Analysis of xx-ph-02488192-2019_08_05_a-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.7..6..7..9..5......84...6..5.39....2..........7..3.1......69.6.1....5..7...1.. initial

Autosolve

position: 98.7..6..7..9..5......84.9.6..5.39....2....5.....7..3.1......69.6.1....5..7...1.. autosolve
Autosolve

Pair Reduction Variants

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000007

List of important HDP chains detected for H4,H8: 7..:

* DIS # H4: 7 # C2: 3,4 => CTR => C2: 6
* DIS # H4: 7 + C2: 6 # B2: 2 => CTR => B2: 3,4
* PRF # H4: 7 + C2: 6 + B2: 3,4 # B6: 1,4 => SOL
* STA # H4: 7 + C2: 6 + B2: 3,4 + B6: 1,4
* CNT   3 HDP CHAINS /   6 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..7..9..5......84...6..5.39....2..........7..3.1......69.6.1....5..7...1.. initial
98.7..6..7..9..5......84.9.6..5.39....2....5.....7..3.1......69.6.1....5..7...1.. autosolve

Classification

level: deep

Pairing Analysis

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* CONSTRAINT PAIRS (AUTO SOLVE)
A5,B5: 3.. / A5 = 3  =>  1 pairs (_) / B5 = 3  =>  1 pairs (_)
E1,F1: 5.. / E1 = 5  =>  1 pairs (_) / F1 = 5  =>  0 pairs (_)
C2,C3: 6.. / C2 = 6  =>  2 pairs (_) / C3 = 6  =>  1 pairs (_)
I5,I6: 6.. / I5 = 6  =>  1 pairs (_) / I6 = 6  =>  0 pairs (_)
C3,D3: 6.. / C3 = 6  =>  1 pairs (_) / D3 = 6  =>  2 pairs (_)
G3,I3: 7.. / G3 = 7  =>  1 pairs (_) / I3 = 7  =>  2 pairs (_)
B4,B5: 7.. / B4 = 7  =>  0 pairs (_) / B5 = 7  =>  3 pairs (_)
F7,F8: 7.. / F7 = 7  =>  0 pairs (_) / F8 = 7  =>  5 pairs (_)
F7,G7: 7.. / F7 = 7  =>  0 pairs (_) / G7 = 7  =>  5 pairs (_)
H4,H8: 7.. / H4 = 7  =>  5 pairs (_) / H8 = 7  =>  0 pairs (_)
H2,I2: 8.. / H2 = 8  =>  1 pairs (_) / I2 = 8  =>  0 pairs (_)
C8,B9: 9.. / C8 = 9  =>  0 pairs (_) / B9 = 9  =>  0 pairs (_)
C6,C8: 9.. / C6 = 9  =>  0 pairs (_) / C8 = 9  =>  0 pairs (_)
* DURATION: 0:00:09.425315  START: 02:50:48.954085  END: 02:50:58.379400 2020-11-16
* CP COUNT: (13)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
H4,H8: 7.. / H4 = 7 ==>  0 pairs (*) / H8 = 7  =>  0 pairs (X)
* DURATION: 0:00:14.788873  START: 02:50:58.380028  END: 02:51:13.168901 2020-11-16
* REASONING H4,H8: 7..
* DIS # H4: 7 # C2: 3,4 => CTR => C2: 6
* DIS # H4: 7 + C2: 6 # B2: 2 => CTR => B2: 3,4
* PRF # H4: 7 + C2: 6 + B2: 3,4 # B6: 1,4 => SOL
* STA # H4: 7 + C2: 6 + B2: 3,4 + B6: 1,4
* CNT   3 HDP CHAINS /   6 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

2488192;2019_08_05_a;PAQ;24;11.40;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for H4,H8: 7..:

* INC # H4: 7 # B2: 3,4 => UNS
* DIS # H4: 7 # C2: 3,4 => CTR => C2: 6
* INC # H4: 7 + C2: 6 # B2: 3,4 => UNS
* DIS # H4: 7 + C2: 6 # B2: 2 => CTR => B2: 3,4
* PRF # H4: 7 + C2: 6 + B2: 3,4 # B6: 1,4 => SOL
* STA # H4: 7 + C2: 6 + B2: 3,4 + B6: 1,4
* CNT   5 HDP CHAINS /   6 HYP OPENED