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.

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GoKGS: why are 1st and 2nd dan playing 9-stone handicap game?

I was surprised when I saw a running game chance (1d) vs wangyue (2d): https://www.gokgs.com/gameArchives.jsp?user=chance wangyue had handicap 9 stones, but why? There is only one class difference! ...
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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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2answers
303 views

How do ranks work in Go?

One of the most commonly asked questions of beginners. How do ranks work in Go? Why do we start backwards? And why do we suddenly count upwards again? What is the difference between 9d and 9p? How is ...
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1answer
49 views

Dan levels: difference between amateur and professional? [duplicate]

Is there a difference between amateur and professional dan levels in go? If yes, how are they related?
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57 views

First things to learn about semeai?

I would like to learn more about semeai and be able to quickly learn about how to handle the most common situations (determine quickly whether a group is alive, dead, or undetermined). Now, there is ...
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3answers
1k 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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3answers
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4-4 high approach - why is the defensive approach prefered?

In the 4-4 high approach joseki, why would black ever want to play the defensive - left variant? The result of the right variant looks much better! While the left variant leaves monkey jump ...
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4answers
593 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
365 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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3answers
705 views

How does the full-size board change the game of Go?

My Go board has two playing surfaces, one big and the other small. As a Go beginner, I have been playing on the reduced size board. I assume this is recommended because it makes games shorter, and ...
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4answers
653 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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1answer
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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? ...
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2answers
69 views

4-4 high approach joseki question

I have a question about 4-4 high approach joseki. Everything is clear until move 4. I don't know how to respond if black plays C15 instead of the expected C17 (stone number 5). It leads to the ...
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4answers
2k views

Is there a site to solve tsumego online?

I'd like to solve tsumego online, not having to install a program or app locally. Are there any sites that allow this? How about for smartphones?
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2answers
112 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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2answers
147 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 ...
3
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2answers
103 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 ...
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2answers
502 views

Are professional ranks representative for how many stones of handicap players can give each other?

It was mentioned elsewhere that a 9p could not give 7 stones to a 2p. I have no databases available and wondered if this is correct. Bonus: If they aren't representative, why not? And is there a ...
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6answers
831 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 ...
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3answers
122 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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4answers
276 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 ...
14
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3answers
540 views

How to play teaching game and give a useful review

I've reached a rank where I'd like to start and help weaker players improve their games. How can I make a review useful for the opponent? Should I go deep into variations Talk about theory? Should ...
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2answers
135 views

How to count non fully walled territory?

I just started to learn Go. I still have some problems to properly understand how to count territory when the game has finished (by both players passing). For example, if the game ends in the ...
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2answers
393 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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5answers
356 views

How does one set up a 1/4 board for GO?

As a beginner, I was handed a full go board. And, somehow figured it out. A beginner friend wants to start "small" and something like 1/4 of the board. Personally, I think that we should start with ...
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Is Go played for money?

Playing for money in this meaning would be single games played for some stake, not tournaments with a prize money. Backgammon has a large tradition to be played like, chess a smaller one (I think). I ...
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7answers
284 views

At what level should one try to teach go?

I am now at a level where I don't consider myself to be a complete beginner, and I can now recognise at least some of the mistakes made by lower level kyu players. I would like to help other people ...
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5answers
314 views

What is a good way to get used to counting points?

Being able to count is important - in the end, it's about the points. Does anyone have any tips to get used to counting during a game, little things that can speed it up or make it a little less ...
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7answers
517 views

Strategy for studying professional games?

I recently took A. Dinershtein's Go style test. It was useful to me, as the test is aimed at finding professional players who might think the way you do, for study purposes. It has definitely worked ...
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2answers
141 views

Which games are most rewarding to review? [closed]

I play Go online and have by now quite a few sgf's of past games available which I could review. I'm however lazy so I certainly wont review all or even most of them. So which ones can I learn the ...
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192 views

3-4 point joseki - wide double-pincer

After a low approach at W2, B3 is a wide pincer. I double-pincered at W4 and then diagonal B5. $$ $$ . . . . . . . . . . . | $$ . . . . . . . . . . . | $$ . . . . . . . . 4 . . | $$ . . . . . . . 5 ...
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2answers
231 views

4-4 pincer variant - not in joseki dictionary

I am 4K and played against 2K in handicap game (2-stones). The point of B3 was to prevent a double-wing shape for white (along the right and bottom) So W4 pincer leads us into this joseki variant. ...
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254 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
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life and death: 2 x 4 in the corner with defects

In a go game (with another 4K) I got a 2 x 4 region in the corner with lots of defects. W1 almost surely will happen. Can White get life or ko? $$Wm1 $$ |------------ $$ | . . . . X . $$ | . . O ...
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13answers
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Where to play Go online? [closed]

I used to play regularly on KGS but have been inactive for several years. I am frustrated by the Catch-22 of the KGS system: in order to play rated games, you must have a solid rating. Solid ratings ...
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2answers
259 views

Three-space jump on third line: how to connect?

I've seen that in the diagram below, the two black stones can connect by attaching to the white stone, but I can't work out the sequence. How does black play to connect her stones? $$cm1 $$ . . . . ...
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5answers
440 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 ...
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1answer
187 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
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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 ...
7
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2answers
389 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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3answers
562 views

Computer Go algorithms applied to other games?

Fairly recently, Computer Go programs became able to compete with humans using Monte-Carlo Search trees: A Monte Carlo (MC) go program plays random games and easily evaluates the terminal position ...
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4answers
304 views

Is there an equivalent of Deep Blue in the Go world?

Deep Blue was a chess-playing computer developed by IBM. On May 11, 1997, the machine won a six-game match by two wins to one with three draws against world champion Garry Kasparov. Kasparov accused ...
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1answer
606 views

What are the main results in game theory regarding Go?

What are the main mathematical results concerning Go? Go is a game with simple rules and big game complexity. It is inefficient to apply primitive chess AI methods (such as position brute force and ...
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3answers
2k views

Is playing on a 9x9 board a solved problem?

I would think that on a 9x9 board, the number of possible moves is small enough that computers could exhaustively search all possible permutations and compute a line of play that always wins by moving ...
11
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2answers
283 views

Why are Chinese stones half-convex?

Unlike regular ishi that come in full-convex shape, Chinese stones are flat on one side. I found those stones difficult to work with, as they are not easy to pick up from the board. Granted, they lay ...
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1answer
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What are the difference between Chinese and Japanese rules in Go?

What are the differences? And do these differences influence strategy?
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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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3answers
385 views

Why are stones placed with index and middle finger?

I have read that stones should be picked out of the bowl and placed on the board by pinching them between the tips of the index and middle finger. This seems to be a long-standing tradition. Is this ...
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2answers
183 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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3answers
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Traditional 1-stone handicap before komi

In "traditional" handicap, when there is a ranking difference of 1, black plays first and there is no komi (Sensei's Library uses this term). But if you play without komi anyway, this is no handicap. ...