Analysis of xx-ph-00038665-12_07-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.7.....7...6.9....5..4...6.........9..8.6.........32.7..1.8....3.....4.....2.5. initial

Autosolve

position: 98.7.....7...6.9....5..4...6.........9..8.6.........32.7..1.8....3.....4.....2.5. autosolve
Autosolve

Pair Reduction Variants

Deep Pair Reduction

Deep Pair Reduction

Time used: 0:00:00.153787

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000015

List of important HDP chains detected for D3,E3: 9..:

* DIS # D3: 9 # G3: 2,3 => CTR => G3: 1,7
* DIS # D3: 9 + G3: 1,7 # I3: 1,7 => CTR => I3: 3,6,8
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 # G4: 1,7 => CTR => G4: 4,5
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 # G6: 1,7 => CTR => G6: 4,5
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 # H3: 1,7 => CTR => H3: 2,6,8
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 + H3: 2,6,8 => CTR => D3: 1,2,3,8
* STA D3: 1,2,3,8
* CNT   6 HDP CHAINS /  39 HYP OPENED

List of important HDP chains detected for C6,C9: 8..:

* DIS # C9: 8 # H8: 2,6 => CTR => H8: 1,7,9
* DIS # C9: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => C9: 1,4,6,9
* STA C9: 1,4,6,9
* CNT   4 HDP CHAINS /  10 HYP OPENED

List of important HDP chains detected for A6,C6: 8..:

* DIS # A6: 8 # H8: 2,6 => CTR => H8: 1,7,9
* DIS # A6: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => A6: 1,4,5
* STA A6: 1,4,5
* CNT   4 HDP CHAINS /  10 HYP OPENED

List of important HDP chains detected for C1,B3: 6..:

* DIS # B3: 6 # D7: 6,9 => CTR => D7: 3,4,5
* PRF # B3: 6 + D7: 3,4,5 # F7: 6,9 => SOL
* STA # B3: 6 + D7: 3,4,5 + F7: 6,9
* 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

98.7.....7...6.9....5..4...6.........9..8.6.........32.7..1.8....3.....4.....2.5. initial
98.7.....7...6.9....5..4...6.........9..8.6.........32.7..1.8....3.....4.....2.5. autosolve

Classification

level: deep

Pairing Analysis

--------------------------------------------------
* PAIRS (2)
H4: 8,9
I4: 8,9

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
B4,A5: 3.. / B4 = 3  =>  3 pairs (_) / A5 = 3  =>  3 pairs (_)
A3,A5: 3.. / A3 = 3  =>  3 pairs (_) / A5 = 3  =>  3 pairs (_)
C1,B3: 6.. / C1 = 6  =>  2 pairs (_) / B3 = 6  =>  5 pairs (_)
D6,F6: 6.. / D6 = 6  =>  2 pairs (_) / F6 = 6  =>  3 pairs (_)
A6,C6: 8.. / A6 = 8  =>  5 pairs (_) / C6 = 8  =>  2 pairs (_)
H4,I4: 8.. / H4 = 8  =>  1 pairs (_) / I4 = 8  =>  1 pairs (_)
C6,C9: 8.. / C6 = 8  =>  2 pairs (_) / C9 = 8  =>  5 pairs (_)
F2,F8: 8.. / F2 = 8  =>  2 pairs (_) / F8 = 8  =>  4 pairs (_)
D3,E3: 9.. / D3 = 9  =>  3 pairs (_) / E3 = 9  =>  5 pairs (_)
H4,I4: 9.. / H4 = 9  =>  1 pairs (_) / I4 = 9  =>  1 pairs (_)
C7,C9: 9.. / C7 = 9  =>  4 pairs (_) / C9 = 9  =>  2 pairs (_)
* DURATION: 0:00:07.258092  START: 15:38:39.332981  END: 15:38:46.591073 2020-12-17
* CP COUNT: (11)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
D3,E3: 9.. / D3 = 9 ==>  0 pairs (X) / E3 = 9 ==>  5 pairs (_)
C6,C9: 8.. / C6 = 8  =>  2 pairs (_) / C9 = 8 ==>  0 pairs (X)
A6,C6: 8.. / A6 = 8 ==>  0 pairs (X) / C6 = 8  =>  2 pairs (_)
C1,B3: 6.. / C1 = 6  =>  0 pairs (X) / B3 = 6 ==>  0 pairs (*)
* DURATION: 0:00:41.855018  START: 15:38:47.281228  END: 15:39:29.136246 2020-12-17
* REASONING D3,E3: 9..
* DIS # D3: 9 # G3: 2,3 => CTR => G3: 1,7
* DIS # D3: 9 + G3: 1,7 # I3: 1,7 => CTR => I3: 3,6,8
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 # G4: 1,7 => CTR => G4: 4,5
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 # G6: 1,7 => CTR => G6: 4,5
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 # H3: 1,7 => CTR => H3: 2,6,8
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 + H3: 2,6,8 => CTR => D3: 1,2,3,8
* STA D3: 1,2,3,8
* CNT   6 HDP CHAINS /  39 HYP OPENED
* REASONING C6,C9: 8..
* DIS # C9: 8 # H8: 2,6 => CTR => H8: 1,7,9
* DIS # C9: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => C9: 1,4,6,9
* STA C9: 1,4,6,9
* CNT   4 HDP CHAINS /  10 HYP OPENED
* REASONING A6,C6: 8..
* DIS # A6: 8 # H8: 2,6 => CTR => H8: 1,7,9
* DIS # A6: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => A6: 1,4,5
* STA A6: 1,4,5
* CNT   4 HDP CHAINS /  10 HYP OPENED
* REASONING C1,B3: 6..
* DIS # B3: 6 # D7: 6,9 => CTR => D7: 3,4,5
* PRF # B3: 6 + D7: 3,4,5 # F7: 6,9 => SOL
* STA # B3: 6 + D7: 3,4,5 + F7: 6,9
* CNT   2 HDP CHAINS /   3 HYP OPENED
* DCP COUNT: (4)
* SOLUTION FOUND

