Go online free browser game (aka Igo/Baduk/Weiqi). Board size 9x9. Player vs player or computer, watching games. Japanese Go rule. No e-mail registration. PC & Smartphone.

【How to play】
1. This game is based on the Japanese Go rule. (Text for inexperienced persons)
2. The default handicap (komi) is 6.5: Black gives to White in an even game.

Rank differenceHandicap
0Komi 6.5
1Komi 3.5
2Komi 0.5
3Reverse komi 2.5
4Reverse komi 5.5
5Reverse komi 8.5
6Reverse komi 11.5
7Reverse komi 14.5
8Reverse komi 17.5
9Reverse komi 20.5
10Reverse komi 23.5
11Reverse komi 26.5
12Reverse komi 29.5
13Reverse komi 32.5
14Reverse komi 35.5
15Reverse komi 38.5
16Reverse komi 41.5
17Reverse komi 44.5
18Reverse komi 47.5
19Reverse komi 50.5
20Reverse komi 53.5
21Reverse komi 56.5
22Reverse komi 59.5
23Reverse komi 62.5
24Reverse komi 65.5
25Reverse komi 68.5
26Reverse komi 71.5
27Reverse komi 74.5
28Reverse komi 77.5
29Reverse komi 80.5
Reverse komi 80.5

3. The time limit is 2 minutes and 30 seconds (that can be changed). It is not counted within 5 seconds. (Simple delay system)
4. An illegal point: foul defeat (9D-18K), warning dialog (19K-30K).
5. The match is stopped by both passes. If there are stones that can be taken in seki, please take them beforehand. "■" "□" are enabled territories, "×" "+" are disabled territories. If you have changed a match preference from "Auto agree" to "Manual agree", you can correct the result of automatic judgment. Please correct by clicking (or tapping) stones or territories on the board.
6. At rank match, players can rank up by points; 200 (8D-5D), 100 (4D-1D), 70 (1K-9K), 50 (10K-18K), 20 (19K-25K), 10 (26K-30K).

Rank differenceHandicap gameEven game
Higher winLower win

7. Abbreviations used in the game.

RHRank match and Handicap game
RERank match and Even game
FHFree match and Handicap game
FEFree match and Even game
RKReverse Komi

8. Please see also the Q&A.

【For inexperienced persons】
This game competes for the number of territories (intersections). Black gives handicap (komi) 6.5 to White in an even game.


BlackTerritories: BlackIntersections-TakenBlackStones=36-0=36
WhiteTerritories: WhiteIntersections-TakenWhiteStones=27-0=27
SurfaceOfBoard: BlackTerritories-WhiteTerritories=36-27=9 (●Lead)
Result: SurfaceOfBoard-Handicap=9-6.5=2.5 (●Win)

1. You can take opponent's stones by surrounding.


2. You cannot move to the place which becomes same shape repetition. Once it is necessary to move to other places. This state is called "ko".


3. If you cannot take opponent's stones, you cannot move to the place where your stones are taken.

the place where your stones are taken

4. Stones which have two eyes are not taken.

Stones which have two eyes

5. Black and White cannot move to "・". Because even if you want to take opponent's stones, your stones are taken first. This state is called "seki".


6. If you have filled in all places that do not become a territory such as "・", please pass. The judgment of territories is started by both passes.


7. After the judgment of territories started, stones which cannot make two eyes are removed as taken stones.

taken stones

【Game name】
Mini Go Online (MiniGoOnline)


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Igo Online
(19x19 Go)
Uragaeshi Online