disadvantage (the weaker side) may begin counting moves aloud, starting from 1.
- Each half-move (each player’s individual move) increments the count by 1.
- If the count reaches 64 without a checkmate having occurred, the game is declared a draw.
- The counting player may stop the count at any time if they feel they are no longer at a disadvantage (for example, if they capture a major piece and now have equal or superior material). If they stop, the counting ceases.
- If the counting player stops counting but later wishes to resume, they must restart the count from 1.
- If a checkmate happens during the counting period and the counting player was still counting, it is a legitimate win for the stronger side — the counting player did not stop the count in time.
10.2 — The Pieces’ Honor Rule (กติกาตานหมาก — Taan Mak)
Trigger: This rule activates when both of the following conditions are met:- Neither player has any unpromoted pawns on the board.
- The weaker side has only their bare King remaining (all non-king pieces have been captured).
- When the weaker side is reduced to a bare king, the count is reset to 1 and a new counting limit is determined based on the material of the stronger side.
- The bare king player counts the moves. If the count exceeds the limit without checkmate, the game is a draw.
- Unlike the 50-move rule in Western chess, the count is NOT reset if the bare king captures a piece.
| Stronger Side’s Material | Move Limit |
|---|---|
| Two or more Rooks (regardless of other pieces) | 8 moves |
| One Rook (regardless of other pieces, no second rook) | 16 moves |
| Two or more Bishops, no Rooks | 22 moves |
| Two or more Knights, no Rooks, no Bishops | 32 moves |
| One Bishop, no Rooks | 44 moves |
| One Knight only (no Rooks, no Bishops) | 64 moves |
| Only Met/promoted pawns (no Rooks, Bishops, or Knights) | 64 moves |
- The Met (Queen) and Bia Ngai (promoted pawns) do not generate a stricter limit because they are weak pieces that struggle to assist in delivering checkmate quickly against a lone king.
- Two Rooks are given only 8 moves because an experienced player can force checkmate in very few moves with this material advantage.
- One Knight alone technically cannot checkmate a lone king (just as in Western chess), hence the maximum 64-move count: the bare king will survive and the game draws.
- When counting, every individual move (both White’s and Black’s) counts as one; so “8 moves” means 8 half-moves total (4 full moves).
10.3 — Comparison: Board’s Honor vs. Pieces’ Honor
| Aspect | Board’s Honor | Pieces’ Honor |
|---|---|---|
| Trigger condition | No unpromoted pawns remain | No unpromoted pawns remain AND weaker side is bare king |
| Who counts | Disadvantaged player | Bare king player |
| Move limit | 64 moves | 8 to 64 moves (based on stronger side’s pieces) |
| Can counting be stopped? | Yes (if player no longer feels disadvantaged) | No |
| Does capture reset count? | No (unless bare king is reached) | No |
| Priority | Lower (activated first) | Higher (overrides Board’s Honor once bare king) |
10.4 — Other Draw Conditions
- Stalemate: The player to move has no legal move but is not in check — draw.
- Threefold Repetition: The same position (same pieces, same side to move, same available moves) occurs three times — either player may claim a draw.
- Mutual Agreement: Both players may agree to a draw at any point during the game.
- Insufficient Material: If neither side has the material to deliver checkmate (e.g., both sides have only their King), the game is a draw.
Informal Rules — Sutras
In addition to the standard rules, Makruk has a tradition of Sutras (สูตร — special opening moves or privileges), which are informal rules used in casual and street play. These Sutras are NOT permitted in official tournaments but are common in friendly games and are part of the rich cultural tradition of Makruk.
Before a game with Sutras begins, both players must agree in advance which Sutras will be in effect. Sutras may only be used in the early phase of the game and only by pieces or kings that have not yet moved.
