Ruleset Ko Rule Suicide
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Japanese Ko Illegal
Korean Ko Illegal
Chinese Positional Superko Illegal
AGA Situational Superko Illegal
Ing Positional Superko Legal for groups with 2+ stones
New Zealand Situational Superko Legal
Tromp-Taylor Positional Superko Legal
Ruleset Scoring Method Counting Method
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Japanese Territory Territory
Korean Territory Territory
Chinese Area Area
AGA Area or Territory Area
Ing Fill-In Area
New Zealand Area Area
Tromp-Taylor Area Area
Ruleset Compensation Points Seki Scoring
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Japanese 6.5 Eyes in seki do not count
Korean 6.5 Eyes in seki do not count
Chinese 7.5 Eyes in seki count
AGA 7.5, extra for handicap Eyes in seki count
Ing 8, black wins ties Eyes in seki count
New Zealand 7 Eyes in seki count
Tromp-Taylor 7 Eyes in seki count
Ruleset Handicap Rules Additional Rules
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Japanese Fixed placement None
Korean Fixed placement None
Chinese Fixed or free placement None
AGA Fixed or free placement Pass stones, white moves last
Ing Free placement None
New Zealand Free placement None
Tromp-Taylor Free placement None
Ko rule: A player may not recreate the previous board position.
Original superko rule (aka positional superko): A player may not recreate
any previous board position.
Situational superko: A player may not recreate any previous board position
with the same player to move.
Fill-In Scoring: Each player has exactly 180 stones, at the end of the game
they fill in their territories in turn until only one player has
unfilled territories remaining on the board; that player wins by the
number of unfilled territories remaining.
Pass stone rule: When a player passes, he hands over a "pass stone" to his
opponent to be treated as a prisoner. This helps make territory and
area scoring mathematically equivalent.
White moves last: White must make the last move, generally that means if White
passes first and Black passes immediately afterward, players agree on
the status of groups first then White must hand another stone over for
his second pass. This ensures both players make the same number of
moves and helps make territory and area scoring mathematically
equivalent.
AGA Handicap Compensation: In AGA rules, White recieves 1 additional point of
compensation for every handicap stone placed on the board except for the
first.