Definitions of Square Dance Calls and Concepts -- Chain Reaction [by definition, C1] [C1]

Chain Reaction
の前

after
Those Facing Pass Thru as Ends of Center Line Counter Rotate 1/4

after
Centers of each side Hinge

Centers Star 1/4 as Outsides Trade
の後

Those who meet Cast Off 3/4 as Others move up
の後
(終わり)

Chain Reaction [by definition, C1] [C1]
(Lee Kopman 1975)

C1:

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From an applicable generalized 1/4 Tag.

Very Centers and the directly facing Outside dancers do a Pass Thru as the End of the Center Line Counter Rotate 1/4 (on the Outside); Centers of each side Hinge; Center 4 Star 1/4 as Outsides Trade; Those who meet Cast Off 3/4 as Others move up (Phantom Hourglass Circulate).

Ends in Parallel Lines|Waves.

注釈:

Those doing the Pass Thru should point at each other before moving. The Outside dancer who is not doing the Pass Thru should not move until one of the original Very Centers has appeared by his/her side. Should you prematurely turn in anticipation of the Hinge you will likely throw yourself (as well as other dancers) out of position.
Be careful and dance each part of Chain Reaction very precisely since the Hinge could be from a Mini-Wave or from a Couple; the Outsides Trade could be from a Mini-Wave or a Couple; the Star could be normal or facing; and the final Cast Off 3/4 could be an Arm Turn or a 'Push' Cast. Don't rush the execution of this call since teamwork is required for successful completion.

From symmetric starting formations, Chain Reaction (Star 1/4 or Star 3/4) always ends in Parallel Lines. It never ends in a Parallelogram. Chain Reaction, Star 1/2 sometimes ends in a Parallelogram.

Listed below are the eight possible symmetric starting formations and corresponding ending formations for Chain Reaction.

Starting formation		Ending formation	Ending formation
Centers	Outsides	(after Star 1/4 または 3/4)	(after Star 1/2)
R-H Wave	Couple	R-H Waves	R-H Waves
L-H Wave	Couple	L-H Waves	L-H Waves
R-H Wave	R-H Mini-Wave	L-H 2FL	Parallelogram 3 & 1 Lines
L-H Wave	L-H Mini-Wave	L-H Waves	L-H Waves
R-H 2FL	Couple	3 & 1 Lines	3 & 1 Lines
L-H 2FL	Couple	3 & 1 Lines	3 & 1 Lines
R-H 2FL	L-H Mini-Wave	3 & 1 Lines	3 & 1 Lines
L-H 2FL	R-H Mini-Wave	3 & 1 Lines	Parallelogram R-H Waves

CALLERLAB definition for Chain Reaction (C1)

CALLERLAB definition for Chain Reaction

Choreography for Chain Reaction [by definition, C1]

Comments? Questions? Suggestions?

C1: