Go Happy Cup -- Playing Go Is So Fun!

We mainly play 19x19 and 13x13 boards. 9x9 boards are also used for beginners. With even games, the following rules are used:

Board Size	Rule	Komi
19x19	AGA	7.5
13x13	AGA	5.5
9x9	AGA	5.5

For handicap games, usually 0.5 komi is used. For handicaped 13x13 games, the AGA Handicaps are used. So 13x13 handicaps are converted to equivalent 19x19 handicaps as shown below when calculating internal rankings:

13x13 Handicaps	19x19 Handicaps
2	3
3	5
4	7
5	9

If you use Chinese style counting, here is a convenience table:

Board Handicaps Komi Black Win White Win 19x19 0 7.5 ≥ 184.5 ≥ 177.0 19x19 1 0.5 ≥ 181.0 ≥ 180.5 19x19 2 0.5 ≥ 182.0 ≥ 179.5 19x19 3 0.5 ≥ 182.5 ≥ 179.0 19x19 4 0.5 ≥ 183.0 ≥ 178.5 19x19 5 0.5 ≥ 183.5 ≥ 178.0 19x19 6 0.5 ≥ 184.0 ≥ 177.5 19x19 7 0.5 ≥ 184.5 ≥ 177.0 19x19 8 0.5 ≥ 185.0 ≥ 176.5 19x19 9 0.5 ≥ 185.5 ≥ 176.0

Board Handicaps Komi Black Win White Win 13x13 0 5.5 ≥ 87.5 ≥ 82.0 13x13 1 0.5 ≥ 85.0 ≥ 84.5 13x13 2 0.5 ≥ 86.0 ≥ 83.5 13x13 3 0.5 ≥ 86.5 ≥ 83.0 13x13 4 0.5 ≥ 87.0 ≥ 82.5 13x13 5 0.5 ≥ 87.5 ≥ 82.0 13x13 6 0.5 ≥ 88.0 ≥ 81.5 13x13 7 0.5 ≥ 88.5 ≥ 81.0 13x13 8 0.5 ≥ 89.0 ≥ 80.5 13x13 9 0.5 ≥ 89.5 ≥ 80.0