Dual Ladder

The term dual ladder or double ladder is an ambiguous Go term that has been used to refer to anything that involves two ladders of either the same colour or different colours. These ladders occur simultaneously, but could be back-to-back in the case of a spiral ladder. There appears to be no consensus on the terminology for this set of techniques.

See the following pages for more information on the specific kinds of dual or double ladders. However, the page titles may not be the authoritative names for the respective techniques.

Term	sense	Description	Example (also a link)
Alternative ladders	1	Multiple ways to start a ladder on the same stones
Alternative ladders	2	synonym for double threat ladder maker
Double threat ladder maker		A move threatens multiple ladders on different stones
Dual ladder breaker		A ladder breaker for two different ladders
guru-guru mawashi		Japanese for Spiral ladder
Hosai Masao - Two Ladders Mirror Go		A famous game with colliding ladders
Intertwined ladders		Two opposing ladders right next door to one another
Parallel ladders	1	synonym for intertwined ladders
Parallel ladders	2	A kind of turnaround ladder where the spawned ladder runs next to the first
Parallel ladders	3	synonym for Alternative ladders
Spiral ladder		A combination of sacrifices, squeezing and ladders (guru-guru mawashi)	(No example)
Turnaround ladder		A ladder where the defender can capture a stone to spawn a second ladder