Board game reversi quadrature rules. Rules of the game. Top button panel

The game of reversi (from English to reverse - to reverse) is popular in many countries. In the USA it came in second place after chess, and in Japan - after Go. Various tournaments and matches are held, including world championships. The game attracts with its simplicity of rules - they are simpler than chess and checkers - and amazing dynamism. The situation on the board changes instantly, and all the player's conquests in one turn can go to the enemy.

Reversi have been known since time immemorial, and in the early 70s of the 20th century they were rediscovered by the Japanese Hasedzhawa. The insidious traps and unforeseen situations that characterize the game evoked an association in him with Shakespeare's Othello. and as a result of the reversi they received another name - “Othello”.

The attributes of the game are an 8x8 board and 64 chips (32 for each player), painted white on one side and black on the other. You can take an ordinary chessboard; the coloring of its fields does not matter. Chips can be made by gluing regular white and black checkers to each other or painting 64 identical buttons in two colors.

Let's describe the rules of the game in reverse. The player playing white places his chips with the white side up, and the player playing black puts his chips on the black side. First of all, the partners place two of their pieces in the center of the board, as shown in Figure 1 (in reversi, unlike chess, the horizontal lines of the board are numbered from top to bottom).

Black makes the first move (as in Go and Renju, but unlike chess and checkers). Opponents take turns placing one of their chips on the free fields of the board, next to one of the opponent’s chips and so that, together with some of their chips, they border (surround) one or more opponent’s chips horizontally, vertically or diagonally (or along several lines straightaway). In other words, a piece is placed on the same line with another piece of the same color already on the board, and there must be a row of opponent's pieces between them, and there are no empty squares. The chips surrounded on both sides are captured, but are not removed from the board, but are turned over to the other side, changing their color. If encirclement occurs simultaneously along several lines, then all chains of captured tiles are turned over. So, any piece, once on the board, remains on it until the end of the game, although it can be turned over as many times as desired.

To illustrate, consider the symmetrical position in Figure 2. Now it is Black's move, and by placing a chip on the corner square a8, they immediately surround 18 white chips in three possible directions. The vertical “a” chips, from a2 to a7, are surrounded by a1 and a8 chips, the last horizontal chips, from u8 to g8, are surrounded by a8 and h8 chips, and finally, the large diagonal chips, from b7 to g2, are a8 and h1 chips. This example is a record - the largest number of chips that can be captured and turned over in one move is 18.

If at some point one of the players cannot make a move (not being able to surround any enemy pieces), then he misses it.

If one of the players has used all his chips, then he can take a chip from the opponent's supply. However, in the set of games, both white and black have two additional chips, and this, as a rule, is enough to get by with your own chips.

In reversi, the moves of both sides are counted not in pairs, as in chess, but separately (in rare cases, odd numbers correspond to black moves, even numbers correspond to white moves). Before the game starts, four squares of the board are already occupied, and therefore it lasts no more than 60 moves. The game ends when none of the partners is able to make the next move, in particular, if all 64 fields of the board are already filled with chips. The winner is the one whose chips are currently on the board more, and if there is a tie, there is a draw (of course, the “visible” side of the chips on the board is taken into account).

Returning to Figure 2, we note that Black's move a8 was the last in the game - the entire board is filled with chips. Having turned over the record number
Lo chips - 18, Black miraculously escaped - the game ended in a draw -32:32!

Let us now consider, as an example, ten moves of the game in reversi (five on each side).

s5. Black has surrounded the white chip d5 with his c5 and e5 chips, and it turns over with its black side up (for simplicity, we will say it changes color).
s6. Now flips over and becomes the white d5 piece.
d6. The d6 chip turns black again.
e6. The d6 and e5 pieces are surrounded, both turn over and become white.
f6. The e5 chip changes color from white to black.
s4. The c5, d4 and d5 chips are white.
b6. A row of chips - c6, d6, e6 - is turned over and they all become black.
e7. Chips d6. e5 and e6 are white.
f8. The d5 and e4 chips are black.
e3. The e4 chip is white.

A position arose as shown in Figure 3. White, who has more chips, has the initiative. But it’s too early to rejoice: situations in reversi change, like in a kaleidoscope, chameleon chips are “repainted” every now and then, and it’s important what they will be like at the end of the game.

In most games, for example in chess and checkers, material superiority usually determines the overall advantage, and in reversi a player who has a significantly larger number of chips of his color can lose all his conquests in one move (see, for example, Fig. 2).

Obviously, if at some point one of the players has all his chips “eaten”, the game immediately ends in his defeat. The shortest duel with such an ending (“childish checkmate” for reversi) consists of nine moves:

and there were only black chips left on the board. The game ended in their victory with a score of 13:0.

