From columns: Circulate. Half Circulate. The columns of 6 then Invert
the Column 2/3. The resultant center diamond Drop In.
\syhlines{b4e,g4e,b1e,g1e}
\sxvlines{b4w,g3e,b1w,g2e}
before Cooperate
after
The celebrated cheat for this is Tandem Reach Out.
Since this starts with a Circulate, it is subject to the "<anything> Cooperate"
construction, as in "Split Counter Cooperate" or "Triple Scooter's Cooperate".
On Cooperate but <anything>, the <anything> replaces the centers' Drop In.