type-113 tiling of (10,14) with 12 left stones; accepted as stones-and-bones tiling: True (ok)
last tile removed          rejected=True (uncovered cells: 3)
wrong benzel (10,17)       rejected=True (uncovered cells: 12)
first tile shifted         rejected=True (cell covered twice (-6, 5, 2))
two tiles mixed            rejected=True (not a stone or bone: ((-4, 0, 5), (-3, -1, 5), (-4, 4, 1)))
tiling with left stones    rejected=True (forbidden tile L)
NEG RESULT: all corrupted inputs rejected