Let's look at some basic principles of the game. Since enemy pieces located in the center of the board are easier to capture than on the edge, you should always strive to occupy the extreme fields of the board and prevent the enemy from doing so. Capturing corner fields is especially beneficial. Chips that fall on them can never be turned over (there is simply nothing to capture them) and retain their original color until the end of the game. The one who breaks into one of the corners of the board receives a serious advantage, and if this happens at the beginning of the game, then a decisive one. Therefore, by the way, it is very dangerous to place your chips next to the corner squares, especially on b2, b7, g2, g7; the opponent can carry out a simple combination and take the corner. Here is a striking example illustrating the power of corner chips (Fig. 4).

As if it’s time for White to give up - they have only one chip against the opponent’s 53 chips! Nevertheless, they easily gain the upper hand, and even with a “dry” score! Here is a spectacular ending to this game.

a2. With his move, Black would still be forced to miss it. Now the entire vertical “a” has become white (except for field a1 for now). Black still has no moves, as he won't until the end of the game.
h8. The last horizontal line is painted white.

So, the entire board is filled with white chips, 64:0!

In the opening, experienced players fight in the center of the board - in the square сЗ - с6 - f6 - f3, trying not to let the opponent's pieces reach the edge of the board for as long as possible. Then the white and black pieces occupy the edge of the board one after another, and you have to be careful not to let the enemy pieces go into the corner. Towards the end of the game, there are fewer options, and skilled players calculate them almost to the end. Now giving corners is no longer so dangerous.

It is worth saying that the game of reversi attracts a lot of attention from fans of computer games; many programs have been created that are worthy of competing with humans. In 1989, at the first Computer Olympics in London, it was the reversi tournament that brought together the largest number of programs from different countries - 15.
Let us now present, for illustration, one interesting game in reversi between a human (black) and a computer (white). For convenience, move numbers are placed directly on the board margins.

Figure 5, a shows the first 16 moves, and the color of the chips only shows who exactly - white or black - made the move with a given number. The result is the position that you see in Figure 5, b (to verify this, you need, of course, to play the game on the board).

First, the players occupied the entire center of the board (12 moves, 4x4 square), and then moved to its edge (black on the 15th move and white on the 16th move). At this point the debut of the game can be considered complete. The middle game of the game, moves 17-42 can be traced in Figure 6. Here the color of the numbered chips also corresponds to the sequence of moves, and the color of the unnumbered chips is kept the same as in Figure 5, b.

More and more pieces appear on the edges of the board, but the opponents still do not allow each other to approach its corners. The position after 42 moves is shown in Figure 7, a (numbers have been removed from all chips already placed on the board).

The initiative now belongs to the computer (25:21), but in the endgame the human managed to create a decisive attack (moves 43-60). To do this, he resorted to a trick - he gave up the lower left corner (the machine occupied it with moves 46), but with moves 47, 49 he penetrated into the adjacent right corner and won significant space in the lower part of the board. The chances were equalized, but on move 50 the computer made a mistake, and Black captured another corner, the upper right one. After their 53rd move, White is unable to place a new piece on the board and is forced to skip a move, followed by a second one (that’s why the pieces numbered 53, 54 and 55 in Figure 7 are colored black). After a few moves, the game ended with Black’s victory with a minimal advantage of 33:31 (Fig. 7, b).

Let's look at some of the strategic principles of the game. In the middlegame, a player should create situations on the board such that squares arise that he can take, but his opponent cannot. Four main cases with a possible White move on the edge of the board - A, B, C, D - are shown in Figure 8.

If there is a second supporting piece in the center of the board (the central fields are shaded in the figure), White can always place a piece on one of these fields; for black they are inaccessible in any position in the center. Obviously, the presence of such “reserve” squares for one of the sides, in this case White, is very important; in chess terms, this allows you to win the tempo.

It should not be assumed that the most important thing in reversi is the distant calculation of options. Often situations arise in which the struggle is local in nature, only a certain part of the board is affected. Consider Figure 9.

White played the opening poorly, and Black, placing a chip on square A, gets a reserve square. They do not occupy square B for as long as possible, and if at some point White takes it, then Black will have a new square D, which he can go to, but the enemy cannot.

Let us now assume that Black occupied square B on the first move. In response to this mistake, White can carry out a simple combination. White - A, black - G, white - B, and now it's Black's move (we are not interested in the location of the chips in the upper half of the board now, but it is assumed that there is a white chip on b4). Since occupying the g7 square is suicide, Black is forced to switch to another part of the board.

