Analysis of xx-ph-00974208-13_03-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.7..6..5...9..4..4...3...2.....5.1.5..2..8...9...2....5.8..2....1....7.....63.. initial

Autosolve

position: 98.7..6..5...9..4..4...3...2.....5.1.5..2..8...9...2....5.8..2....1....7.....63.. 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 I7,H8: 6..:

* DIS # H8: 6 # A6: 3,7 => CTR => A6: 1,4,6,8
* DIS # H8: 6 + A6: 1,4,6,8 # G7: 4,9 => CTR => G7: 1
* PRF # H8: 6 + A6: 1,4,6,8 + G7: 1 # D7: 4,9 => SOL
* STA # H8: 6 + A6: 1,4,6,8 + G7: 1 + D7: 4,9
* CNT   3 HDP CHAINS /  20 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..5...9..4..4...3...2.....5.1.5..2..8...9...2....5.8..2....1....7.....63.. initial
98.7..6..5...9..4..4...3...2.....5.1.5..2..8...9...2....5.8..2....1....7.....63.. autosolve

Classification

level: deep

Pairing Analysis

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* CONSTRAINT PAIRS (AUTO SOLVE)
G7,H9: 1.. / G7 = 1  =>  2 pairs (_) / H9 = 1  =>  2 pairs (_)
F8,D9: 2.. / F8 = 2  =>  1 pairs (_) / D9 = 2  =>  1 pairs (_)
D7,E8: 3.. / D7 = 3  =>  1 pairs (_) / E8 = 3  =>  1 pairs (_)
E1,F1: 4.. / E1 = 4  =>  2 pairs (_) / F1 = 4  =>  2 pairs (_)
I7,H8: 6.. / I7 = 6  =>  2 pairs (_) / H8 = 6  =>  3 pairs (_)
F7,E9: 7.. / F7 = 7  =>  1 pairs (_) / E9 = 7  =>  1 pairs (_)
C4,A6: 8.. / C4 = 8  =>  0 pairs (_) / A6 = 8  =>  0 pairs (_)
G8,I9: 8.. / G8 = 8  =>  1 pairs (_) / I9 = 8  =>  3 pairs (_)
* DURATION: 0:00:04.426080  START: 07:43:51.500547  END: 07:43:55.926627 2021-01-04
* CP COUNT: (8)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
I7,H8: 6.. / I7 = 6  =>  0 pairs (X) / H8 = 6 ==>  0 pairs (*)
* DURATION: 0:00:13.639079  START: 07:43:55.927112  END: 07:44:09.566191 2021-01-04
* REASONING I7,H8: 6..
* DIS # H8: 6 # A6: 3,7 => CTR => A6: 1,4,6,8
* DIS # H8: 6 + A6: 1,4,6,8 # G7: 4,9 => CTR => G7: 1
* PRF # H8: 6 + A6: 1,4,6,8 + G7: 1 # D7: 4,9 => SOL
* STA # H8: 6 + A6: 1,4,6,8 + G7: 1 + D7: 4,9
* CNT   3 HDP CHAINS /  20 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

974208;13_03;GP;24;11.30;11.30;10.70

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for I7,H8: 6..:

* INC # H8: 6 # H4: 3,7 => UNS
* INC # H8: 6 # H4: 9 => UNS
* DIS # H8: 6 # A6: 3,7 => CTR => A6: 1,4,6,8
* INC # H8: 6 + A6: 1,4,6,8 # B6: 3,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # E6: 3,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # H4: 3,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # H4: 9 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # B6: 3,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # E6: 3,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # F7: 4,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # F7: 9 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # A9: 4,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # C9: 4,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # E4: 4,7 => UNS
* INC # H8: 6 + A6: 1,4,6,8 # E6: 4,7 => UNS
* DIS # H8: 6 + A6: 1,4,6,8 # G7: 4,9 => CTR => G7: 1
* INC # H8: 6 + A6: 1,4,6,8 + G7: 1 # G8: 4,9 => UNS
* INC # H8: 6 + A6: 1,4,6,8 + G7: 1 # I9: 4,9 => UNS
* PRF # H8: 6 + A6: 1,4,6,8 + G7: 1 # D7: 4,9 => SOL
* STA # H8: 6 + A6: 1,4,6,8 + G7: 1 + D7: 4,9
* CNT  19 HDP CHAINS /  20 HYP OPENED