Analysis of xx-ph-00000745-950-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: ...4...8.....8...6.9...31...7...1...3.....5....68....25....79....29...4..3....... initial

Autosolve

position: ...4...8.....8...6.9...31...7...1...3.....5....68....25....79....29...4..3....... autosolve
Autosolve

Pair Reduction Variants

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000016

List of important HDP chains detected for G2,I3: 4..:

* DIS # G2: 4 # C4: 4,8 => CTR => C4: 5,9
* DIS # G2: 4 + C4: 5,9 # C9: 4,8 => CTR => C9: 1,7,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 # I1: 5,7 => CTR => I1: 3,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 # H3: 5,7 => CTR => H3: 2
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # I8: 5,7 => CTR => I8: 1,3,8
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # H6: 3,7 => CTR => H6: 1,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 + H6: 1,9 => CTR => G2: 2,3,7
* STA G2: 2,3,7
* CNT   7 HDP CHAINS /  23 HYP OPENED

List of important HDP chains detected for A4,B5: 2..:

* DIS # B5: 2 # B7: 1,4 => CTR => B7: 6,8
* CNT   1 HDP CHAINS /  29 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...8.....8...6.9...31...7...1...3.....5....68....25....79....29...4..3....... initial
...4...8.....8...6.9...31...7...1...3.....5....68....25....79....29...4..3....... autosolve

Classification

level: deep

Pairing Analysis

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
E1,D2: 1.. / E1 = 1  =>  1 pairs (_) / D2 = 1  =>  0 pairs (_)
A4,B5: 2.. / A4 = 2  =>  0 pairs (_) / B5 = 2  =>  2 pairs (_)
C1,C2: 3.. / C1 = 3  =>  1 pairs (_) / C2 = 3  =>  0 pairs (_)
D4,D7: 3.. / D4 = 3  =>  1 pairs (_) / D7 = 3  =>  1 pairs (_)
G2,I3: 4.. / G2 = 4  =>  4 pairs (_) / I3 = 4  =>  0 pairs (_)
C4,B6: 5.. / C4 = 5  =>  1 pairs (_) / B6 = 5  =>  1 pairs (_)
A3,C3: 8.. / A3 = 8  =>  0 pairs (_) / C3 = 8  =>  3 pairs (_)
F8,F9: 8.. / F8 = 8  =>  1 pairs (_) / F9 = 8  =>  1 pairs (_)
I1,H2: 9.. / I1 = 9  =>  1 pairs (_) / H2 = 9  =>  2 pairs (_)
A9,C9: 9.. / A9 = 9  =>  1 pairs (_) / C9 = 9  =>  0 pairs (_)
F2,H2: 9.. / F2 = 9  =>  1 pairs (_) / H2 = 9  =>  2 pairs (_)
* DURATION: 0:00:08.824937  START: 20:17:38.330106  END: 20:17:47.155043 2020-11-21
* CP COUNT: (11)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
G2,I3: 4.. / G2 = 4 ==>  0 pairs (X) / I3 = 4  =>  0 pairs (_)
A3,C3: 8.. / A3 = 8 ==>  0 pairs (_) / C3 = 8 ==>  3 pairs (_)
F2,H2: 9.. / F2 = 9 ==>  1 pairs (_) / H2 = 9 ==>  2 pairs (_)
I1,H2: 9.. / I1 = 9 ==>  1 pairs (_) / H2 = 9 ==>  2 pairs (_)
A4,B5: 2.. / A4 = 2 ==>  0 pairs (_) / B5 = 2 ==>  3 pairs (_)
F8,F9: 8.. / F8 = 8 ==>  1 pairs (_) / F9 = 8 ==>  1 pairs (_)
C4,B6: 5.. / C4 = 5 ==>  1 pairs (_) / B6 = 5 ==>  1 pairs (_)
D4,D7: 3.. / D4 = 3 ==>  1 pairs (_) / D7 = 3 ==>  1 pairs (_)
A9,C9: 9.. / A9 = 9 ==>  1 pairs (_) / C9 = 9 ==>  0 pairs (_)
C1,C2: 3.. / C1 = 3 ==>  1 pairs (_) / C2 = 3 ==>  0 pairs (_)
E1,D2: 1.. / E1 = 1 ==>  1 pairs (_) / D2 = 1 ==>  0 pairs (_)
* DURATION: 0:01:41.406306  START: 20:17:47.155961  END: 20:19:28.562267 2020-11-21
* REASONING G2,I3: 4..
* DIS # G2: 4 # C4: 4,8 => CTR => C4: 5,9
* DIS # G2: 4 + C4: 5,9 # C9: 4,8 => CTR => C9: 1,7,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 # I1: 5,7 => CTR => I1: 3,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 # H3: 5,7 => CTR => H3: 2
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # I8: 5,7 => CTR => I8: 1,3,8
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # H6: 3,7 => CTR => H6: 1,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 + H6: 1,9 => CTR => G2: 2,3,7
* STA G2: 2,3,7
* CNT   7 HDP CHAINS /  23 HYP OPENED
* REASONING A4,B5: 2..
* DIS # B5: 2 # B7: 1,4 => CTR => B7: 6,8
* CNT   1 HDP CHAINS /  29 HYP OPENED
* DCP COUNT: (11)
* CLUE FOUND

