Starting board: 0 0 9 0 0 0 2 0 0 0 1 0 8 0 6 0 7 0 3 0 0 0 9 0 0 0 4 6 0 0 0 8 0 0 0 5 0 5 7 9 0 4 3 2 0 4 0 0 0 3 0 0 0 7 2 0 0 0 1 0 0 0 9 0 6 0 3 0 9 0 4 0 0 0 8 0 0 0 7 0 0 Live cells: 51 Max freedoms: 5 Min freedoms: 1 Average: 3.12 Median: 3 Quartile: 3 Freedom counts: 1: 3 cells 2: 6 cells 3: 25 cells 4: 16 cells 5: 1 cells Range, 1-3 freedoms: 34; 5-7 freedoms: 1 Ratio, 5-7 to 1-3: 0.03 Natural solver starting(mode=constraints_only); board: - - 9 - - - 2 - - - 1 - 8 - 6 - 7 - 3 - - - 9 - - - 4 6 - - - 8 - - - 5 - 5 7 9 - 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 - - - 9 - 6 - 3 - 9 - 4 - - - 8 - - - 7 - - l3 actions: 0 Row pushes: 8 Col pushes: 3 Square pushes: 0 Total pushes: 11 Natural solver done; filled in 4 cells on this pass; board: - - 9 - - - 2 - - 5 1 - 8 - 6 9 7 3 3 - - - 9 - - - 4 6 - - - 8 - - - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 - - - 9 - 6 - 3 - 9 - 4 - - - 8 - - - 7 - - Board assessment after first pass: Live cells: 47 Max freedoms: 4 Min freedoms: 2 Average: 2.98 Median: 3 Quartile: 2 Freedom counts: 1: 0 cells 2: 13 cells 3: 22 cells 4: 12 cells Range, 1-3 freedoms: 35; 5-7 freedoms: 0 Ratio, 5-7 to 1-3: 0.00 Natural solver starting(mode=partial_positive); board: - - 9 - - - 2 - - 5 1 - 8 - 6 9 7 3 3 - - - 9 - - - 4 6 - - - 8 - - - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 - - - 9 - 6 - 3 - 9 - 4 - - - 8 - - - 7 - - l3 actions: 0 Row pushes: 5 Col pushes: 6 Square pushes: 0 Total pushes: 11 Natural solver done; filled in 5 cells on this pass; board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - Board assessment after second pass: Live cells: 42 Max freedoms: 4 Min freedoms: 2 Average: 2.90 Median: 3 Quartile: 2 Freedom counts: 1: 0 cells 2: 12 cells 3: 22 cells 4: 8 cells Range, 1-3 freedoms: 34; 5-7 freedoms: 0 Ratio, 5-7 to 1-3: 0.00 Natural solver starting(mode=positive_with_multiset); board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - l3 actions: 0 Row pushes: 0 Col pushes: 0 Square pushes: 0 Total pushes: 0 Natural solver done; filled in 0 cells on this pass; board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - Board assessment after third pass: Live cells: 42 Max freedoms: 4 Min freedoms: 2 Average: 2.90 Median: 3 Quartile: 2 Freedom counts: 1: 0 cells 2: 12 cells 3: 22 cells 4: 8 cells Range, 1-3 freedoms: 34; 5-7 freedoms: 0 Ratio, 5-7 to 1-3: 0.00 Natural solver starting(mode=esoteric1); board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - l3 actions: 0 Row pushes: 1 Col pushes: 0 Square pushes: 0 Total pushes: 1 Object squash operations: 2 1 total squash operations Natural solver done; filled in 0 cells on this pass; board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - Board assessment after fourth pass: Live cells: 42 Max freedoms: 4 Min freedoms: 2 Average: 2.90 Median: 3 Quartile: 2 Freedom counts: 1: 0 cells 2: 12 cells 3: 22 cells 4: 8 cells Range, 1-3 freedoms: 34; 5-7 freedoms: 0 Ratio, 5-7 to 1-3: 0.00 Natural solver starting(mode=esoteric2); board: - - 9 - - 3 2 - - 5 1 - 8 - 6 9 7 3 3 - 6 - 9 - - - 4 6 - - - 8 - 4 - 5 - 5 7 9 6 4 3 2 - 4 - - - 3 - - - 7 2 - - - 1 8 - - 9 - 6 - 3 - 9 - 4 - 9 - 8 - - - 7 - - l3 actions: 1 1 useful internal multiset operations at size 2 L3 internal record: 2/5 Solved. Solution: 7 4 9 1 5 3 2 6 8 5 1 2 8 4 6 9 7 3 3 8 6 2 9 7 1 5 4 6 2 3 7 8 1 4 9 5 8 5 7 9 6 4 3 2 1 4 9 1 5 3 2 6 8 7 2 7 4 6 1 8 5 3 9 1 6 5 3 7 9 8 4 2 9 3 8 4 2 5 7 1 6 pop_state: Overpopped state stack! Row pushes: 25 Col pushes: 26 Square pushes: 20 Total pushes: 71 Object squash operations: 2 Exterior multiset freedom zaps: 3 1 productive irregular multiset hits of size 3 Irregular external record: 3/6 Interior multiset freedom zaps: 0 Natural solver done; we won. Grand totals: Row pushes: 39 Col pushes: 35 Square pushes: 20 Grand total pushes: 94 Solved cells at each level: 1:4, 2:5, 3:0, 4:0 Solver level: 5 Raw rating: 3.23 Level adjustment: 4.10 Stars: 4 Done.