To understand the idea of White's combinational maneuver, we should look at some general principles of the game. In any situation on the board, a player has many bad moves and many neutral ones. The opponent's goal is to force him to use all neutral moves and eventually make a bad one. The standard technique is to transfer the turn order. The local situation is played out so that in the end it is the enemy's move. This technique is used in the operation in Figure 9. After black’s inaccuracy and the partner’s correct actions, they are forced to walk outside the lower right corner.

Knowing the standard positions on the edges (Fig. 8) - what to strive for and what to avoid, you can already predict the outcome of the game around the 30th move. Precise play of the “side” of the board is, as it were, an analogue of positional play in chess. Creating a reserve square can be compared to owning an open line or creating a passed pawn... Of course, in reversi, as in chess, a positional advantage, and especially a material one (its role here is small), does not guarantee victory, although it increases its probability.

Other strategic principles have been developed that are applicable in certain provisions.

As in any game, there are interesting tasks and combinations in reversi. Let us present one unique problem (in chess language - an etude), proposed by one of the authors O. Stepanov. In Figure 10, White starts and wins.
This pearl is solved by 1. e2! Let's see how events develop further. The black chips d3 and e3 - e5 are flipped over, and only the d4 and d5 chips remain “alive”. How to play black now? After the move d2 or d7 and, accordingly, the answer d1 or d8, as we see, only white chips remain on the board - the game is over. In the case of one of the moves b7, b5, b4, b3, f2, f4, f5, f7 and the corresponding response a8, a5, a4, a2, g1, g4, g5, g8, Black is left with one single chip, which is surrounded in all directions , and with the next move White ends the game with the complete destruction of the enemy forces.

So, Black has a forced response g7, giving up the corner of the board. White plays, for example, f5 (a white chip appears on e5) with the inevitable h8. As a result, the lower right corner is won, which at such an early stage of the game is tantamount to victory.

It is possible that this is the only position (up to symmetry) with such a small and approximately equal material, about which one can say that one of the sides starts and wins!

The game uses a square board measuring 8 × 8 cells (all cells can be the same color) and 64 special pieces, painted on different sides in contrasting colors, for example, white and black. At the beginning of the game, 4 chips are placed in the center of the board: black on d5 and e4, white on d4 and e5. Black makes the first move. Then the players take turns. When making a move, a player must place his chip on one of the squares of the board in such a way that between this placed chip and one of the chips of his color already on the board there is a continuous row of opponent’s chips, horizontal, vertical or diagonal (in other words, so that a continuous row of chips the opponent was “closed” by the player’s pieces on both sides). All opponent’s chips included in the “closed” row on this move are turned over to the other side (change color) and go to the player who moved. If, as a result of one move, more than one row of enemy chips is “closed” at the same time, then all the chips that are on all “closed” rows are turned over. The player has the right to choose any of the moves possible for him. If a player has possible moves, he cannot refuse a move. If a player does not have valid moves, then the move is transferred to the opponent. The player has the right to choose any of the moves possible for him. If a player has possible moves, he cannot refuse a move. If a player has no valid moves, then the move is passed to the opponent. The game ends when all the chips are on the board or when neither player can make a move. At the end of the game, the chips of each color are counted, and the player with the most chips on the board is declared the winner. If the number of chips is equal, a draw is considered.

Strategy Basics

Reversi is a strategic game similar to checkers and chess. Just like in chess, it is customary to divide the game into three parts: opening (beginning), middlegame (middle of the game) and endgame (ending). However, unlike chess, the number of possible openings is much smaller, and all of them are easy to remember. All any serious players know the openings 5-6 moves ahead in order to avoid obviously losing moves at this stage. The middlegame is perhaps the most “free” and at the same time difficult part of the game, when the position can either be strengthened or changed in your favor. Despite this, many seemingly lost games in the middlegame acquire new qualities when entering the final stage of the game - the endgame. The golden rule of endings is to take your time and count. It is customary to count chips that result in the final outcome of the game for a specific tactic. Naturally, the number of outcomes depends on which move to start counting from, and this is why computers play much better than people - they can afford to calculate all possible options (by computer standards, there are few of them) and always choose the one that minimizes the human result and computer points are maximized. There are quite a few different strategies for playing reversi, and the choice is determined by the level of training and inclinations of the player. The simplest game for beginners may be to capture the corner squares of the board, which subsequently cannot be “repainted” in a different color, and sequentially occupy the board from the corners. A more advanced tactic is to limit the enemy’s possible moves: a position is created in which the enemy only has moves that suit the player, and the game takes place in a direction that is convenient for the player. As a rule, most Japanese masters are distinguished by precisely this, honed to perfection, tactics. An even more advanced tactic is the “tempo” tactic, which can be characterized by the rule “take away the enemy’s most profitable moves and make them your own.” This strategy, however, requires an extremely strong “sense of position.” Yet, despite the existence of developed strategic principles, the most important part of success is experience. Only experience gives stability, with which comes a feeling of understanding the game and its subtleties. You can learn more about the strategy and tactics of the game in Brian Rose’s book “Othello: A Minute to Learn... A Lifetime to Improve.”