Header Info

745;950;elev;21;11.30;11.30;10.00

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for G2,I3: 4..:

* INC # G2: 4 # A4: 4,8 => UNS
* INC # G2: 4 # A9: 4,8 => UNS
* DIS # G2: 4 # C4: 4,8 => CTR => C4: 5,9
* INC # G2: 4 + C4: 5,9 # C5: 4,8 => UNS
* INC # G2: 4 + C4: 5,9 # C7: 4,8 => UNS
* DIS # G2: 4 + C4: 5,9 # C9: 4,8 => CTR => C9: 1,7,9
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 # C5: 4,8 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 # C7: 4,8 => UNS
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 # I1: 5,7 => CTR => I1: 3,9
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 # H2: 5,7 => UNS
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 # H3: 5,7 => CTR => H3: 2
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # H2: 5,7 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # H2: 3,9 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # D3: 5,7 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # E3: 5,7 => UNS
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 # I8: 5,7 => CTR => I8: 1,3,8
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # H2: 5,7 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # H2: 3 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # D3: 5,7 => UNS
* INC # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # D3: 6 => UNS
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 # H6: 3,7 => CTR => H6: 1,9
* DIS # G2: 4 + C4: 5,9 + C9: 1,7,9 + I1: 3,9 + H3: 2 + I8: 1,3,8 + H6: 1,9 => CTR => G2: 2,3,7
* INC G2: 2,3,7 # I3: 4 => UNS
* STA G2: 2,3,7
* CNT  23 HDP CHAINS /  23 HYP OPENED

Full list of HDP chains traversed for A3,C3: 8..:

* INC # C3: 8 # B7: 1,4 => UNS
* INC # C3: 8 # A9: 1,4 => UNS
* INC # C3: 8 # C9: 1,4 => UNS
* INC # C3: 8 # E7: 1,4 => UNS
* INC # C3: 8 # E7: 2,3,6 => UNS
* INC # C3: 8 # C2: 1,4 => UNS
* INC # C3: 8 # C5: 1,4 => UNS
* INC # C3: 8 => UNS
* INC # A3: 8 => UNS
* CNT   9 HDP CHAINS /   9 HYP OPENED

Full list of HDP chains traversed for F2,H2: 9..:

* INC # H2: 9 # E1: 2,5 => UNS
* INC # H2: 9 # F1: 2,5 => UNS
* INC # H2: 9 # D2: 2,5 => UNS
* INC # H2: 9 # D3: 2,5 => UNS
* INC # H2: 9 # E3: 2,5 => UNS
* INC # H2: 9 # B2: 2,5 => UNS
* INC # H2: 9 # B2: 1,4 => UNS
* INC # H2: 9 # F9: 2,5 => UNS
* INC # H2: 9 # F9: 4,6,8 => UNS
* INC # H2: 9 # G4: 3,6 => UNS
* INC # H2: 9 # G4: 4,8 => UNS
* INC # H2: 9 # D4: 3,6 => UNS
* INC # H2: 9 # E4: 3,6 => UNS
* INC # H2: 9 # H7: 3,6 => UNS
* INC # H2: 9 # H7: 1,2 => UNS
* INC # H2: 9 => UNS
* INC # F2: 9 # E4: 4,5 => UNS
* INC # F2: 9 # E6: 4,5 => UNS
* INC # F2: 9 # B6: 4,5 => UNS
* INC # F2: 9 # B6: 1 => UNS
* INC # F2: 9 # F9: 4,5 => UNS
* INC # F2: 9 # F9: 2,6,8 => UNS
* INC # F2: 9 => UNS
* CNT  23 HDP CHAINS /  23 HYP OPENED

Full list of HDP chains traversed for I1,H2: 9..:

* INC # H2: 9 # E1: 2,5 => UNS
* INC # H2: 9 # F1: 2,5 => UNS
* INC # H2: 9 # D2: 2,5 => UNS
* INC # H2: 9 # D3: 2,5 => UNS
* INC # H2: 9 # E3: 2,5 => UNS
* INC # H2: 9 # B2: 2,5 => UNS
* INC # H2: 9 # B2: 1,4 => UNS
* INC # H2: 9 # F9: 2,5 => UNS
* INC # H2: 9 # F9: 4,6,8 => UNS
* INC # H2: 9 # G4: 3,6 => UNS
* INC # H2: 9 # G4: 4,8 => UNS
* INC # H2: 9 # D4: 3,6 => UNS
* INC # H2: 9 # E4: 3,6 => UNS
* INC # H2: 9 # H7: 3,6 => UNS
* INC # H2: 9 # H7: 1,2 => UNS
* INC # H2: 9 => UNS
* INC # I1: 9 # E4: 4,5 => UNS
* INC # I1: 9 # E6: 4,5 => UNS
* INC # I1: 9 # B6: 4,5 => UNS
* INC # I1: 9 # B6: 1 => UNS
* INC # I1: 9 # F9: 4,5 => UNS
* INC # I1: 9 # F9: 2,6,8 => UNS
* INC # I1: 9 => UNS
* CNT  23 HDP CHAINS /  23 HYP OPENED

Full list of HDP chains traversed for A4,B5: 2..:

* INC # B5: 2 # E5: 6,7 => UNS
* INC # B5: 2 # E5: 4,9 => UNS
* INC # B5: 2 # H5: 6,7 => UNS
* INC # B5: 2 # H5: 1,9 => UNS
* INC # B5: 2 # D3: 6,7 => UNS
* INC # B5: 2 # D3: 2,5 => UNS
* DIS # B5: 2 # B7: 1,4 => CTR => B7: 6,8
* INC # B5: 2 + B7: 6,8 # A9: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # C9: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # E7: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # E7: 2,3,6 => UNS
* INC # B5: 2 + B7: 6,8 # C2: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # C5: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # E5: 6,7 => UNS
* INC # B5: 2 + B7: 6,8 # E5: 4,9 => UNS
* INC # B5: 2 + B7: 6,8 # H5: 6,7 => UNS
* INC # B5: 2 + B7: 6,8 # H5: 1,9 => UNS
* INC # B5: 2 + B7: 6,8 # D3: 6,7 => UNS
* INC # B5: 2 + B7: 6,8 # D3: 2,5 => UNS
* INC # B5: 2 + B7: 6,8 # B8: 6,8 => UNS
* INC # B5: 2 + B7: 6,8 # B8: 1 => UNS
* INC # B5: 2 + B7: 6,8 # A9: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # C9: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # E7: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # E7: 2,3,6 => UNS
* INC # B5: 2 + B7: 6,8 # C2: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 # C5: 1,4 => UNS
* INC # B5: 2 + B7: 6,8 => UNS
* INC # A4: 2 => UNS
* CNT  29 HDP CHAINS /  29 HYP OPENED

Full list of HDP chains traversed for F8,F9: 8..:

* INC # F8: 8 # B7: 1,6 => UNS
* INC # F8: 8 # A8: 1,6 => UNS
* INC # F8: 8 # A9: 1,6 => UNS
* INC # F8: 8 # E8: 1,6 => UNS
* INC # F8: 8 # E8: 3,5 => UNS
* INC # F8: 8 # B1: 1,6 => UNS
* INC # F8: 8 # B1: 2,5 => UNS
* INC # F8: 8 => UNS
* INC # F9: 8 # E8: 5,6 => UNS
* INC # F9: 8 # D9: 5,6 => UNS
* INC # F9: 8 # E9: 5,6 => UNS
* INC # F9: 8 # F1: 5,6 => UNS
* INC # F9: 8 # F1: 2,9 => UNS
* INC # F9: 8 => UNS
* CNT  14 HDP CHAINS /  14 HYP OPENED

Full list of HDP chains traversed for C4,B6: 5..:

* INC # C4: 5 # B5: 1,4 => UNS
* INC # C4: 5 # C5: 1,4 => UNS
* INC # C4: 5 # A6: 1,4 => UNS
* INC # C4: 5 # B2: 1,4 => UNS
* INC # C4: 5 # B7: 1,4 => UNS
* INC # C4: 5 => UNS
* INC # B6: 5 # E4: 4,9 => UNS
* INC # B6: 5 # E5: 4,9 => UNS
* INC # B6: 5 # F5: 4,9 => UNS
* INC # B6: 5 # E6: 4,9 => UNS
* INC # B6: 5 # A6: 4,9 => UNS
* INC # B6: 5 # A6: 1 => UNS
* INC # B6: 5 => UNS
* CNT  13 HDP CHAINS /  13 HYP OPENED

Full list of HDP chains traversed for D4,D7: 3..:

* INC # D4: 3 # H5: 6,9 => UNS
* INC # D4: 3 # H5: 1,7 => UNS
* INC # D4: 3 # E4: 6,9 => UNS
* INC # D4: 3 # E4: 2,4,5 => UNS
* INC # D4: 3 => UNS
* INC # D7: 3 # I8: 1,8 => UNS
* INC # D7: 3 # I9: 1,8 => UNS
* INC # D7: 3 # B7: 1,8 => UNS
* INC # D7: 3 # C7: 1,8 => UNS
* INC # D7: 3 # I5: 1,8 => UNS
* INC # D7: 3 # I5: 4,7,9 => UNS
* INC # D7: 3 => UNS
* CNT  12 HDP CHAINS /  12 HYP OPENED

Full list of HDP chains traversed for A9,C9: 9..:

* INC # A9: 9 # B5: 1,4 => UNS
* INC # A9: 9 # C5: 1,4 => UNS
* INC # A9: 9 # B6: 1,4 => UNS
* INC # A9: 9 # A2: 1,4 => UNS
* INC # A9: 9 # A2: 2,7 => UNS
* INC # A9: 9 => UNS
* INC # C9: 9 => UNS
* CNT   7 HDP CHAINS /   7 HYP OPENED

Full list of HDP chains traversed for C1,C2: 3..:

* INC # C1: 3 # G2: 2,7 => UNS
* INC # C1: 3 # H2: 2,7 => UNS
* INC # C1: 3 # H3: 2,7 => UNS
* INC # C1: 3 # A1: 2,7 => UNS
* INC # C1: 3 # E1: 2,7 => UNS
* INC # C1: 3 # G9: 2,7 => UNS
* INC # C1: 3 # G9: 6,8 => UNS
* INC # C1: 3 => UNS
* INC # C2: 3 => UNS
* CNT   9 HDP CHAINS /   9 HYP OPENED

Full list of HDP chains traversed for E1,D2: 1..:

* INC # E1: 1 # E4: 4,5 => UNS
* INC # E1: 1 # E6: 4,5 => UNS
* INC # E1: 1 # B6: 4,5 => UNS
* INC # E1: 1 # B6: 1 => UNS
* INC # E1: 1 # F9: 4,5 => UNS
* INC # E1: 1 # F9: 2,6,8 => UNS
* INC # E1: 1 => UNS
* INC # D2: 1 => UNS
* CNT   8 HDP CHAINS /   8 HYP OPENED