# 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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### How to analyse my own games?

I try to review my own games in order to improve (I am maybe 16-15k). For every move that I think is wrong, I try to find a better move. My question is: how do I know the move I find in analysis in ...
191 views

### Is this a correct formal heuristic for invalid moves due to Ko?

In the game of Go, there is the ko rule, which basically states that immediately recapturing a single stone is not a valid move. I am working on a Go computer program and am trying to implement the ...
197 views

### Is there a formal designation for "pure placement" games?

Specifically in the context of abstract or combinatorial games. As an example, Go and Reversi are both placement games. Although mathematically distinct (Reversi requires placement in the center at ...
406 views

### Has computer go impacted the discussion about komi?

Komi is the number of points added to White's score in Go in order to compensate for his going second. Some fifty years ago, it was 5 1/2 points; then playing experience showed that it was ...
3k views

### In this Go position, can black capture the entire length of the white arm?

In the position below, can black capture the entire length of the white arm with a combination starting with placing a black stone on A?
270 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 ...
337 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 ...
158 views

### Go game set with balls or spheres

Once in a documentary I saw an exquisite Go Set. The stones were not double or single convex, they were actually balls (round spherical stones). The board had carved channels or grooves, so as you put ...
157 views

### What is the meaning of this Joseki continuation?

In games against Leela with 7 handicap stones, Leela (white) plays the following variant of a well known joseki (knight move approach with one space pincer) \$\$W \$\$ ---------------------- \$\$ |............
371 views

### How much of AlphaGo's success is due to novelty?

One of the running themes in the commentary I've read on AlphaGo's games is that, from time to time, the AI would make a sound play that was nonetheless completely unfamiliar to its opponent (and to ...
278 views

### How do I effectively use a big wall?

This is from an OGS game I (white, 21k) played against a 20k, specifically my move 26. I'm not even sure about white 24, but I definitely think white 26 was a mistake (although it worked out, but only ...
269 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 . . \$\$ | . . . ...
232 views

### How come this solution to Tsumego is working?

From the application Tsumego Pro, I found this problem (on Today's daily): \$\$ ------------------ \$\$ . . . X . . X O . | \$\$ . . . O X . X O . | \$\$ . . . O O X X O . | \$\$ . . . . O O O X . | \$\$ . . . . ...
1k views

### What is “looking for a place to resign” in go?

In a number of commentaries on professional games I have read that one of the players was “looking for a place to resign”. My impression was that this meant that they considered the game lost, and ...
577 views

### Do Go players play to minimize score difference after realizing they cannot win?

I would expect that players might opt for a strategy with a higher chance of winning despite having a greater chance of losing by a greater point difference. But after they see that they will lose, do ...
503 views

### What are some simple strategy games to play with a friend online? [closed]

I am looking for something we could play online and which is free. We had a lot of fun when we were just starting to play chess, and after a while it became a bit boring as there wasn't enough room ...
226 views

### Building a live group on a quarter board where two sides are already black

This exercise is kind of go club folklore: Given a quarter go board where two sides are already occupied by black (and unconditionally alive), white starts playing. White wins when she is able to ...
201 views

### Making sense of this app's territory resolution

In this "Go Free" Android app, I'm trying to make sense of the information it presents, in an effort to better understand the game. In the screenshot below: I'd be grateful for any assistance ...
183 views

### Corner enclosure after playing star point

As fas as I know the corner is fully closed after adding two more stones to 4-4 But what will happen if I simply play 3-3? Can I consider my corner closed or not?
318 views

### Overplay in orthodox fuseki - Leela AI fails miserably?

I'm not sure how much go is discussed on StackExchange, but currently I prefer trying it here than an actual go forum. This question concerns two topics: Recently the free go AI Leela has been ...
287 views

### Talking about Go: Using "he" and "she" for Black and White

It comes quite handy to assign different genders to the two abstract players "Black" and "White" and than use gendered personal pronouns in order to refer to them. But who should be male, and who ...
2k views

### Using the edges of the board in Go

So I have another question about counting territory. \$\$ --------------------- \$\$ | . . . . . O w w w | \$\$ | . . . . . O w w w | \$\$ | . . . . . . O O O | \$\$ | . . . . . . . . . | \$\$ | . . . . . . ...
1k views

### Territory inside of territory

I have a question about the ending/scoring of a Go game. Specifically regarding territory inside of territory. For example, in a position like this: \$\$ --------------------- \$\$ | . . . . . . O . . | \$...
181 views

### Help me refind this 3d go variant - pieces can be stacked in a pyramid fashion

Quite a while back I stumbled upon a 3D variant of the game go. What I recall of the rules: designed to be playable without extra equipment beyond go board and stones played on a 9x9 grid stones can ...
299 views

### Are there any legal go arrangements that can never occur in an actual game?

Are there any arrangements of stones that are: legal, because all groups have at least one liberty, yet impossible, because no sequence of moves could possibly result in such an arrangement. I'm ...
605 views

