Joseki Quick Reference
Corner
- a : 3-4 Komoku
- b : 4-4 Hoshi
- c : 3-3 Sansan
- d : 3-5 Mokuhazushi
- e : 4-5 Takamoku
- f : 6-3 Oomokuhazushi
- g : 6-4 Ootakamoku
- h :5-5 Gonogo
[1]
Komoku
approach by White
- a : low
- b : high
- c : distant (low)
- d : distant high
- e : distant very high
- f : 'wrong' direction
- g : 'wrong' direction low
- h : 'wrong' direction very distant high
enclosure by Black
- a : low
- b : high
- c : distant (low)
- d : distant high
- e : sansan invasion
- f : shoulder hit
- g : very low
- h : outside contact (44 point outside contact?)
- j : inside contact
- k : very large knight's approach?
enclosure by Black [101]
- a : Iron pillar consolidation
- b : high slightly open
- c : low territorial
- d : large (low) development
- e : large high influence
- f : sansan prevention
- g : kosumi ???
[3]
Sansan
approach by White
- a : distant high most common
- b : shoulder hit common
- c : distant low a little heavy
- d : low a little heavier
- e : high challenged as joseki
- f : very distant hardly an approach
enclosure? by Black [102]
- a : large high most orthodox
- b : large low secure
- c : high prevent the shoulder hit
- d : low rare
[4]
Mokuhazushi
approach by White
- a : low most common
- b : sansan invasion
- c : high stay out of trouble
- d : distant low ancient
- e : very high very high and very uncommon
enclosure? by Black
- a : converts to 3454
- b : converts to 3354 (This move secures the corner and can be considered a change in original strategy, because the initial choice of 4-5 point is an influence-oriented move.)
- c : 3554 open
Side
Shoulder hit
, diagonally approaching a stone on the third line, is know as a shoulder hit. Black has several options for dealing with this move, the most important of which are a and b. Playing elsewhere is generally a bad idea in this situation.
Capping play
, approaching a stone on the third line from above, is know as a capping play. Common responses include a and b. Ignoring this move is less serious for black than ignoring a shoulder hit.
Approach
There are standard sequences on the side when invading a position, see Three Space Extension Invasions
..
[101] Bill: It seems strange to call these enclosures, except perhaps the Iron pillar, the 3-3 and the kosumi. In general it takes two additional plays besides the 4-4 to secure the corner. That is an important idea.
[102] Bill: Conversely, it seems strange to call these enclosures, because the 3-3 itself suffices to secure the corner. That is another important idea.