..9.7...5..21..9..1...28....7...5..1..851.....5....3.......3..68........21.....87 box duplicate
6.159.....9..1............4.7.314..6.24.....5..3....1...6.....3...9.2.4......16.. column duplicate
.4.1..35.............2.5......4.89..26.....12.5.3....7..4...16.6....7....1..8..2. row duplicate
..9.287..8.6..4..5..3.....46.........2.71345.........23.....5..9..4..8.7..125.3.. unsolvable square
.9.3....1....8..46......8..4.5.6..3...32756...6..1.9.4..1......58..2....2....7.6. unsolvable box
....41....6.....2...2......32.6.........5..417.......2......23..48......5.1..2... unsolvable column
9..1....4.14.3.8....3....9....7.8..18....3..........3..21....7...9.4.5..5...16..3 unsolvable row


