LAWS.within_one: def of minebender-game@1.0.0.0
Import: import minebender-game@1.0.0.0/LAWS.bend as LAWS
Lines 42-46 of minebender-game@1.0.0.0/LAWS.bend: https://jend.leeeet.dev/read.txt?path=minebender-game@1.0.0.0/LAWS.bend&start_line=42&end_line=46

import Base
import minebender-game@1.0.0.0/types.bend as T

# p and q are at most one step apart in each direction (or the same cell).
def within_one(p: T.Pos, q: T.Pos) -> Bool:
  match p q:
    case T.Pos{px, py} T.Pos{qx, qy}:
      Nat.is_le(dist(px, qx), 1n) && Nat.is_le(dist(py, qy), 1n)

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/LAWS.bend&name=dist
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Pos