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===INTRODUCTION===
Hex is a strategy game invented by Piet Hein in Denmark in 1942, and later rediscovered and popularized by John Nash. It has simple rules, yet offers a surprising amount of strategic depth. The game can't end in a tie, and when playing without the swap rule, the first player is known to have a theoretical winning strategy, although it is not known what that strategy is.
The Hex game is a connection game independently invented by two mathematicians, Piet Hein and John Nash, respectively in 1942 and 1947. The interest of the game mainly lies on the contrast between the simplicity of its rules and the potential complexity of its strategy. Another interesting aspect is that the game can't end in a tie.


== Rules ==


===GOAL===
=== Goal ===
The goal for each player is to create a connected path of his tokens linking his two opposite sides of the board (of his color).


The board has two red edges and two blue edges. The goal for each player is to connect their two edges with stones of their color.


===OPENING===
=== Turns ===
The first player places a first token on any cell of the board. The second player has then the choice between:
*continue playing his current color (and thus place a second token anywhere on the board);
*or decide to switch colors and keep the first move for him. In this case the first player places another token with his new color.


Players take turns placing a stone of their own color on the board, with Red going first. Stones can be placed on any empty cell and once placed, they are never moved or removed.


===TURNS===
=== The swap rule ===
After the first two moves (see OPENING), each player plays a token of his color on his turn. A token can be placed on any free cell of the board.


To balance the game, the swap rule is used. After the first player opens with a red stone, the second player has the option to "swap," or steal the opponent's first move. In this case, Red's initial stone is replaced by a blue stone and mirrored about the long diagonal. After this, it is Red's turn.


===GAME ENDS===
=== Game end ===
The game ends when one of the players has built a complete path with his tokens between his two sides of the board. The game can't end in a tie.


The game ends when one of the players has connected their edges with a path of stones of their color. When it is clear to both players who will win, it is customary for the losing player to resign.


===VARIANTS===
== Game options and interface ==
The game can be played on several different board sizes. The 6x6 board is designed to help beginners to understand the basic rules and discover simple game patterns. The 11x11 board is a more classic size. The 14x14 board is the one recommended by John Nash, one of the game inventor, and the 15x15 allowed longer plays.
 
=== Board size ===
 
The game can be played on boards of different sizes. The 6x6 board is designed for beginners, the 11x11 board is a classic size, and the 12x12, 13x13, 14x14, and 15x15 boards are larger options for more experienced players. The 6x6 board size is only available in training mode.
 
=== Making moves and swapping ===
 
To make a move, click on an empty cell. To guard against accidental misclicks, you must confirm each move by clicking on the stone a second time, or by using the "confirm" or "cancel" buttons above the play area. On the second move of the game, you have the option to swap. To do so, click on the "swap" button above the play area. If you do not want to swap, simply make a normal move.
 
=== Resigning and passing ===
 
Players can resign at any time, whether or not it is their turn. The resign button is found in the "additional game controls" menu, which is marked by three dots "..." in the upper right corner of the play area. Passing is rarely done in Hex, as it never benefits a player. However, the option to pass is found in the "additional game controls" menu, which is marked by three dots "..." in the upper right corner of the play area. Three passes in a row are not permitted, so if both players have passed, the next player must make a proper move.
 
=== Accessibility ===
 
The default shades of red and blue used in Hex can be difficult to distinguish for colorblind people. To compensate for this, there is a game display option for color blindness in the Options menu below the game board.

Latest revision as of 03:20, 24 January 2023

Hex is a strategy game invented by Piet Hein in Denmark in 1942, and later rediscovered and popularized by John Nash. It has simple rules, yet offers a surprising amount of strategic depth. The game can't end in a tie, and when playing without the swap rule, the first player is known to have a theoretical winning strategy, although it is not known what that strategy is.

Rules

Goal

The board has two red edges and two blue edges. The goal for each player is to connect their two edges with stones of their color.

Turns

Players take turns placing a stone of their own color on the board, with Red going first. Stones can be placed on any empty cell and once placed, they are never moved or removed.

The swap rule

To balance the game, the swap rule is used. After the first player opens with a red stone, the second player has the option to "swap," or steal the opponent's first move. In this case, Red's initial stone is replaced by a blue stone and mirrored about the long diagonal. After this, it is Red's turn.

Game end

The game ends when one of the players has connected their edges with a path of stones of their color. When it is clear to both players who will win, it is customary for the losing player to resign.

Game options and interface

Board size

The game can be played on boards of different sizes. The 6x6 board is designed for beginners, the 11x11 board is a classic size, and the 12x12, 13x13, 14x14, and 15x15 boards are larger options for more experienced players. The 6x6 board size is only available in training mode.

Making moves and swapping

To make a move, click on an empty cell. To guard against accidental misclicks, you must confirm each move by clicking on the stone a second time, or by using the "confirm" or "cancel" buttons above the play area. On the second move of the game, you have the option to swap. To do so, click on the "swap" button above the play area. If you do not want to swap, simply make a normal move.

Resigning and passing

Players can resign at any time, whether or not it is their turn. The resign button is found in the "additional game controls" menu, which is marked by three dots "..." in the upper right corner of the play area. Passing is rarely done in Hex, as it never benefits a player. However, the option to pass is found in the "additional game controls" menu, which is marked by three dots "..." in the upper right corner of the play area. Three passes in a row are not permitted, so if both players have passed, the next player must make a proper move.

Accessibility

The default shades of red and blue used in Hex can be difficult to distinguish for colorblind people. To compensate for this, there is a game display option for color blindness in the Options menu below the game board.