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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2answers
349 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 ...
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6answers
2k views

What is the formula of rank difference to handicap stones?

When the difference in rank is one stone the weaker player takes black and the komi is 0.5 for white (sometimes called "no komi" even though that's not technically correct). From then on add one ...
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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 ...
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1answer
254 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 . $$ | X X X O X . . $$ | . . . ...
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1answer
303 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-...
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6answers
3k views

Where can I find a good Joseki database?

I've been wondering about certain positions that arise often. To help me understand them, I would like to study the joseki moves. Since printed joseki dictionaries are out-dated very fast, I'd prefer ...
9
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4answers
1k views

Why do player start with fighting for the corners in go?

I saw that in most go games the opponents started by placing chips 3 vertices away from the corners. Both players started fighting for the centre only after half of the game had passed. Is there any ...
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4answers
155 views

How many points are won/lost during this exchange?

$$ six=two $$ -.a..... $$ -....... $$ -...OOOO $$ -4....XO $$ -1OOOOOX $$ -XOXXO.X $$ -2X5.XX. $$ -3...... $$ -------- White territory around a is safe. Move 2 and 4 can be swapped for identical ...
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523 views

In Go, Why are “High Point” Openings Seldom Seen in Modern Play?

I'm talking about opening with the "high point" of a "shimari, such as the 3-5 or 4-5 point. The disadvantage is that it allows the opponent to enter near the corner, such as the corresponding 3-4 ...
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1answer
267 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 ...
9
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1answer
998 views

Deviation of 3-3 invasion - how to live/kill?

I know the following is joseki for an approach of the 4-4 stone followed by a 3/3 invasion... $$cm1 A normal 3/3 invasion joseki (incomplete) $$ +---------------------------------------+ $$ | . . . . ...
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3answers
283 views

Small go board history

Does anyone know origin of smaller go boards (9*9,13*13)? When (and where) was first introduced? I looked on Sensei library but didn't find anything about history of go boards.
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1answer
157 views

What rules are used in international events

What rules are used during international events like the recent Samsung Cup?
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5answers
741 views

How do I chose invasion or reduction points?

I have the following board: $$cm1 $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . O . . . . . . . . . . | $$ | . . . . . . . O O . X . . ...
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4answers
591 views

What happens in Go if you “take back” a ko before making a ko threat?

In Go, there is a potentially repetitive sequence of moves called a "ko." So if your opponent takes a ko from you, you have to make a move elsewhere on the board, called a ko threat, before "taking ...
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5answers
761 views

Online Resources for Go Tutorials on specific topics

It is well-known that learning about Go is a never-ending process. This question is on resources that I believe to be useful in a certain stage of this learning process. In the very beginning, there ...
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3answers
38k views

Is there a site to play Go online against a computer?

There are many go servers but all of them seem to be for player-player games. I want to play online against a computer. I found some but it is not an actual go. I was not able to find a real go brain ...
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4answers
2k views

Do strong Go players play simuls, like in chess? Do they ever play blindfolded?

Strong chess players will often play a "simul," walking from board to board and making a move on each, taking virtually no time to select their moves, and forcing themselves to keep track of many ...
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4answers
2k views

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

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: ...
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4answers
861 views

How to apply the ko rule (Go)

I’m having trouble understanding how to apply the ko rule. For instance, in the description in Wikipedia, there is an example where the ko rule can potentially apply. But suppose there were two, or ...
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3answers
2k views

What is the meaning of 'karai' and how is it applied?

A Western insei recently wondered about the term "karai": Japanese players call black 57 "karai", which is a term which I haven't heard used in western go at all! The meaning appears to be ...
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2answers
631 views

How do I properly place handicap stones?

Handicap games are very common in Go. The weaker player, taking black, gets to place (usually) up to 9 stones on the board, depending on the difference in skill. Both free and fixed placement are ...
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3answers
534 views

How to protect a large piece of side territory

I've played several games where I have gained a good chunk of side territory, but lost it due to invasion by the other player. Below is an example, ignore the placement outside of the area black ...
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2answers
1k views

How to begin learning Go?

