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9×9 Go (Igo, Baduk, Weiqi) game.

【How to play】
1. This game is based on the Japanese Go rule.
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

3. The time limit is 2 minites and 30 seconds. It is not counted within 5 seconds.
4. An illegal point: foul defeat (9D-18K), warning dialog (19K-30K).
5. The match is stopped by both passes. If the automatic designation of dead stones is wrong, please correct by clicking. If there is a seki, please change enabled territories (■or□) into disabled territories (×or+) by clicking.
6. Players can rank up by points; 20 (8D-5D), 10 (4D-1D), 7 (1K-9K), 5 (10K-18K), 2 (19K-25K), 1 (26K-30K).
7. If the user data is not saved, it is necessary to set the DOM storage effective.


【For inexperienced persons】
This game competes for the number of territories (intersections).



BlackTerritories:
BlackIntersections-BlackDeadStones
=36-0=36
WhiteTerritories:
WhiteIntersections-WhiteDeadStones
=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. Black and White cannot move to "・". Because their stones will be taken. This state is called "seki".



5. Stones which have two eyes are alive and are not taken.



6. After the match stopped, stones which cannot make two eyes are taken as dead stones.



【Information】
Online Labo
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