Ko Pages - Taxonomy

Table of contents Paths Main pages Books About threats Types of ko Examples & Exercises Rare ko shapes / Long Cycles ko rules Techniques Misc

Paths

• Ko Pages Beginner
• Ko Pages Intermediate
• Ko Pages Advanced
• Ko Pages Expert

• Mathematical Ko Terms
• Ko Types

Main pages

• Ko
• Ko exchange
• Ko fight
• Ko threat

Books

While many other books contain some material about ko, these books are dedicated to it.

• All About Ko
• Fighting Ko (The Book)
• Think Like a Pro - Pae

About threats

• Ko threat
• Ko threat exercises (path)
• Some types of ko threats
  • Local ko threat
  • Long threat
  • Loss making threats
  • Mutual ko threat
  • Muko, or false ko threat, i.e. not really a threat at all
• Ko threat functions
  • Primary ko threat
  • Secondary ko threat
  • Tertiary ko threat
  • Virtual ko threat (not literally a ko threat)
• Playing & evaluating ko threats
  • Ko threat - rule of thumb – How large does a ko threat have to be?
  • Value of a ko threat – Explores ko threats by follow ups (sente, ambiguous, gote).
  • Ko threat amplification – On enlarging the follow up of a threat.
  • Ko threat - playing order
  • Capture once to use up a threat
  • Try to get first capture in a ko
  • There are no ko threats in the opening

Types of ko

• Ko Types (unfinished path)
• Direct Ko
• Approach Ko
  • Rogue ko
• Multiple Ko (see also Rare ko shapes)
  • Double ko
  • Triple ko
• Stage Ko
  • Dan ko (Japanese term for the same)
  • Two stage one move approach ko
• Some special small Kos
  • Half point ko
  • Real half point ko
• Lopsided Kos
  • Ten thousand year ko
  • Sente Ko
  • Ladder Ko
  • Flower viewing ko
• Ambiguous Ko
• Game-deciding Ko
• Chinese Ko — A half-point ko only worth fighting in the endgame if Chinese scoring is used(?)

Examples & Exercises

• Ko Threat Exercises
  • Ko Threat Exercise 1
  • Ko Threat Exercise 2
  • Ko Threat Exercise 3
• Ko fight
  • Ko fight example
  • Ko fight example 2
  • Ko fight example 3
  • Ko fight example from a pro game - 1
  • Ko fight example from a pro game - 2
  • Ko fight example from a pro game - 3
  • Ko fight example from a pro game - 4
  • Ko fight example from a pro game - 5
• Ko threat in seki example
• BQM573
• Counting Problem 1
• Ko position from one-space low pincer

Rare ko shapes / Long Cycles

• Double ko seki
  • Moonshine life
• Triple ko
  • Cho Chikun - Kato Masao, 14th Judan 1975 (Triple Ko)
• Quadruple ko
  • Chang Hao - Lee Changho, Southern Great Wall Cup, 2005 (Quadruple ko)
  • Quadruple ko seki
  • Quadruple ko fight
• Quintuple ko
• Long cycles
  • Eternal life
  • Eternal ko
  • Molasses ko
  • Round robin ko
  • Pinwheel ko
  • Shimada's ko

ko rules

• Ko rules
• Go Rules Bestiary - on unintended consequences, many of them ko related
• Cycle
• Cyclic positions taxonomy
• Fixed ko rule
• Ing ko rule
• Ing-Spight Ko Rule
• Pass As Ko Threat
• Ko & the end of the game
  • No result
  • Bent four in the corner is dead
  • Unremovable Ko Threat
  • Unremovable Ko
• Special ko terms in rules
  • Fighting Ko and Disturbing Ko
  • ko ban
  • ko mouth
  • hot stone
• Superko
  • Active superko
  • Superko Anomalies
  • Superko Puzzle 2
  • Situational Superko
  • Positional Superko
  • Positional Superko / Example
  • Positional vs Situational Superko
  • Natural Situational Superko Rule
  • ColorblindSuperko
  • Chinese Superko
  • Minimal Superko

Techniques

• Lose a ko to win the game
• Remove double threats before you first capture the ko
• Force your opponent to start a ko that he cannot win
• Threatening a ko
• Capture First

Misc

• If you don't like ko, don't play go
• Taking sente in a ko
• BQM 422
• One Thousand and One Life-and-Death Problems / Problem 752 - Mannenko Discussion
• Antinoun/BeginnerKoFights
• Research on Ko
• Card Game Model of Ko
• HolIgor / meets triple ko
• Ko / etymology discussion
• Synthetic Two Stage Ko
• Smallest Kos