Analysis of xx-ph-00662995-12_12_19-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: ........1.....2.3...4.5.6...3.....27.4....8..6...8.9...7...1...4.86.....9..54.... initial

Autosolve

position: ........1.....2.3...4.5.6..83.....27.4....8..6...8.9...7...1...4.86.....9..54.... autosolve
Autosolve

Pair Reduction Variants

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000006

List of important HDP chains detected for C4,C5: 9..:

* DIS # C4: 9 # D6: 1,4 => CTR => D6: 2,3,7
* PRF # C4: 9 + D6: 2,3,7 # G4: 1,4 => SOL
* STA # C4: 9 + D6: 2,3,7 + G4: 1,4
* CNT   2 HDP CHAINS /   3 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

........1.....2.3...4.5.6...3.....27.4....8..6...8.9...7...1...4.86.....9..54.... initial
........1.....2.3...4.5.6..83.....27.4....8..6...8.9...7...1...4.86.....9..54.... autosolve

Classification

level: deep

Pairing Analysis

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* CONSTRAINT PAIRS (AUTO SOLVE)
G1,I3: 2.. / G1 = 2  =>  1 pairs (_) / I3 = 2  =>  2 pairs (_)
I5,I6: 3.. / I5 = 3  =>  1 pairs (_) / I6 = 3  =>  1 pairs (_)
E4,F4: 6.. / E4 = 6  =>  1 pairs (_) / F4 = 6  =>  1 pairs (_)
H5,I5: 6.. / H5 = 6  =>  1 pairs (_) / I5 = 6  =>  2 pairs (_)
F1,F4: 6.. / F1 = 6  =>  1 pairs (_) / F4 = 6  =>  1 pairs (_)
D7,F9: 8.. / D7 = 8  =>  1 pairs (_) / F9 = 8  =>  1 pairs (_)
C4,C5: 9.. / C4 = 9  =>  2 pairs (_) / C5 = 9  =>  1 pairs (_)
* DURATION: 0:00:04.961440  START: 01:12:13.384495  END: 01:12:18.345935 2020-10-30
* CP COUNT: (7)
* INCONCLUSIVE

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* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
C4,C5: 9.. / C4 = 9 ==>  0 pairs (*) / C5 = 9  =>  0 pairs (X)
* DURATION: 0:00:08.289992  START: 01:12:18.346617  END: 01:12:26.636609 2020-10-30
* REASONING C4,C5: 9..
* DIS # C4: 9 # D6: 1,4 => CTR => D6: 2,3,7
* PRF # C4: 9 + D6: 2,3,7 # G4: 1,4 => SOL
* STA # C4: 9 + D6: 2,3,7 + G4: 1,4
* CNT   2 HDP CHAINS /   3 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

662995;12_12_19;dob;22;11.40;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for C4,C5: 9..:

* DIS # C4: 9 # D6: 1,4 => CTR => D6: 2,3,7
* PRF # C4: 9 + D6: 2,3,7 # G4: 1,4 => SOL
* STA # C4: 9 + D6: 2,3,7 + G4: 1,4
* CNT   2 HDP CHAINS /   3 HYP OPENED