law none_among_sum
import minebender-game@1.0.0.0/proof_solver.bend as ProofSolverimport Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/solver.bend as S
import minebender-game@1.0.0.0/proof_sums.bend as PU
135law none_among_sum:
136 for +part: T.Grid(Maybe<&2, Bool>)
137 for +ps: List<&2, T.Pos>
138 {S.none_among(part, ps) == PU.csum(~Maybe<&2, Bool>, ~nf, None{}, part, ps) : Nat}