Board #1: Pair 1: 4 segments. Pair 2: 3 segments. Pair 3: impossible. Board #2: Pair 1: 1 segments. Pair 2: 1 segments. Pair 3: 3 segments. Pair 4: 4 segments. Pair 5: 5 segments. Pair 6: impossible. Board #3: Pair 1: 5 segments. Pair 2: 38 segments. Board #4: Pair 1: 1 segments. Board #5: Pair 1: 1 segments. Pair 2: 3 segments. Pair 3: 1 segments. Board #6: Pair 1: 3 segments. Pair 2: 5 segments. Pair 3: 2 segments. Pair 4: 2 segments. Pair 5: 4 segments. Pair 6: 1 segments. Pair 7: 2 segments. Board #7: Pair 1: 3 segments. Pair 2: 3 segments. Pair 3: 5 segments. Pair 4: 5 segments. Pair 5: impossible. Pair 6: 1 segments. Pair 7: 2 segments. Pair 8: impossible. Pair 9: 5 segments. Pair 10: 6 segments. Pair 11: 1 segments. Pair 12: 1 segments. Pair 13: 7 segments. Board #8: Pair 1: 2 segments. Pair 2: 2 segments. Pair 3: 2 segments. Board #9: Pair 1: 77 segments. Board #10: Pair 1: 1732 segments.