### Why is this move considered bad?

I'm trying to play against simple online bot cosmi.net. I started playing about two days ago, so I'm a complete beginner, and even the easiest version on 9x9 board is really hard for me to beat. This ...
2k views

### In Go can you put a counter in a place that had a prisoner

I just purchased Go, I have read two different sets of instructions but are still unclear on two points. If you surround a piece so all their liberties are taken, do you have to remove the prisoner ...
214 views

### Examples of steady play in Go games?

I am looking for examples of professional Go games where one of the pros played solid, steady moves that were initially considered slow by the commentators, but eventually won him/her the game. My ...
241 views

### Does playing a ko add a dimension to the game?

Playing a game of Baduk I was thinking that playing a Ko adds a dimension to the Tree of possibilities. Meaning it at least double the number of next moves the player may think of. Am I kind of right ...
609 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 ...
176 views

### What is the origins and evolutionary track of Go game?

I didn't find any source explaining the "origins" or "evolution", rather than just history of Go. Book and article suggestions would also be helpful.
2k views

### What is the easiest way to play DarkForest, probably the strongest publicly available go AI?

The strongest publicly available go AI is probably this: https://github.com/facebookresearch/darkforestGo, since there is currently no way to play AlphaGo. Is there any way to play this without ...
230 views

### How to evaluate this board situation under Japanese or European rules

In a game, the following board position remained after both parties passed: \$\$ ----------- \$\$ .XO.X.X.OX. \$\$ .XO.....OX. \$\$ .XOOOOOOOX. \$\$ .XXXXXXXXX. \$\$ ........... In the post game analysis it ...
411 views

### In Go, is there any aji left in this corner enclosure (3-5, 4-4, 6-3), and if so, how can it be invaded?

I often see the following three stone corner enclosure made in high level games, when the player wants to further secure his corner. This enclosure does not appear on the sensei's library page for 3-...
928 views

### In Go, what is the Superko rule, and is it used universally?

What is the Superko rule in Go? Is it used in most scoring/online systems, or only in certain ones?
459 views

### Oiling fake Yunzi stones [closed]

I bought some "yunzi" stones that came in straw bowls, but they aren't translucent at all. They are fully opaque. Considering the price paid (around 35 dollars, I bought it in Brazil), I think that ...
148 views

### Are there any single-screen human-vs-human go clients/programs available?

This is a question about Go software, so it might not be the correct place to ask this, but I expect it to be the best place. ;) I want to give a group of people a quick overview on Go but I don't ...
277 views

### What's the longest possible forced repetition in Go?

Assume no superko rules so the game would end with no result. And both players are willing to play the shortest possible cycle as long as they don't give their opponent a chance to win. There are 4 ...
665 views

### How does AlphaGo calculate?

Anyone knows the algorithm of AlphaGo? I heard that it's related to neural networks. But don't know the details? So it does not find the solution to win in a deterministic way, right? I think so, ...
254 views

### How/where can I get comments from strong players on my gameplay?

I'd like to get advice from strong go players - let's say amateur 6D+ or pros. What are my options for getting that advice? I am not necessarily looking for full game reviews, rather comments on one ...
459 views

### Is this a correct way to count territory in Go (by Chinese rules)?

I am not sure if I misunderstood the territory counting rules of Go or simply I ran into a software bug. One of the Go programs I use counts territories like this. Would you explain me please why B6, ...
143 views

### How can I "censor" players on the IGS server? [closed]

How can censor players on the Internet Go Server (IGS)? It says in the help you can block players from matches by "censoring" them, but there is no "censor" command.
221 views

### Counting a surrounded non-alive carpenter's square

I was playing against Crazy Stone and we ended up with (essentially) this corner situation: \$\$W \$\$ ------------- \$\$ | . . 5 X O . \$\$ | 4 1 3 X O . \$\$ | . 2 , X O . \$\$ | X X X X O . \$\$ | O O O O O . \$\$...
570 views

### Recording Go games and importing into software

In chess, algebraic notation is the standard for recording games and Portable Game Notation (PGN) is a format for importing games (notation plus metadata) into chess software or even forums. The Go ...
1k views

### Why is this tsumego solution wrong?

I'm trying to understand why my solution to this tsumego is incorrect. It's "Basic problem #26" from Tsumego Pro and looks like this: \$\$ ---------------------------- \$\$ . . . . . . . . X . O X . . | \$...
964 views

### Ranking of Go Software

Where could I find information about the level of Go playing software? In particular, I am looking for commercial software. Ideally, I'd like to find a live ranking, as obviously this field is ...
4k views

### Why are Elo ratings for go higher than for chess?

If we compare Elo(-like) ratings in chess and in go, we see that the highest ratings published for go (3621 for Ke Jie as of 2016-03-13 at goratings.org) are higher than those in chess (2851 for ...
687 views

### By how many points did alphago win against Lee Se-dol?

Today, the computer program AlphaGo from Google won against the Go world champion Lee Sedol. I read that it won by resignation. If I understand correctly, it means that Lee realized he could not win ...