law blank_at
import minebender-game@1.0.0.0/proof_lists.bend as ProofListsimport Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/board.bend as B
447law blank_at:
448 for +w: Nat
449 for +h: Nat
450 for +x: Nat
451 for +y: Nat
452 {B.at(Bool, False{}, B.blank(Bool, w, h, False{}), T.Pos{x, y}) == False{} : Bool}