Sut Khun — King Sutra (สูตรขุน)
Sometimes compared to castling in Western chess. Before the King (Khun) has made any move, it may make a one-time special move: the King leaps to any blank square on the next row in a knight-like fashion (one square orthogonally and then two squares perpendicular, like a horse move). This special move may be made at any point before the King has moved, provided the destination square is empty. Restrictions: The King may not use Sut Khun if it is currently in check. The destination square must be unoccupied. This privilege is lost once the King has moved normally.Sut Met — Queen Sutra (สูตรเม็ด)
The most popular Sutra in informal play. Before the Queen (Met) has moved, the player may make a combined first move: the Met moves two squares forward (along the file, not diagonally), and simultaneously, the pawn that was directly in front of the Met is moved one square forward. Both the Met and the pawn move in the same turn. This gives the Met more initial mobility and can open lines for development, similar to how castling accelerates king safety in Western chess. Restrictions: Both the Met’s destination and the pawn’s destination must be empty. The pawn in front of the Met must not yet have moved. This privilege is lost once the Met has moved normally.Sut Ma — Knight Sutra (สูตรม้า)
Before a Knight (Ma) has moved, the player may make a combined first move: the Knight moves to a destination square, and simultaneously, the pawn that was a knight’s move away from the Knight (i.e., on the square the Knight just vacated or in a coordinate relationship) is repositioned in the same turn. Both the Knight and the pawn move together. Restrictions: Both destination squares must be empty or valid. The pieces involved must not have moved yet. This privilege is lost once the Knight has moved normally.Takhaeng Rua — Rook Exchange Sutra (แตกแถวเรือ)
Used in very informal or casual play, this Sutra allows a player to voluntarily convert one or both of their Rooks (Rua) into a weaker piece type to balance an uneven game. This is purely a handicap arrangement for fun play between players of different skill levels and has no place in competitive play.Strategy and Tips
The Strategic Character of Makruk
Makruk is often described as a game of pure strategy. Because the queen (Met) is so weak and there are no powerful long-range diagonal pieces (the Khon can only step one square), the game does not produce the explosive tactical combinations common in Western chess. Instead, play tends to be more methodical, patient, and positional. As Vladimir Kramnik noted, Makruk resembles an anticipated endgame of Western chess — the game transitions to endgame-like structures much earlier, and players must carefully manage pawn structure, piece coordination, and the counting rules.Opening Principles
- Control the center: As in all chess variants, occupying and controlling the central squares (d4, d5, e4, e5) gives your pieces more mobility and restricts your opponent.
- Develop the Rooks early: The Rooks are the most powerful pieces; getting them active quickly is crucial. Unlike Western chess, there is no castling, so rooks must be developed through normal pawn advances and piece maneuvers.
- Advance pawns carefully: Because pawns start on the third rank and promote at the sixth rank, pawn advances are more consequential and quicker. Think ahead about which pawns to push and which to use as a defensive shield.
- Keep the King safe: Without castling, king safety must be managed manually. Keeping the king sheltered behind pawns and away from the center is important, especially in the early game.
- Knights over Bishops in the opening: The Khon (bishop) is more of a defensive piece due to its limited forward step. Knights (Ma) tend to be more active and flexible in the opening.
Middlegame Strategy
- Rook coordination: Connecting your two rooks on open files is a key strategic goal. Two rooks working together are enormously powerful.
- Pawn structure: Passed pawns (pawns with no opposing pawn blocking or attacking their path to promotion) are very powerful in Makruk because promotion is to rank 6 and happens quickly. A passed pawn on rank 5 is already threatening to promote.
- Promotion strategy: Because promotion always yields a Met (Queen), and the Met is a relatively weak piece, mass promotion can happen. Understanding when to promote and how to use multiple Mets effectively is a key Makruk skill.
- Piece exchanges: In Makruk, trading off the opponent’s pawns while keeping your own is important. Under the counting rules, a side with no pawns but still holding pieces faces strict time limits to deliver checkmate.
Endgame and Counting Rules Strategy
- Pawn preservation: Once all pawns are gone, the Board’s Honor Rule activates. If you are the stronger side, you want to delay pawn elimination as long as possible to delay the counting rule from starting.
- Know the counting table: When the endgame becomes a king and pieces vs. bare king, memorize the counting limits. Two rooks have only 8 moves — this is extremely strict and requires precise play. If you have only one knight, you have 64 moves, but a lone knight cannot checkmate, so that ending is invariably a draw.
- Stopping the count: If you are the disadvantaged side counting Board’s Honor and you suddenly gain a major advantage (e.g., capturing a rook), stop counting immediately — you might then be able to win rather than draw.
- Two rooks are king: With two rooks facing a lone king, deliver checkmate within 8 moves. Practice the two-rook checkmate technique; it requires efficiency with no room for error.
- Knight endgames: A single knight cannot force checkmate against a lone king. If this is the only piece you have left against a bare king, the game will draw when the count reaches 64.
