【Overview】

Go online free browser game. Go is also known as Igo/Baduk/Weiqi. Player vs player or computer, watching games. Japanese Go rule. No e-mail registration.

【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
KomiReverse komi
06.5
10
213
326
439
552
665
778
891
9104
10117
11130
12143
13156
14169
15182
16195
17208
18221
19234
20247
21260
22273
23286
24299
25312
26325
27338
28351
29360.5
360.5

3. An illegal point: foul defeat (9D-18K), warning dialog (19K-30K).

4. The match is stopped by both passes. "■" "□" are enabled territories, "×" "+" are disabled territories. If the automatic judgment is wrong, please correct by clicking stones or territories on the board.

5. 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
0±10±10±10
1±10±5±15
2±10±1±19
±10±1±19

6. Abbreviations used in the game.

AbbreviationMeaning
RHRank match and Handicap game
RERank match and Even game
FHFree match and Handicap game
FEFree match and Even game

7. Please see also the Q&A.

【For inexperienced persons】

Go game competes for the number of territories (intersections). Black gives handicap (komi) 6.5 to White in an even game.
territories
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.
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".
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".
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.
pass

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

【Game name】

Igo Online (IgoOnline)

【Version】

Mini Go Online
(9x9 Go)
Uragaeshi Online
(Reversi)