Reversi or Othello?

While the game set, rules, balance and etiquette are generally identical, Reversi and Othello are slightly different. These differences are:
- Reversi board is usually white or red-brown. The modern board for Othello is most often green (a reference either to a grass court or to the green cloth common to card tables and billiards), while it contains the “star” points traditional for oriental games; they do not carry any gaming load, they simply delimit the space of the board visually and make orientation easier.
- In reversi, players had a strictly fixed supply of chips - 30 pieces each, and if someone ran out of chips, he could not borrow them from his opponent; in Othello this is not only possible, but also obligatory, that is, by and large, the features in Othello are common.
- In reversi, you were allowed to place a chip near your chips, without turning them over; This is not allowed in Othello.
- According to the reversi rules of 1876, the game began with an empty board - the opponents made the first two moves to the central four squares in any order without turning over (that is, two starting positions are possible). In Othello, the initial arrangement is fixed: the four central cells are filled with pieces in a checkerboard pattern (black on d5 and e4, white on d4 and e5).
- Finally, in Reversi the first move is made by white, in Othello - by black.
In recent decades there has been a continuous struggle between the commercial trademark "Othello" and the old, loose name "reversi". How it will end is unclear. The name “Othello”, under which the game experienced its renaissance, is definitely worthy of mention, but the name “reversi” fits the mechanics of the game much better and does not evoke unnecessary associations and literary analogies. By the way, all international tournaments are held according to Othello’s rules. The notation in both games is chess, alphanumeric. The game record is similar to the game record in Go: it is a diagram depicting the playing field (Japanese “kifu”), on which moves are marked with circles of two colors with continuous numbering.

Reversi and computers

Computer version of Reversi - “Iagno” from the GNOME Games set of games. Currently, many computer programs have been released for playing Reversi, including for playing online. For a computer, this game is quite simple, and good programs can easily beat even human champions. This quality is achieved at this stage of technology development by the alpha-beta cutting algorithm, using a large database of already completed batches. In 1997, the Logistello Program beat world champion Takeshi Murakami 6:0. There are about 1028 positions in the game and about 1058 possible games. Reversi options

Reversi n × n

Game on a field of n × n cells. It differs from the 8 × 8 game in that chips of the same color are not placed in a checkerboard pattern at the beginning of the game, but side by side. There are reversi options with a field size of 10 × 10 and larger. They do not differ from ordinary ones in anything except the size of the field. In general, options smaller than 8 × 8 are not interesting because they are deterministic and with an ideal strategy the second player (the one who goes second) always wins.

Eight-star Othello

There is also a variant called "Othello 8Stars" (pictured), the board of which is a 10x10 square with three reduced squares in each corner. The rules are basically the same as in Othello and Grand Othello, but the tactics change quite a bit, since the number of corner pieces (which in reversi are basically impossible to capture and reverse) is increased from four to eight (where the name actually comes from).

The game was invented in 1880 in Great Britain. Immediately after its invention, people became interested in the game everywhere, they wrote about it in newspapers and published books, but by the end of the 19th century they began to forget about it. Soon the game was completely forgotten, until in 1971 the game was brought back to life by the Japanese Goro Hosezawa, but under a different name - Othello. Now the official name of the game is Othello, only in Russia it is called Reversi in the old fashioned way.

Now there are international associations dedicated to this game, annual world championships are held, and many computer and tabletop versions of the game have been released.
In terms of popularity, in America the game Othello ranks second after chess, and in Japan - after Go.

Game rules for 2 players

To play you need: A playing field of 8x8 cells, 64 chips painted on both sides in different colors.

The goal of the game is to capture the maximum area of the playing field with your chips, covering and turning over the opponent’s chips.

Chips colored on both sides are divided between players. Everyone plays with their own color throughout the game, that is, they place a chip on the field with its color on top.

At the beginning of the game, each player places his two pieces in the center of the field, usually diagonally.

