What does half eye mean in Go? How do you calculate it?

Strictly speaking, the zi is the goal, which is equivalent. So why did the concept of "half-eyed" appear?

There are two common possibilities:

1.Stickers caused. Because Black goes first, and the advantage of the first side is absolute, so, for the sake of fairness, Black has to return a number of white squares (which is different from Japan and South Korea in China, which are six and a half eyes and seven and a half eyes respectively), for example, one side has ten more eyes on the board, but if six and a half eyes are pasted back, there is a fraction with half eyes.

Because a draw is rare in Go, the fraction of the half-goal is very frequent in the outcome of the win.

2.Sub-effect caused. The simplest example is to win a single robbery and use two moves to win a single eye, then in terms of sub-effect, each move is the value of half a goal.

As for one son, two eyes, this concept is because the method of calculating victory and defeat is different. The number method calculates the victory and defeat, which is the deviation between the calculation and the standard; In the number method, the difference between the two sides is calculated. The simplest analogy:

Three apples, let's divide them. You take two, I take one. In this case, in the method of counting, it is considered that you (more than the standard of 1 and a half per person) take half more, that is, win half a child; In the method of numbers, if you think that you (than me) take 1 more, you will win one eye.

Therefore, it gives people the misunderstanding of "one son and two eyes", but in fact, children and goals are concepts of equal value.

Derived from the Japanese rules of Go, the Japanese rules of the flounder method (South Korea is also this rule), in order to avoid the occurrence of a draw, it is specially stipulated that the first move Black must return 6 and a half meshes to White (South Korea 7 and a half meshes). This kind of artificial rule makes the existence of "half-eyed" victory and defeat in Go.

Therefore, when calculating the victory or defeat of both sides, White adds the number of eyes to the number of eyes (6 and a half meshes, 7 and a half meshes) compared to Black, who has more and whoever wins. If one side happens to have more than half an eye than the other, then one side is said to be "half an eye wins".

Generally speaking, one son has two eyes, so half eyes are a quarter of a child.

Accurate to a quarter, i.e. a hemisphere.

The value of the two sides is half a eye.

There are two types of Go point algorithms: the number method and the counting method.

1. Counting (Comparison) Method: Expressing it in simple words, it is to calculate and compare the number of regional meshes enclosed by the two sides in the final game, and judge the outcome by the number of meshes. In China, the rules of Go are based on the number method.

2. The number method is calculated and judged according to the number of positions belonging to the chess pieces on the chessboard after the end of the chess game.

Since the counting method only counts the number of regional meshes encircled, whether or not the single official is collected does not affect the result of winning or losing, so it stipulates that the final game of the chess game does not accept the single official. Therefore, whether or not all the single officials are collected is the main difference between the number method and the counting method in the final game.

According to Chinese rules, the total number of the two types of points on both sides should be calculated, that is, the number; According to the rules of Japan and South Korea, that is, the number, you only need to calculate the second point above. Because the basic principle of Go is that both sides take turns.

That is, from the beginning to the endgame, the first point - the point occupied by both pieces, plus the dead piece has already filled his own empty space (which happened during the endgame), the total number is the same. The third type, since neither side can occupy it, it is not counted by everyone.

Professional Go actual combat, chess game appreciation, more eyes and less (explanation).

There are 361 intersections on the board, and the rules of Go are that both sides take turns to land at this intersection to grab as many territories as possible. When neither side can occupy any longer, the endgame is confirmed. After lifting the dead son on the chessboard, fill it back into the air.

At this time, there are several cases of dots on the board:

1.Occupied by living sons on both sides.

2.There is no need to be able to confirm that it has been occupied by one of the parties.

3.Neither side can occupy it, appearing in the case of Double-Active.

The first point above is called "sub"; The second type of point is a point that can be identified as a certain area without having to be identified, and it is called "me". In Chinese rules, the sub-headings are empty; Japan and South Korea omitted this part.

Finally, it should be noted that the method of calculating the victory and defeat is different, which is manifested in a specific game of chess, for example, winning 3 4 discs is the same as winning 1 and a half eyes, that is, winning n discs = winning 2n goals. This is because the number method calculates the winner and loser, which is the deviation of the calculation from the standard; In the number method, the difference between the two sides is calculated.

Go uses a square checkered chessboard and black and white round chess pieces to play the game, and the chessboard is divided into 361 intersection points with 19 vertical and horizontal line segments, and the chess pieces walk on the intersection points, and the two sides alternately move the chess, and cannot move after the pieces fall, and the one with more enclosures wins. Because Black took advantage of the first move, it was artificially stipulated that Black should give White a post at the end of the game.

