Analysis of xx-ph-00033187-2012_04-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.7.....6...8.9....5....4..9.8..6....3..4..2....1.....1..6.7.......2..5.......3. initial

Autosolve

position: 98.7.....6...8.9....5....4..9.8..6....3..4..2....1.....1..6.7.......2..5.......3. autosolve
Autosolve

Pair Reduction Variants

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000008

List of important HDP chains detected for F7,F9: 8..:

* DIS # F7: 8 # I9: 4,9 => CTR => I9: 1,6,8
* PRF # F9: 8 # H5: 5,9 => SOL
* STA # F9: 8 + H5: 5,9
* CNT   2 HDP CHAINS /  23 HYP OPENED

See Appendix: Full HDP Chains for full list of HDP chains.

Details

This sudoku is deep. Here is some information that may be helpful on how to proceed.

Positions

98.7.....6...8.9....5....4..9.8..6....3..4..2....1.....1..6.7.......2..5.......3. initial
98.7.....6...8.9....5....4..9.8..6....3..4..2....1.....1..6.7.......2..5.......3. autosolve

Classification

level: deep

Pairing Analysis

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* CONSTRAINT PAIRS (AUTO SOLVE)
E4,D6: 2.. / E4 = 2  =>  1 pairs (_) / D6 = 2  =>  0 pairs (_)
H7,G9: 2.. / H7 = 2  =>  0 pairs (_) / G9 = 2  =>  1 pairs (_)
E1,D2: 4.. / E1 = 4  =>  1 pairs (_) / D2 = 4  =>  0 pairs (_)
C1,E1: 4.. / C1 = 4  =>  0 pairs (_) / E1 = 4  =>  1 pairs (_)
H8,I9: 6.. / H8 = 6  =>  0 pairs (_) / I9 = 6  =>  1 pairs (_)
B5,D5: 6.. / B5 = 6  =>  1 pairs (_) / D5 = 6  =>  1 pairs (_)
H1,H8: 6.. / H1 = 6  =>  1 pairs (_) / H8 = 6  =>  0 pairs (_)
G3,I3: 8.. / G3 = 8  =>  2 pairs (_) / I3 = 8  =>  1 pairs (_)
F7,F9: 8.. / F7 = 8  =>  4 pairs (_) / F9 = 8  =>  1 pairs (_)
* DURATION: 0:00:05.245655  START: 07:44:41.187932  END: 07:44:46.433587 2020-12-12
* CP COUNT: (9)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
F7,F9: 8.. / F7 = 8 ==>  4 pairs (_) / F9 = 8 ==>  0 pairs (*)
* DURATION: 0:00:16.415427  START: 07:44:46.434203  END: 07:45:02.849630 2020-12-12
* REASONING F7,F9: 8..
* DIS # F7: 8 # I9: 4,9 => CTR => I9: 1,6,8
* PRF # F9: 8 # H5: 5,9 => SOL
* STA # F9: 8 + H5: 5,9
* CNT   2 HDP CHAINS /  23 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

33187;2012_04;GP;21;11.30;11.30;9.90

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for F7,F9: 8..:

* INC # F7: 8 # D2: 3,5 => UNS
* INC # F7: 8 # D6: 3,5 => UNS
* INC # F7: 8 # C7: 2,9 => UNS
* INC # F7: 8 # C7: 4 => UNS
* DIS # F7: 8 # I9: 4,9 => CTR => I9: 1,6,8
* INC # F7: 8 + I9: 1,6,8 # C7: 4,9 => UNS
* INC # F7: 8 + I9: 1,6,8 # C7: 2 => UNS
* INC # F7: 8 + I9: 1,6,8 # I6: 4,9 => UNS
* INC # F7: 8 + I9: 1,6,8 # I6: 3,7,8 => UNS
* INC # F7: 8 + I9: 1,6,8 # D2: 3,5 => UNS
* INC # F7: 8 + I9: 1,6,8 # D6: 3,5 => UNS
* INC # F7: 8 + I9: 1,6,8 # C7: 2,9 => UNS
* INC # F7: 8 + I9: 1,6,8 # C7: 4 => UNS
* INC # F7: 8 + I9: 1,6,8 # C7: 4,9 => UNS
* INC # F7: 8 + I9: 1,6,8 # C7: 2 => UNS
* INC # F7: 8 + I9: 1,6,8 # I6: 4,9 => UNS
* INC # F7: 8 + I9: 1,6,8 # I6: 3,7,8 => UNS
* INC # F7: 8 + I9: 1,6,8 => UNS
* INC # F9: 8 # D5: 5,9 => UNS
* INC # F9: 8 # D6: 5,9 => UNS
* INC # F9: 8 # F6: 5,9 => UNS
* PRF # F9: 8 # H5: 5,9 => SOL
* STA # F9: 8 + H5: 5,9
* CNT  22 HDP CHAINS /  23 HYP OPENED