Having determined the order, the players take turns placing their chips on the field, but in such a way that between the new chip placed and one of the chips of the same color already on the board, there is either one or a continuous row of opponent’s chips (horizontal, vertical or diagonal). That is, in other words, the player must cover a row of opponent’s pieces on both sides with his own pieces. After this move, all the opponent's pieces in the closed row are turned over to the other side and go to the player who moved.

If a player manages to close several rows at once (fork), then the opponent’s chips are turned over accordingly, also in two rows. Idling is not allowed in the game. With each move, you need to surround at least one opponent’s piece, but if there is no such situation on the field, the player misses the move.

The game ends when all the pieces are on the board. After counting the chips, the winner is declared the player who has the most chips on the field. If the number of chips is the same, a draw is declared.

You can try the game online for free before purchasing the game or before making it yourself.

It's time to play Reversi online - the best version of the game with rules in Russian is available for free! You can study in the game “Reversi” against the computer, and when you are ready to play with a real person, call a friend and organize an online championship without registration!

The game "Reversi" is an online clone of the board strategy game of the same name for two players. You may know Reversi as the game Othello. These are just two different names for the same game. Its essence is a reverse confrontation between white and black chips on a territory of 64 cells arranged 8x8. Each player starts with 2 discs of his own color, but can increase the number, gradually capturing the enemy's territory.

The modern online game "Reversi" is based on the rules of the board puzzle Reversi, invented by two Englishmen in 1883. Each accused the other of fraud. Meanwhile, the toy became very famous even without an established authorship. One day, an enterprising Japanese slightly adjusted the rules of “Reversi” and patented a new name for the game - “Othello”.

Initially, Reversi did not have a specific starting position, but according to the rules of Othello, the action begins with four checkers placed in the middle of an 8 by 8 grid. Over time, the historical game "Reversi" adopted the innovations of "Othello" and is now known with a double name.

Extended rules of the game "Reversi"

Black goes first, if you play Reversi for two against the computer, the move is yours.
The goal of the game is to occupy as many enemy tiles as possible while blocking your tiles from being captured.
To occupy a tile with your color, you need to trap it, blocking the passage between your two tiles, horizontally, vertically or diagonally.
The captured area is painted in the winner's color, but can be recaptured if there is enough space.
The game continues as long as movement is possible.
The one who captures the most chips wins.

How to play Reversi

Using the mouse, place your pieces near your opponent's pieces to capture the space located between you. Consider the following when planning your strategy for playing Reversi:

try to end your move in a corner position, this will protect the chips of your color by blocking the opponent’s moves;
force your opponent to make a bad move by playing on the edges - calculate the path so that your color ends up on the edge.

The simplicity of the online game “Reversi” is deceptive, but if you know the rules and basic tricks, you will definitely find winning moves and be able to win! Are you ready to test your strength? Have a good game!

Reversi (Othello)
Board strategy game. There are two versions of the rules, depending on which the game can be played by two people or one.

Now there are international associations dedicated to this game, annual world championships are held, and many computer and tabletop versions of the game have been released.
In terms of popularity, the game of Othello ranks second after chess in America, and after Go in Japan.

Game rules for 2 players

To play you need: A playing field of 8x8 cells, 64 chips painted on both sides in different colors.

The goal of the game is to capture the maximum area of the playing field with your chips, covering and turning over the opponent’s chips.

Chips colored on both sides are divided between players. Everyone plays with their own color throughout the game, that is, they place a chip on the field with its color on top.

At the beginning of the game, each player places his two pieces in the center of the field, usually diagonally.

Having determined the order, the players take turns placing their chips on the field, but in such a way that between the new chip placed and one of the chips of the same color already on the board, there is either one or a continuous row of opponent’s chips (horizontal, vertical or diagonal). That is, in other words, the player must cover a row of opponent’s pieces on both sides with his own pieces. After this move, all the opponent's pieces in the closed row are turned over to the other side and go to the player who moved.

If a player manages to close several rows at once (fork), then the opponent’s chips are turned over accordingly, also in two rows. Idling is not allowed in the game. With each move, you need to surround at least one opponent’s piece, but if there is no such situation on the field, the player misses the move.

The game ends when all the pieces are on the board. After counting the chips, the winner is declared the player who has the most chips on the field. If the number of chips is the same, a draw is declared.

You can try the game online for free before purchasing the game or before making it yourself.
Reversi. Online

Reversi. Playing field

Single-color playing field 8x8 cells. To enlarge, click on the picture.
You can use a regular chessboard (print). or simply draw the playing field with lines on paper, since the color of the field is not important for the game.

Colored children's playing field (8x8) - to enlarge, click on the picture.
We cut out multi-colored chips from cardboard.