Analysis of xx-ph-00001432-L124-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: ...4..7.9....8..3...97....5..6...5.47.........1.....2.3...1......49..6...8...2... initial

Autosolve

position: ...4..7.9....89.3...97....5..6...5.47.........1.....2.3...1......49..6...8...2... autosolve
Autosolve

Pair Reduction Variants

Deep Pair Reduction

Deep Pair Reduction

Time used: 0:00:00.174215

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000019

List of important HDP chains detected for B2,B8: 7..:

* DIS # B8: 7 # A8: 1 => CTR => A8: 2,5
* DIS # B8: 7 + A8: 2,5 # F8: 3,5 => CTR => F8: 8
* PRF # B8: 7 + A8: 2,5 + F8: 8 # H9: 4,7 => SOL
* STA # B8: 7 + A8: 2,5 + F8: 8 + H9: 4,7
* CNT   3 HDP CHAINS /  17 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

...4..7.9....8..3...97....5..6...5.47.........1.....2.3...1......49..6...8...2... initial
...4..7.9....89.3...97....5..6...5.47.........1.....2.3...1......49..6...8...2... autosolve

Classification

level: deep

Pairing Analysis

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* PAIRS (2)
B7: 6,9
A9: 6,9

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* CONSTRAINT PAIRS (AUTO SOLVE)
A8,C9: 1.. / A8 = 1  =>  3 pairs (_) / C9 = 1  =>  4 pairs (_)
B5,A6: 4.. / B5 = 4  =>  2 pairs (_) / A6 = 4  =>  2 pairs (_)
F7,E9: 4.. / F7 = 4  =>  2 pairs (_) / E9 = 4  =>  2 pairs (_)
B7,A9: 6.. / B7 = 6  =>  2 pairs (_) / A9 = 6  =>  2 pairs (_)
B2,C2: 7.. / B2 = 7  =>  3 pairs (_) / C2 = 7  =>  7 pairs (_)
H4,I6: 7.. / H4 = 7  =>  2 pairs (_) / I6 = 7  =>  4 pairs (_)
B2,B8: 7.. / B2 = 7  =>  3 pairs (_) / B8 = 7  =>  7 pairs (_)
B7,A9: 9.. / B7 = 9  =>  2 pairs (_) / A9 = 9  =>  2 pairs (_)
* DURATION: 0:00:05.832627  START: 08:11:49.548165  END: 08:11:55.380792 2020-11-28
* CP COUNT: (8)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
B2,B8: 7.. / B2 = 7  =>  0 pairs (X) / B8 = 7 ==>  0 pairs (*)
* DURATION: 0:00:17.812347  START: 08:11:56.099270  END: 08:12:13.911617 2020-11-28
* REASONING B2,B8: 7..
* DIS # B8: 7 # A8: 1 => CTR => A8: 2,5
* DIS # B8: 7 + A8: 2,5 # F8: 3,5 => CTR => F8: 8
* PRF # B8: 7 + A8: 2,5 + F8: 8 # H9: 4,7 => SOL
* STA # B8: 7 + A8: 2,5 + F8: 8 + H9: 4,7
* CNT   3 HDP CHAINS /  17 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

1432;L124;elev;21;11.30;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for B2,B8: 7..:

* INC # B8: 7 # A8: 2,5 => UNS
* DIS # B8: 7 # A8: 1 => CTR => A8: 2,5
* INC # B8: 7 + A8: 2,5 # C1: 2,5 => UNS
* INC # B8: 7 + A8: 2,5 # C5: 2,5 => UNS
* INC # B8: 7 + A8: 2,5 # H7: 4,7 => UNS
* INC # B8: 7 + A8: 2,5 # H7: 5,8,9 => UNS
* INC # B8: 7 + A8: 2,5 # F6: 4,7 => UNS
* INC # B8: 7 + A8: 2,5 # F6: 3,5,6,8 => UNS
* DIS # B8: 7 + A8: 2,5 # F8: 3,5 => CTR => F8: 8
* INC # B8: 7 + A8: 2,5 + F8: 8 # D9: 3,5 => UNS
* INC # B8: 7 + A8: 2,5 + F8: 8 # D9: 3,5 => UNS
* INC # B8: 7 + A8: 2,5 + F8: 8 # D9: 6 => UNS
* INC # B8: 7 + A8: 2,5 + F8: 8 # E1: 3,5 => UNS
* INC # B8: 7 + A8: 2,5 + F8: 8 # E5: 3,5 => UNS
* INC # B8: 7 + A8: 2,5 + F8: 8 # E6: 3,5 => UNS
* PRF # B8: 7 + A8: 2,5 + F8: 8 # H9: 4,7 => SOL
* STA # B8: 7 + A8: 2,5 + F8: 8 + H9: 4,7
* CNT  16 HDP CHAINS /  17 HYP OPENED