Rule:Grapefruit

@RULE Grapefruit

rabbit, 2026-01-18

The B-heptomino exhibits partial replication with Pi-heptomino intermediaries. An 'unstable' switch engine turns into a blocklayer. Twin bees becomes a stable p46 oscillator without supports. Surprisingly, the rule does not appear to be explosive, despite some small seeds exhibiting high growth rates.

@TABLE n_states:3 neighborhood:Moore symmetries:permute

var a1 = {0, 1, 2} var a2 = a1 var a3 = a1 var a4 = a1 var a5 = a1 var a6 = a1 var a7 = a1 var a8 = a1 var a9 = a1

var e1 = {0, 2} var e2 = e1 var e3 = e1 var e4 = e1 var e5 = e1 var e6 = e1

1, 1, 1, 2, 2, 2, 0, 0, 0, 0
1, 1, 1,a1,e1,e2,e3,e4,e5, 1

e1, 1, 1, 1,e2,e3,e4,e5,e6, 1 e1, 1, 1, 1, 1, 1, 1,a1,a2, 2 a1,a2,a3,a4,a5,a6,a7,a8,a9, 0

@COLORS 0 0 0 0 1 238 136 34 2 238 34 68