Starting board: 0 0 0 0 0 0 0 0 0 0 0 3 8 0 1 7 0 0 0 6 0 3 0 0 0 9 0 0 5 2 9 0 6 8 7 0 0 0 0 0 0 0 0 0 0 0 9 6 0 0 7 3 0 0 0 4 0 6 0 2 0 5 0 0 0 8 1 0 9 6 0 0 0 0 0 0 0 0 0 0 0 Live cells: 56 Max freedoms: 7 Min freedoms: 1 Average: 4.12 Median: 4 Quartile: 3 Freedom counts: 1: 1 cells 2: 4 cells 3: 13 cells 4: 20 cells 5: 9 cells 6: 5 cells 7: 4 cells Range, 1-3 freedoms: 18; 5-7 freedoms: 18 Ratio, 5-7 to 1-3: 1.00 Natural solver starting(mode=constraints_only); board: - - - - - - - - - - - 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - - - 8 1 - 9 6 - - - - - - - - - - - l3 actions: 0 Row pushes: 6 Col pushes: 2 Square pushes: 0 Total pushes: 8 Natural solver done; filled in 1 cells on this pass; board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - - - 8 1 - 9 6 - - - - - - - - - - - Board assessment after first pass: Live cells: 55 Max freedoms: 7 Min freedoms: 2 Average: 4.02 Median: 4 Quartile: 3 Freedom counts: 1: 0 cells 2: 6 cells 3: 15 cells 4: 17 cells 5: 9 cells 6: 5 cells 7: 3 cells Range, 1-3 freedoms: 21; 5-7 freedoms: 17 Ratio, 5-7 to 1-3: 0.81 Natural solver starting(mode=partial_positive); board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - - - 8 1 - 9 6 - - - - - - - - - - - l3 actions: 0 Row pushes: 8 Col pushes: 9 Square pushes: 5 Total pushes: 22 Natural solver done; filled in 4 cells on this pass; board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - 2 - 8 1 5 9 6 - - 6 - 5 - - - - - - Board assessment after second pass: Live cells: 51 Max freedoms: 7 Min freedoms: 2 Average: 3.73 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 8 cells 3: 18 cells 4: 12 cells 5: 8 cells 6: 3 cells 7: 2 cells Range, 1-3 freedoms: 26; 5-7 freedoms: 13 Ratio, 5-7 to 1-3: 0.50 Natural solver starting(mode=positive_with_multiset); board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - 2 - 8 1 5 9 6 - - 6 - 5 - - - - - - l3 actions: 3 3 useful internal multiset operations at size 2 L3 internal record: 2/8, 2/4, 2/6 Row pushes: 6 Col pushes: 4 Square pushes: 1 Total pushes: 11 Natural solver done; filled in 0 cells on this pass; board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - 2 - 8 1 5 9 6 - - 6 - 5 - - - - - - Board assessment after third pass: Live cells: 51 Max freedoms: 7 Min freedoms: 2 Average: 3.73 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 8 cells 3: 18 cells 4: 12 cells 5: 8 cells 6: 3 cells 7: 2 cells Range, 1-3 freedoms: 26; 5-7 freedoms: 13 Ratio, 5-7 to 1-3: 0.50 Natural solver starting(mode=esoteric1); board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 - 5 - 2 - 8 1 5 9 6 - - 6 - 5 - - - - - - Row pushes: 9 Col pushes: 4 Square pushes: 3 Total pushes: 16 Object squash operations: 5 2 total squash operations Natural solver done; filled in 2 cells on this pass; board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 1 5 - 2 - 8 1 5 9 6 - - 6 1 5 - - - - - - Board assessment after fourth pass: Live cells: 49 Max freedoms: 7 Min freedoms: 2 Average: 3.55 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 9 cells 3: 20 cells 4: 10 cells 5: 5 cells 6: 4 cells 7: 1 cells Range, 1-3 freedoms: 29; 5-7 freedoms: 10 Ratio, 5-7 to 1-3: 0.34 Natural solver starting(mode=esoteric2); board: - - - - - - - - - - 2 3 8 - 1 7 - - - 6 - 3 - - - 9 - - 5 2 9 - 6 8 7 - - - - - - - - - - - 9 6 - - 7 3 - - - 4 - 6 - 2 1 5 - 2 - 8 1 5 9 6 - - 6 1 5 - - - - - - l3 actions: 1 1 useful external multiset operations at size 2 L3 external record: 2/6 1 useful internal multiset operations at size 2 L3 internal record: 2/6 Solved. Solution: 9 8 7 2 6 4 5 1 3 5 2 3 8 9 1 7 4 6 1 6 4 3 7 5 2 9 8 4 5 2 9 3 6 8 7 1 7 3 1 5 2 8 4 6 9 8 9 6 4 1 7 3 2 5 3 4 9 6 8 2 1 5 7 2 7 8 1 5 9 6 3 4 6 1 5 7 4 3 9 8 2 pop_state: Overpopped state stack! Row pushes: 26 Col pushes: 25 Square pushes: 20 Total pushes: 71 Object squash operations: 9 2 total squash operations Exterior multiset freedom zaps: 18 1 productive irregular multiset hits of size 4 1 productive irregular multiset hits of size 5 Irregular external record: 4/7, 5/9 Interior multiset freedom zaps: 0 Natural solver done; we won. Grand totals: Row pushes: 55 Col pushes: 44 Square pushes: 29 Grand total pushes: 128 Solved cells at each level: 1:1, 2:4, 3:0, 4:2 Solver level: 5 Raw rating: 9.00 Level adjustment: 10.50 Stars: 6 Done.