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Questions tagged [go]

An ancient strategy game for 2 players who try to outwit each other by placing stones on the board to simulate the capturing of territory. To add a board diagram to a post, see instructions in the tag-wiki.

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10 votes
5 answers
3k views

Go: Why did I lose? How is territory defined?

I don't understand why I lost or how territory is defined when both players have a bid for territory. Here I lose by 25 points (5x5 board). But it seems to me that I have an equally valid bid for ...
3 votes
1 answer
315 views

A Problem with Hidden Move Go

I have just learned about Hidden Move Go and I have a problem. Let us assume that one of our opponent’s hidden stones has only one liberty, i.e. it is in atari. But they don’t know that, because one ...
11 votes
2 answers
306 views

How does black kill white in this Tsumego?

I'm struggling with "Basic problem #46" from Tsumego Pro. It looks like this, black to play: $$ |-------------- $$ | . O O . . . . $$ | . . O X X . . $$ | . O O X . X . $$ | X X X O X . . $$ | . . . ...
4 votes
1 answer
105 views

What does an equal odds Go game look like between a top human and top AI?

Ever since AlphaGo the top Go-playing computers have been stronger than the top humans. How much stronger? As I understand it Go has two kinds of handicaps - one where the weaker player starts with X ...
11 votes
5 answers
2k views

What are examples of Go played on non-flat surfaces, like on a sphere? [closed]

I know there was some thought put into how Go looks or feels like if it's not plaey on a flat, rectangular surface, but the surface of a 3-d object like a sphere or a donut. I'm mostly interested in: ...
10 votes
6 answers
3k views

Why don’t you capture more territory in Go?

If you have large areas like here in the white upper left corner, why can't black just put a stone in upper left corner? Then white would lose one point. Or white would have to capture it and get a ...
3 votes
2 answers
304 views

Go ending. Why do players stop? [duplicate]

I'm learning the game GO. I see that after the players have made a lot of moves, at the end of the game, there are several visible territories for black and for white. But I don't understand, why does ...
4 votes
2 answers
194 views

Strange variant of 4-4 low approach joseki

(not sure how this joseki variant is named, feel free to update the title). Josekipedia is saying about this joseki position "Position is settled": but, after N14, M14, the white group O14 ...
3 votes
2 answers
173 views

How is this Go game scored?

I thought I had lost, but Cosumi says that I (white) won the game (I think by 27 points). I don't see how those 7 black stones are prisoners rather than the adjacent 4 white stones. Am I missing ...
4 votes
2 answers
208 views

Should black pass in this situation?

Suppose a game of go ends up in the follow position, with black to play. (Assume everything is settled apart from the situation in the centre of the board.) As black it seems like there's no ...
4 votes
1 answer
366 views

Is there more than one solution to this problem about cutting in go

I have this past week been learning to play go from the book Learn to Play Go by Janice Kim and Soo-hyun Jeong. In one of the earlier chapters the concept of cutting is brought up and the following ...
6 votes
1 answer
411 views

Does the Cosumi Go site sometimes get the score wrong?

Cosumi claims that I won this game by 37 points: — [9×9, Level 0] Black(You) Wins by 37 Points - Go Browser Game COSUMI But it looks even to me. Am I missing something, or does the site sometimes get ...
3 votes
1 answer
136 views

When does it not make sense anymore to play into an opponent's territory? [duplicate]

I am a GO beginner. I think I know the basic rules. I have a strategy question: Why does it NOT make sense to play into an opponent's territory? I think I understood that the free(!!!) positions ...
2 votes
4 answers
348 views

Go end game scoring question

I'm trying to learn Go and I'm very confused by how end of game scoring works. I've played a game against an AI player, and I don't understand the scoring that the computer came up with once the game ...
38 votes
5 answers
5k views

Is "Adversarial Policies Beat Professional-Level Go AIs" simply wrong?

Since 2016, when AlphaGo beat Lee Sedol, probably the world's strongest player, humans have essentially not had a chance against a well-trained AI. Now, a paper "Adversarial Policies Beat ...
2 votes
1 answer
139 views

Where can I see statistics of Go points for different skill levels?