Header Info

38665;12_07;GP;21;11.30;11.30;2.60

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for D3,E3: 9..:

* INC # E3: 9 # D7: 6,9 => UNS
* INC # E3: 9 # D8: 6,9 => UNS
* INC # E3: 9 # D9: 6,9 => UNS
* INC # E3: 9 # F7: 6,9 => UNS
* INC # E3: 9 # F8: 6,9 => UNS
* INC # E3: 9 # F8: 5,7 => UNS
* INC # E3: 9 # F8: 6,8,9 => UNS
* INC # E3: 9 # E4: 5,7 => UNS
* INC # E3: 9 # E6: 5,7 => UNS
* INC # E3: 9 => UNS
* INC # D3: 9 # E1: 2,3 => UNS
* INC # D3: 9 # D2: 2,3 => UNS
* INC # D3: 9 # A3: 2,3 => UNS
* INC # D3: 9 # B3: 2,3 => UNS
* DIS # D3: 9 # G3: 2,3 => CTR => G3: 1,7
* INC # D3: 9 + G3: 1,7 # E4: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # E4: 4,5,7 => UNS
* INC # D3: 9 + G3: 1,7 # E1: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # D2: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # A3: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # B3: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # E4: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # E4: 4,5,7 => UNS
* INC # D3: 9 + G3: 1,7 # E1: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # D2: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # A3: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # B3: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # E4: 2,3 => UNS
* INC # D3: 9 + G3: 1,7 # E4: 4,5,7 => UNS
* INC # D3: 9 + G3: 1,7 # H3: 1,7 => UNS
* DIS # D3: 9 + G3: 1,7 # I3: 1,7 => CTR => I3: 3,6,8
* INC # D3: 9 + G3: 1,7 + I3: 3,6,8 # H3: 1,7 => UNS
* INC # D3: 9 + G3: 1,7 + I3: 3,6,8 # H3: 2,6,8 => UNS
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 # G4: 1,7 => CTR => G4: 4,5
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 # G6: 1,7 => CTR => G6: 4,5
* INC # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 # G8: 1,7 => UNS
* INC # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 # G9: 1,7 => UNS
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 # H3: 1,7 => CTR => H3: 2,6,8
* DIS # D3: 9 + G3: 1,7 + I3: 3,6,8 + G4: 4,5 + G6: 4,5 + H3: 2,6,8 => CTR => D3: 1,2,3,8
* STA D3: 1,2,3,8
* CNT  39 HDP CHAINS /  39 HYP OPENED

Full list of HDP chains traversed for C6,C9: 8..:

* INC # C9: 8 # B9: 1,4 => UNS
* INC # C9: 8 # B9: 6 => UNS
* INC # C9: 8 # A5: 1,4 => UNS
* INC # C9: 8 # A5: 2,3,5 => UNS
* DIS # C9: 8 # H8: 2,6 => CTR => H8: 1,7,9
* INC # C9: 8 + H8: 1,7,9 # H3: 2,6 => UNS
* DIS # C9: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # C9: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => C9: 1,4,6,9
* INC C9: 1,4,6,9 # C6: 8 => UNS
* STA C9: 1,4,6,9
* CNT  10 HDP CHAINS /  10 HYP OPENED

Full list of HDP chains traversed for A6,C6: 8..:

* INC # A6: 8 # B9: 1,4 => UNS
* INC # A6: 8 # B9: 6 => UNS
* INC # A6: 8 # A5: 1,4 => UNS
* INC # A6: 8 # A5: 2,3,5 => UNS
* DIS # A6: 8 # H8: 2,6 => CTR => H8: 1,7,9
* INC # A6: 8 + H8: 1,7,9 # H3: 2,6 => UNS
* DIS # A6: 8 + H8: 1,7,9 # H3: 1,7,8 => CTR => H3: 2,6
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 # I9: 3,6 => CTR => I9: 1,7,9
* DIS # A6: 8 + H8: 1,7,9 + H3: 2,6 + I9: 1,7,9 => CTR => A6: 1,4,5
* INC A6: 1,4,5 # C6: 8 => UNS
* STA A6: 1,4,5
* CNT  10 HDP CHAINS /  10 HYP OPENED

Full list of HDP chains traversed for C1,B3: 6..:

* DIS # B3: 6 # D7: 6,9 => CTR => D7: 3,4,5
* PRF # B3: 6 + D7: 3,4,5 # F7: 6,9 => SOL
* STA # B3: 6 + D7: 3,4,5 + F7: 6,9
* CNT   2 HDP CHAINS /   3 HYP OPENED