Four-handed chess (also known as four-handed chess) is a family of chess variants that are played with four people. The game has a special board, usually consisting of a standard square of 8×8, with 3 rows of 8 cells extending each on each side, and requires two sets of parts of different colors. The rules are similar, but not the same as in normal chess. There are a variety of variations of different rules; However, most variants share a slightly similar map and room configuration. When a player resigns or time is of the essence, his king stays alive and moves randomly. Checkmate a king gives 20 points to the player who delivers the buddy, and if you corner him, each remaining active player gets 10 points. Nor can I resist pointing out that the author of the question says that according to his rules, the paired king will be removed after the movement of this player. This suggests that the player can make a “last dying move”, illegally in the sense that he does not escape control because he cannot. One of the most important variants of 4-player chess is the free game. As you can guess from its name, in this type of game, each of the four players fights alone against the other three. According to D. B. Prichard, four-player chess is “generally understood as a game  played with two sets on a standard board with four expansions, one on each side, usually from 8×3 squares (arguably the best arrangement), but sometimes 8×2 or 8×4 on which the pieces are placed in the normal positions of the board” The movements and captures of the pieces remain the same as in regular chess.
In a desperate situation, a team may abandon the game, which means that a player submits a resignation request and the teammate accepts it. The game ends when three players are defeated. It also ends when there are two players left and one player has more than twenty points more than the other player (because if they were defeated, they would still win) In this case, the main player may need to click on a button that says “Claim win”. This page describes the general rules of four-player chess. It does not cover the shape of the board and the movement of the pieces, as there are many possibilities (see: Four-player chess variants). Here we illustrate the rules on a standard 8×8 chessboard, but these are also valid on all types of boards. FFA is a more recent invention that appears in commercial games, while Teams is historically the game mode. At the same time, four-player chess is not particularly popular. Nevertheless, there are a few commercial versions for personal games. It can also be played online, with the largest website .com chess variants. Finally, how do dead ends work in this game? Are the pieces frozen? Can they wake up later? Does the stuck player have to hang around in case he is brought back to life? A player is in chess if there is another player who, if he were to play next, could catch the king of the first player.
Since allies cannot take each other`s coins, the check can only be given to one player from the other team. Players cannot make a move that has them checked by the moving player, even if the player who could capture the king does not come immediately. During the game, a player is eliminated by taking a step back, being stuck, being defeated or when his time is up. The goal of this variant is to finish the game with more points than your opponents. There are several ways for a player to earn points: I almost agree with @hkBst that you have to determine the beneficiary at the beginning of the paired player`s turn by asking who could actually catch the king (in pre-Persian format). This would certainly lead to a unique result. It is important to note that in standard free games, you cannot communicate with other players to team up. This is prohibited and may result in your banishment. However, another variant of 4-player chess called diplomacy favors this type of “unofficial” coordination. This would allow a paired player, under certain circumstances, to choose which of the opponents would inherit all the pieces. In a multiplayer game like Diplomacy, choosing which attacker will be the beneficiary is a very real threat that can prevent attacks and keep small broods alive.
This is perhaps the most appropriate example possible of chess saying that the threat is more powerful than its execution, as this can only be triggered when the player has permanently lost. Since 4-player chess games can be adapted in many ways, there are also many variants that can be created by combining different sets of rules. The most common variants are solo and diplomacy, but you can also play 4 Chess960 players, 4 King of the Hill players, 4 3 Check players and others. The game can also end when a player runs out of time or resigns. In this case, the other team wins the game. Here is the wiki of the 4-player chess version chess.com: 4pc.fandom.com/f The rules for regular chess apply mainly to these games, as well as additional rules specific to each variant. In 4-player chess, free-for-all and teams are the two main variants. Players can also customize the rules to add even more flavor to their games. According to these rules, the mere accumulation of control while he was already a checkmate would not cause a checkmate. The game is played with four players, each with their own characters. Players are hereinafter referred to as red, blue, yellow and green, depending on the color of their respective miniatures games.
Red is the first player and always takes the first step. Therefore, the default orientation of the map is from the point of view of red, that is, red is displayed at the bottom. The second player is Blue, who sits on Red`s left side. Yellow is the third player and is across from Red. The last player is green and is on the right side of the red, in opposite blue. The game continues clockwise, i.e. red, followed by blue, followed by yellow, followed by green and then red again, etc. Players move in the following order: yellow, green, red and blue, then yellow again, and this order repeats. This means that both teams take turns. It is important that the checkmate is only performed when the checkmate player needs to move.
Here it seems that the yellow checkmate is blue. But the game does not stop there, because yellow is not followed by blue, but green. Green can check red with the checker (green is able to do this because green is not failing). The next player is Red, who is defeated and loses the game. The fact that blue is also defeated does not count, because blue has not yet been on the corner. As indicated by the teams in the name, this variant differs in the game of Free-For-All. Teams consist of two players each, who are always separated from each other at all levels. Players cannot capture their teammate`s characters. When a player is defeated, all his pieces turn gray.
When this happens, they cannot move and do not give points to a player. A player is immediately defeated; In other words, they don`t have to wait for their opponents to move to be defeated. In four-player chess, each player moves pieces of different colors. On this page, these four colors are yellow, green, red and blue. If players do not want to earn points in the FFA, they can also play against the first person who was defeated or against the last person standing. You can also, instead of playing for checkmate, make a player have to capture the king instead, just like any other room. These are the most important rules adopted by the four-handed chess club. This is quoted a bit in the 1893 book “Four Chess”, in which the rules are listed.  4 Player Chess is a family of chess variants played by four people simultaneously and on the same board.
Four-player chess is played on an 8×8 board, which is extended by three rows of eight squares on each side. In other words, it is a 14×14 card with 3×3 corners removed. The table has 14 files, to which the letters a to n are assigned, and 14 rows, numbered from 1 to 14. The game is played with four regular sets of chess pieces, each with a different color. The colors used in this book are red, blue, yellow, and green. Since team play is crucial in this variant, players must communicate with their partner to gain an advantage. Chess.com allows you to easily share your ideas with a teammate by drawing arrows on the board. In-game chat also allows you to send private messages on a team channel, so opposing players don`t know what you`re planning. Teammates (allies) can`t conquer each other`s characters (just like a player can`t catch their own characters). Instead of playing against each other, their goal is to play together against the other team. In four-player chess, allies win or lose together, as a team. In teams, table conversations in the past are not allowed in the personal game.
Players can play until one player is defeated, or they can make both teammates have to be defeated. The earliest known mention of a four-player chess game is a pamphlet by Dessau, Germany, in 1784.  Four-handed chess, as it was called, gained popularity during the 19th century, with variations of the game appearing in Germany, Britain, Russia, and the United States, among others.  Many different pamphlets emerged, with minor rule changes, such as where the king and queen were or how to deal with the peasants who met.  Yellow verified the blue king. If Blue was the next player, it would be a checkmate. However, the next player after the yellow is green, which can interpose the bishop. If green does this, then after red comes blue, which is not in check but cannot make a valid move, so that the game ends in a deadlock draw (1/2-1/2).