I'm a total Go novice, and barely even understand the rules. From what I understand, at the end of the game each player has an amount of "points" which is equal to the amount of stones they ...
6 votes
0 answers
166 views

Why was stone scoring (group tax) abandoned?

The game of go is said to have simple rules. Simpler, say, than chess, because there is no need to learn how pieces move. However, there are various rulesets (Japanese rules, Chinese rules, differing ...
30 votes
1 answer
2k views

What are the main results in combinatorial game theory regarding Go?

What are the main mathematical results concerning Go? Go is a game with simple rules but high game complexity. It is inefficient to apply primitive chess AI methods (such as position brute force and ...
7 votes
2 answers
761 views

Do bridge champions retain their abilities to a later age than those of chess or go?

My understanding is that bridge champions can continue winning tournaments into their sixties, and even later in life. On the other hand, chess champions often seem to lose their crowns in their ...
6 votes
1 answer
230 views

How many different games of Go are actually played?

Go is known for having a vast space of possible board positions, which was one of the reasons why computers weren't able to compete for a long time. I wonder how many of these board positions are ...
32 votes
2 answers
15k views

What are the differences between Chinese and Japanese rules in Go?

What are the differences? And do these differences influence strategy?
0 votes
2 answers
402 views

Survival of Live Groups in the game of Go [closed]

In go, does a live group with 2 eyes survive being surrounded by the other players stones or are the stones in that live group dead? If I invade my opponent's surrounded territory with just 1 stone, ...
4 votes
2 answers
208 views

Alive strings inside a string?

$$ ------------------ $$ | O . O X . . . . $$ | . O O X . . . . $$ | O O O X . . . . $$ | X X X X . . . . $$ | . . . X . . . . $$ | . . . X . . . . $$ | X X X X . . . . $$ | . . . . . . . . How is ...
13 votes
1 answer
891 views

What was the effect of AlphaGo on Go?

When the AlphaGo programs first appeared experts claimed certain moves opened their eyes. Now a couple of years later I wonder what the effect is on go. Has human performance improved, like when chess ...
12 votes
6 answers
2k views

What is the formula of rank difference to handicap stones?

When the difference in rank is one (examples: 1 dan vs 1 kyu, or 1 kyu vs 2 kyu), the weaker player takes black and the komi is 0.5 for white (sometimes called "no komi" even though that's ...
2 votes
1 answer
4k views

Go - How does one count territory in these two scenarios? (9x9)

I'm learning to play Go and I was trying to develop a game in java, but I'm still not sure how to count territory in some cases. In the scenario below, which side belongs to White, Top or Bottom? $...
5 votes
3 answers
740 views

Why do we surround the corner in go?

After watching several tutorials, everyone says to surround the corners. I was wondering why you do this? If I start playing the corners, how do I combat white if they instead start to only develop in ...
5 votes
1 answer
854 views

How to run strong Go (baduk) playing program locally?

There are some strong bot-players on KGS (from 4d to 2K). I saw pachi, ayamc and even gnugo having dan ranks on KGS. I wonder how to run such a strong bots offline. I tried gnugo and aya, both ...
19 votes
2 answers
4k views

Why doesn't a go board have an 'I' ('i') column?

I'm really confused, but it seems to be the convention that there is no "I": The rows are numbered 1 to 19...
8 votes
1 answer
329 views

What is the smallest territory in go that can be successfully invaded?

Let's stay one player has a corner of the board totally enclosed, but with no stones in it, like this: $$ ------------------ $$ | . . . . . . X . $$ | . . . . . . X . $$ | . . . . . . X . $$ | . . . . ...
7 votes
4 answers
1k views

What are good ways to learn to "read" a sequence of moves mentally?

What are good ways to learn to "read" a sequence of moves mentally (i.e. visualize it in one's mind), in Go? Is practicing on a goban useful, or is trying to stick to mentally imagining the moves ...
2 votes
2 answers
141 views

Tricky 3-3 invasion

If white tenukis thrice after the 3-3 invasion, and answers Q18 with R18, then white kills with S19: But what if white plays Q19 instead? Can black still kill unconditionally, or ko is the best one ...
8 votes
1 answer
251 views

How was "komi" re-set in the past 50 years?

