【Overview】
Go online free browser game (aka Igo/Baduk/Weiqi). Player vs player or computer, watching games. Japanese Go rule. No membership 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 difference	Handicap
0	Komi 6.5
1	Komi 0
2	Reverse komi 13
3	Reverse komi 26
4	Reverse komi 39
5	Reverse komi 52
6	Reverse komi 65
7	Reverse komi 78
8	Reverse komi 91
9	Reverse komi 104
10	Reverse komi 117
11	Reverse komi 130
12	Reverse komi 143
13	Reverse komi 156
14	Reverse komi 169
15	Reverse komi 182
16	Reverse komi 195
17	Reverse komi 208
18	Reverse komi 221
19	Reverse komi 234
20	Reverse komi 247
21	Reverse komi 260
22	Reverse komi 273
23	Reverse komi 286
24	Reverse komi 299
25	Reverse komi 312
26	Reverse komi 325
27	Reverse komi 338
28	Reverse komi 351
29	Reverse komi 360.5
∞	Reverse komi 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 difference	Handicap game	Even game
		Higher win	Lower win
0	±10	±10	±10
1	±10	±5	±15
2	±10	±1	±19
∞	±10	±1	±19

6. Abbreviations used in the game.

Abbreviation	Meaning
RH	Rank match and Handicap game
RE	Rank match and Even game
FH	Free match and Handicap game
FE	Free match and Even game
S	Stone
RK	Reverse Komi

7. 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.



4. Stones which have two eyes are not taken.



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.



【Game name】
Igo Online (IgoOnline)

【Version】


【Information】
SAKURA-ENT.NET
The terms of use, privacy policy, Q&A, system requirements and contact information are here.