I've been playing a bit with Go and after a few games I do get pretty well the different rules. The game indeed has a very deep strategy and I've read that to get a grip at that strategy, a player ...
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1answer
310 views

Is this corner dead?

Played a game on KGS. We are both 4K. He was good at life and death, and I am rusty. Was B1 sente? $$ ------------| $$ . X O 2 1 . | $$ X . X O . . | $$ . . X O . . | $$ . . X O O . | $$ . . X X ...
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1answer
492 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?
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2answers
1k 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 ...
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1answer
334 views

How to balance influence vs territorial plays on a 13x13 board?

Most of the answers to "What is a good opening on a 13x13 board?" deal generally with the differences between large and medium boards. I'd like to ask more generally about how I should be thinking on ...
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4answers
843 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 ...
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1answer
1k 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 ...
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2answers
658 views

How can I create that sharp, intense sound when placing a stone?

No matter the material (board, stones) being used, pros are able to create a very sharp, loud, intense and beautiful sound when placing a stone (which immediately sits perfectly placed on its ...
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2answers
211 views

Tsumego only solvable under NZ rules?

The most significant difference between the New Zealand rules and the other rules for Go is that suicide is not forbidden. In most cases, the only time this can come in handy is that you can suicide ...
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3answers
549 views

End game deciding on dead stones

In a game of Go, we were in a strange position. If my opponent moved at one point to put my pieces in atari, his pieces would get taken. If I moved at that same point my pieces would’ve been taken. ...
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2answers
660 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 ...
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1answer
831 views

Annotated 9x9 Go Games

I've recently started playing Go and I would like to study some annotated 9x9 games, but can't seem to find anything. Does anyone know where I could find such games? If it's free that would be even ...
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1answer
93 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 (...
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6answers
742 views

How does one set up a 1/4 board for Go – and is it a good way to start?

As a beginner, I was handed a full go board. And, somehow figured it out. A beginner friend wants to start "small" on something like 1/4 of the board. Personally, I think that we should start with ...
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4answers
435 views

Magic Sword: Peaceful Variation or is Punishment Possible?

In a game earlier today I encountered a deviation from the Magic Sword pattern that I haven't been able to find anywhere. Instead of cutting, White seemed to offer a peaceful trade of influence for ...
6
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1answer
451 views

Why is this the solution?

I'm a very weak go player, playing very occasionally. I however enjoy easy tsumego problems on the train on my phone, as I find it more fun than, say, crosswords or sudoku. However, the app I use (...
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3answers
426 views

Komoku-Oogeima joseki order variation

In a game my opponent deviated from the joseki line I was familiar with. $$W Actual game $$ ------------ $$ -........... $$ -.94........ $$ -.5128O..... $$ -..X36...0,. $$ -...7....... $$ -..............
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3answers
492 views

When should Beginners finish a Game of Go?

I was reading the answers to this question, about who has won a game of Go and came across the two following statements. You pass at the end of the game when you do not think you can increase your ...
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1answer
220 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 . | $$ . . . . O O O X . | $$ . . . . ...
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1answer
94 views

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 ...
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2answers
532 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 ...
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2answers
1k views

How can I quickly estimate my level in go by playing against a computer/tablet?

I would like to have an idea of my level in go (in kyu). This would for instance help me choose the most appropriate go books to read. I would like to do this through playing against a program—because ...
6
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1answer
170 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 ...
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1answer
255 views

Mysterious move

I'm watching a NHK cup match between Hane Naoki and Chang Hsu with japanese commenters so unfortunately I can't understand the explanations, and there is a move from black I can't understand (move 3 ...
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1answer
125 views

Having started a small avalanche, what does one do with an undefended cutting stone?

Having just looked at the small avalanche (nadare / konadare) in 38 Basic Joseki I tried it out as White in a 2-stone game against GNU Go and was surprised that it left out the move at a, immediately ...
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0answers
177 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 ...
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4answers
845 views

Is studying tactics for Go useless?

There are plenty of chess tactics trainers online, to improve your chess skills, but I cannot find a single one for go. Is studying tactics useless for go?