In ancient China, black and white placed two discs at the diagonal star position (diagonal star layout), which was a seat system, with white taking the lead. The modern game of Go was developed from Japan, and the rule of the seat was abolished, and black came before white, making the changes of Go more complex and changeable. Go is also considered the most complex board game in the world.

Determine the winner and lose. There are three rules of Go. Chinese mainland adopts the number rule, Taiwan adopts the Ying point rule, and Japan and South Korea use the number rule. Because Black has a certain advantage in going first, all rules use the sticker system.

Chinese rules. 1. The rules of sticking 3 and 3 4 sons: the first step is to remove the dead son.

The second step is to count only the number of points around one side and record them (generally the points are in units of ten points). In the third step, if the number is black, subtract 3 and 3 4 discs, and if the count is white, add 3 and 3 4 discs.

In the fourth step, the result is compared with 180 and 1 2 (half of the 361 points on the board), and if it is exceeded, it will be considered a victory, otherwise it will be a loss. The number of black eyes is more than the number of subs, while the number of white meshes only needs to exceed the subs to win. In layman's terms, 177 pieces of white pieces win, and black pieces win.

2. Let the first and let the son: let the first do not stick the eye, let the child paste back half of the number of let children (as if the transferee received the order in advance).

Japan-Korea rules. The rules are the same in Japan and South Korea, using the number method, and the black finale is 6 and a half meshes. Count the number of eyes of one side and record it, then count the number of eyes of the other side and record it, then black subtracts 6 and a half meshes, and finally compares with white, and the more wins.

Calculation method: Fence out a cross point on the chessboard to count 1 mesh, mention a piece to count 2 mesh, and lift a piece and glue it is also counted as 1 mesh.

There are 140 sunspots on the board, and the real space occupied by Black is 44 meshes, that is, Black occupies an area of 140 + 44 = 184 pieces; (2) There are 140 white discs on the board, and the real space occupied by White is 37 meshes, that is, White occupies an area of 140 + 37 = 177 discs.

If you don't post it. Using the numerical method, Black occupies 184 discs, and Black wins. Using the ratio method, Black has 44 meshes, White has 37 meshes, and Black beats White 44-37 = 7 meshes.

If it's a post, it's a sticker. Using the numerical method, Black occupies a piece after deducting the post, and Black wins, i.e., Black wins 1 4 pieces. Calculated using the fetch method, Black has an eye after deducting the eye, and Black beats the white side, that is, Black beats White 1 2 mesh.

Final Rules

1) When there is no single official or other officials, it is final.

2) In the game, one side admits defeat halfway, and it is the final game. The other side wins in the middle game. To admit defeat is to place two of your own pieces in the lower right corner.

3) Any game in which one side of the game abstains or is awarded a loss or draw by the referee for various reasons will also be final.

4) The final game confirmed by both sides shall be confirmed in the order of the turn, first by the turn, and then by the opponent with a piece of different color placed outside the line in the lower right corner of the board.

5) Live and Dead: At the end of the game, if both sides confirm that the move without two true eyes and is not in the double-active state, it is a dead move and should be extracted. At the end of the game, it is confirmed by both sides that two or more true eyes are live and cannot be extracted.

The so-called true eye is that both children are connected, and the other party cannot threaten themselves.

A cross point on the chessboard is counted as 1 mesh, a piece is counted as 2 mesh, and a piece is glued on it is also counted as 1 mesh. The place of common double life is shared by both parties, that is, half an eye per person.

The word "mesh" means that one side is surrounded by the air, the specific calculation method is the sum of the number of eyes of one piece of empty space minus the sum of the number of meshes that the other party has obtained in this space, regardless of which side has more meshes in the case of sticking to the mesh, the rules of Japan and South Korea all involve the number of meshes, but the mesh rules have great loopholes, such as the question of "whether the robbery is enough to make up for the last calamity" of the two encounters of Wu Qingyuan, a generation of Go masters.

In Go, the number of places is calculated to determine the winner or loser, and the Japanese algorithm is the number, and one empty calculation is one eye, so the place where the common double live is shared by both sides, that is, half a eye per person.

In Go, a piece (whether black or white) is two eyes, and half a piece is one eye, so half a piece is a quarter of a piece.

There is also a unit of measurement in the game of Go, and that is the goal. Half a eye is the smallest win or loss in Go.

Because Go has to be posted. So there will be a hemisphere.

A glance refers to the blank intersection point surrounded by a piece of chess.

The basic way to play Go.

1. Each side of the game holds a color of chess pieces, black first and white later, alternately playing, each time can only play one piece.

2. The pieces are placed at the intersection of the chessboard.

3. After the chess pieces fall, they are not allowed to move to other positions.

4. It is the benefit of both parties to take turns to play the lower piece, but either party is allowed to give up the lower piece and use the void.