Starting board: 0 4 0 0 7 0 0 0 9 8 5 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 4 3 9 0 0 0 0 0 2 0 0 0 0 5 6 0 0 5 0 0 0 0 1 0 0 2 0 5 0 0 0 0 0 9 0 0 0 8 3 4 0 0 0 7 0 9 0 0 6 0 Live cells: 58 Max freedoms: 6 Min freedoms: 1 Average: 3.71 Median: 4 Quartile: 3 Freedom counts: 1: 1 cells 2: 9 cells 3: 11 cells 4: 24 cells 5: 11 cells 6: 2 cells Range, 1-3 freedoms: 21; 5-7 freedoms: 13 Ratio, 5-7 to 1-3: 0.62 Natural solver starting(mode=constraints_only); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - - - - - 2 - - - - 5 6 - - 5 - - - - 1 - - 2 - 5 - - - - - 9 - - - 8 3 4 - - - 7 - 9 - - 6 - l3 actions: 0 Row pushes: 5 Col pushes: 2 Square pushes: 0 Total pushes: 7 Natural solver done; filled in 1 cells on this pass; board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - - - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - - - - - 9 - - - 8 3 4 - - - 7 - 9 - - 6 - Board assessment after first pass: Live cells: 57 Max freedoms: 6 Min freedoms: 2 Average: 3.63 Median: 4 Quartile: 3 Freedom counts: 1: 0 cells 2: 10 cells 3: 16 cells 4: 18 cells 5: 11 cells 6: 2 cells Range, 1-3 freedoms: 26; 5-7 freedoms: 13 Ratio, 5-7 to 1-3: 0.50 Natural solver starting(mode=partial_positive); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - - - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - - - - - 9 - - - 8 3 4 - - - 7 - 9 - - 6 - l3 actions: 0 Row pushes: 8 Col pushes: 6 Square pushes: 5 Total pushes: 19 Natural solver done; filled in 3 cells on this pass; board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - - - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Board assessment after second pass: Live cells: 54 Max freedoms: 6 Min freedoms: 2 Average: 3.46 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 11 cells 3: 18 cells 4: 15 cells 5: 9 cells 6: 1 cells Range, 1-3 freedoms: 29; 5-7 freedoms: 10 Ratio, 5-7 to 1-3: 0.34 Natural solver starting(mode=positive_with_multiset); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - - - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - l3 actions: 2 1 useful external multiset operations at size 2 L3 external record: 2/8 1 useful internal multiset operations at size 2 L3 internal record: 2/6 Row pushes: 7 Col pushes: 6 Square pushes: 3 Total pushes: 16 Natural solver done; filled in 1 cells on this pass; board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Board assessment after third pass: Live cells: 53 Max freedoms: 5 Min freedoms: 2 Average: 3.38 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 12 cells 3: 18 cells 4: 14 cells 5: 9 cells Range, 1-3 freedoms: 30; 5-7 freedoms: 9 Ratio, 5-7 to 1-3: 0.30 Natural solver starting(mode=esoteric1); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Row pushes: 8 Col pushes: 3 Square pushes: 0 Total pushes: 11 Object squash operations: 13 6 total squash operations Natural solver done; filled in 0 cells on this pass; board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Board assessment after fourth pass: Live cells: 53 Max freedoms: 5 Min freedoms: 2 Average: 3.38 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 12 cells 3: 18 cells 4: 14 cells 5: 9 cells Range, 1-3 freedoms: 30; 5-7 freedoms: 9 Ratio, 5-7 to 1-3: 0.30 Natural solver starting(mode=esoteric2); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Row pushes: 0 Col pushes: 0 Square pushes: 0 Total pushes: 0 Object squash operations: 13 Exterior multiset freedom zaps: 0 Interior multiset freedom zaps: 0 Natural solver done; filled in 0 cells on this pass; board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Board assessment after fifth pass: Live cells: 53 Max freedoms: 5 Min freedoms: 2 Average: 3.38 Median: 3 Quartile: 3 Freedom counts: 1: 0 cells 2: 12 cells 3: 18 cells 4: 14 cells 5: 9 cells Range, 1-3 freedoms: 30; 5-7 freedoms: 9 Ratio, 5-7 to 1-3: 0.30 Natural solver starting(mode=all_information); board: - 4 - - 7 - - - 9 8 5 - - - - - - - - - 1 - - - - - - - - - - 4 3 9 - 6 - - - 2 - - - - 5 6 - - 5 8 - - - 1 - - 2 - 5 - 1 9 - - 9 - - - 8 3 4 - - - 7 - 9 - 5 6 - Guessing at count 28, cell 0, with 2 possibilities Guessing at count 30, cell 6, with 2 possibilities Guessing at count 31, cell 3, with 2 possibilities ns_process_object: Jammed; entry 47 has no freedoms Backtracking to count 31: Stepped back by 31 cells Guessing again at entry 3 l3 actions: 1 1 useful external multiset operations at size 2 L3 external record: 2/2 Guessing at count 32, cell 5, with 2 possibilities Guessing at count 37, cell 11, with 2 possibilities ns_process_object: Jammed; entry 25 has no freedoms Backtracking to count 37: Stepped back by 35 cells Guessing again at entry 11 ns_process_object: Jammed; entry 62 has no freedoms Backtracking to count 37: Stepped back by 27 cells Backtracking to count 32: Stepped back by 32 cells Guessing again at entry 5 l3 actions: 1 1 useful external multiset operations at size 2 L3 external record: 2/7 Guessing at count 36, cell 11, with 2 possibilities Solved. Solution: 2 4 3 8 7 5 6 1 9 8 5 6 9 3 1 2 7 4 9 7 1 4 6 2 8 5 3 5 1 8 7 4 3 9 2 6 7 3 9 2 1 6 4 8 5 6 2 4 5 8 9 7 3 1 4 6 2 3 5 7 1 9 8 1 9 5 6 2 8 3 4 7 3 8 7 1 9 4 5 6 2 Guess steps: 9 Backtrack steps: 4 Max depth: 5 Final depth: 5 Backtracking to count 36: Stepped back by 45 cells Guessing again at entry 11 Looking for another solution. ns_process_object: Jammed; entry 66 has no freedoms Backtracking to count 36: Stepped back by 25 cells Backtracking to count 32: Stepped back by 29 cells Backtracking to count 31: Stepped back by 30 cells Backtracking to count 30: Stepped back by 31 cells Guessing again at entry 6 ns_process_object: Jammed; entry 75 has no freedoms Backtracking to count 30: Stepped back by 32 cells Backtracking to count 28: Stepped back by 34 cells Guessing again at entry 0 ns_process_object: Jammed; entry 63 has no freedoms Backtracking to count 28: Stepped back by 7 cells pop_state: Overpopped state stack! Grand totals: Row pushes: 28 Col pushes: 17 Square pushes: 8 Grand total pushes: 53 Solved cells at each level: 1:1, 2:3, 3:1, 4:0, 5:0 Guess steps: 12 Backtrack steps: 12 Max depth: 5 Final depth: 0 Solver level: 6 Raw rating: 9.17 Level adjustment: 9.60 Stars: 6 Done.