Piece Values (Approximate)
| Piece | Approximate Value | Notes |
|---|---|---|
| Rook (Rua) | 5 pawns | Most powerful piece; dominates open files |
| Knight (Ma) | 3 pawns | Strong mid-range piece; can jump |
| Bishop (Khon) | 2.5–3 pawns | Useful in attack and defense; more valuable than Met |
| Queen / Promoted Pawn (Met / Bia Ngai) | 1.5–2 pawns | Weakest piece; useful in numbers |
| Pawn (Bia) | 1 pawn | Baseline unit; promotion at rank 6 makes them important |
Differences from Western Chess
Players familiar with Western chess should pay special attention to the following key differences:
| Rule or Feature | Western Chess | Makruk |
|---|---|---|
| Board | 8×8 checkered | 8×8 plain (not checkered) |
| Queen movement | Any number of squares diagonally, horizontally, or vertically | One square diagonally only (very weak) |
| Bishop movement | Any number of squares diagonally | One square diagonally OR one square straight forward |
| Pawn starting rank | Rank 2 (for White) | Rank 3 (for White) |
| Pawn double advance | Allowed on first move | Not allowed — always one square |
| En passant | Exists | Does not exist |
| Castling | Exists | Does not exist |
| Pawn promotion rank | Rank 8 (opponent’s back rank) | Rank 6 (opponent’s pawn starting rank) |
| Promotion choice | Any piece except King (underpromotion possible) | Always to Met (Queen equivalent) — no choice |
| King starting position | Kings on same file (e-file), queens on d-file; mirrored setup | Kings on opposite sides (White king left, Black king left from their own perspectives) |
| Stalemate | Draw | Draw |
| 50-move rule | Exists (draw after 50 moves without pawn move or capture) | Does not exist; replaced by Honor Rules (counting rules) |
| Endgame draw conditions | 50-move rule, insufficient material | Board’s Honor Rule (64 moves), Pieces’ Honor Rule (8–64 moves based on material) |
| Strategic character | Mix of tactics and strategy | Highly strategic, slower piece development, endgame-like from early on |
Related Variants
Makruk is part of a family of closely related Southeast Asian chess variants, all descended from the same ancient Indian origins:
Ouk Chatrang / Ouk — Cambodian Chess (Cambodia)
The Cambodian variant is nearly identical to Makruk. The main differences are two special opening moves (similar to the Thai Sutras) that are officially allowed in the Cambodian variant but are no longer part of standard Makruk:- The King may make a knight-like leap on its very first move (if not in check).
- The Queen may move two squares forward on its very first move.
Sittuyin — Burmese Chess (Myanmar)
Sittuyin is the Burmese variant. It shares the same piece types and movements but features a different initial setup: pieces are placed on the board by the players themselves in an opening setup phase, giving each game a unique starting configuration. Sittuyin also has a limited form of pawn promotion.Shatranj (Persia / Medieval Islam)
Shatranj is the Persian ancestor of both Western chess and Makruk. Many Makruk piece movements — particularly the Met (Queen) moving one diagonal step — directly reflect Shatranj’s piece movements. In Shatranj, stalemate was a win rather than a draw; Makruk changed this to a draw.Chaturanga (India)
The earliest known ancestor of all chess variants, originating in India around the 6th century AD. Chaturanga introduced the four military units — infantry (pawns), cavalry (knights), elephants (bishops), and chariots (rooks) — that became the foundation of all chess variants.Quick Reference Summary
Setup at a Glance
- Board: 8×8, plain (not checkered)
- Pawns: Rank 3 (White), Rank 6 (Black)
- Back rank (left to right): Rook – Knight – Bishop – King – Queen – Bishop – Knight – Rook
- Note: White King on d1, Black King on e8 (kings NOT on same file)
- White moves first
Piece Movements at a Glance
- King (Khun): 1 square any direction
- Queen (Met): 1 square diagonally only
- Bishop (Khon): 1 square diagonally OR 1 square straight forward
- Knight (Ma): L-shape (2+1 squares); can jump over pieces
- Rook (Rua): Any distance horizontally or vertically
- Pawn (Bia): 1 square forward; captures 1 square diagonally forward
- Promoted Pawn (Bia Ngai): 1 square diagonally (same as Met)
Key Rules at a Glance
- No castling; no en passant; no double pawn advance
- Promotion at rank 6; always to Met; mandatory
- Stalemate = draw
- Board’s Honor: 64 moves once no unpromoted pawns remain
- Pieces’ Honor: 8–64 moves once one side has bare king (based on stronger side’s material)
Makruk — Thai Chess is a game of deep strategy, patience, and cultural heritage. Whether you are a beginner exploring Asian chess traditions or an experienced player seeking new strategic depth, Makruk offers a uniquely rewarding experience that rewards careful planning and endgame mastery.