"komi" represents a number of points added to White's score at the end of a game of Go to compensate White for the fact that Black moves first. It is usually X.5 points (e.g. 7.5) to prevent a tie (...
13 votes
4 answers
8k views

What is a good opening for Go on a 13x13 board?

I have been playing a lot of Go recently at lunch but we are playing on a 13x13 board instead of a 19x19. I can't seem to ever win! I am beginning to think that my opening is leaving me in a bad ...
5 votes
2 answers
445 views

4-4 high approach joseki incomplete?

I have a problem with the 4-4 high approach joseki - the left variant: In the left variant, black ends the joseki and white can play anywhere else, i.e. has sente. But the position is pretty weak for ...
3 votes
1 answer
221 views

In this Go game why does the territory appear as being completely captured

I've been learning to play Go for the past few days, and in this game I'm playing I don't understand exactly how I captured the whole board in one move. These images show what happened.
6 votes
1 answer
166 views

Where can I find a database of Go games with move times

I am looking for a database of 19x19 Go games (complete games) including the time spent on each move, or the global time in each move. Other aspect is that its need to be without bots or any ...
6 votes
1 answer
156 views

How does white win this capturing race?

I'm reading "Sabaki, the art of settling stones" by Richard Bozulich. On page 98, it proposes the following solution for white to settle his stones. The explanation reads "after the ...
1 vote
1 answer
586 views

Go question about eyes

I just learned how to play GO today, and I was stuck on one thing in particular. This was the board state: As you can see on the south-west corner (close to A1), I tried to capture my opponent's (...
10 votes
2 answers
8k views

What is this game that's similar to Go?

I always thought that Go was played by trying to place 5 of your pieces in a row while blocking your opponent from doing so, but I just recently looked up the rules, and it's completely different. Is ...
4 votes
1 answer
199 views

Why are the white stones in the bottom left of this game counted as points for black?

I played the following game: https://online-go.com/game/25722260 In the final position, it seems to me that the stones in the bottom left are in seki, but the score estimator says that the white ...
1 vote
2 answers
279 views

Female Go champions?

Has there ever been a female European, East Asian, or other regional Go champion (or, before these titles existed, any woman who was widely regarded as the best Go player in her community or region)? ...
28 votes
6 answers
3k views

What is a good strategy for engaging children in playing go?

For children what is the youngest age that it makes sense to begin to teach them go? Is it best to start them on a 9x9 board? Will a child that has learned basic algebra be better suited to learn go ...
0 votes
2 answers
197 views

Can this game still be won?

I am black and white has expanded more than I thought. It’s almost at tie at this stage but I can’t see how to win. Can this game still be won?
5 votes
1 answer
380 views

Is it possible to live with false eyes, only?

Sometimes, in a game of Go, we get a life where there is a false eye involved: There are two groups with a single real eye, each, but they are connected to one another via a false eye, allowing their ...
5 votes
2 answers
638 views

in Go, why does this setup make a false-eye?

I am an absolute beginner, trying to learn. Let's consider that board (from a tutorial at http://playgo.to/iwtg/en/): It's black's turn to play. The topic is to avoid a false eye at D9. According ...
4 votes
3 answers
458 views

Best move for this pattern, in Go

I am the black side. It’s my turn to play. $$Bcm4 $$ +---------+ $$ |.........| $$ |.........| $$ |..X...X..| $$ |.........| $$ |....,.2..| $$ |....1Xa..| $$ |..XbOOX..| $$ |.........| $$ |.........| ...
4 votes
1 answer
143 views

Newbie go question: why can I do one move but not the other one

I am playing with SmartGo and I don’t understand one situation. I am playing as Black. $$Bcm82 $$ +---------+ $$ |O.O.OX.X.| $$ |OOOOOXXXX| $$ |.OXXOXXO.| $$ |OOOXXXXXX| $$ |COOOOOXXX| $$ |2XO.OOOX.|...
3 votes
1 answer
100 views

Can anyone explain the last move on this go board

I’m learning so I’m going through all beginner problems I’m finding and I do not get this: The problem starts like this; I am trying to protect the black stone on the right side. After I played, the ...
12 votes
3 answers
355 views

Why do asymmetric ko fights exist?

When I play teaching games with much stronger go players, situations often come up where one side must win a ko fight in order to survive. In these situations, my opponent will explain to me that ...

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