Stable Neigh-bors solutions

Stable Neigh-bors was solved using Groovy by 3 contestants. Solution sizes: average 1015 bytes (shortest: 468; longest: 1860).

1415.

aditsu (S, L) (468 B)
1935.

bryanj (S) (776 B)
3129.

marting (S) (1860 B)