Analysis of xx-ph-00001584-H290-base.sdk

Contents

Original Sudoku

level: hard

Original Sudoku

position: 98.7..6..5...9..4......3...4.9.....2.5..8..9...1........5.4..1....6....3.....27.. initial

Autosolve

position: 98.7..6..5...9..4......3...4.9.....2.5..8..9.8.1........5.4..1....6....3.....27.. autosolve
Autosolve

Pair Reduction Variants

Pair Reduction Analysis

Pair Reduction Analysis

See Appendix: Full HDP Chains for full list of HDP chains.

Pair Reduction

Pair Reduction

See Appendix: Full HDP Chains for full list of HDP chains.

Deep Pair Reduction

Deep Pair Reduction

Time used: 0:00:25.291314

The following important HDP chains were detected:

* DIS # G3: 1,5 # G2: 8 => CTR => G2: 2,3
* DIS # G3: 1,5 + G2: 2,3 # G4: 1,5 => CTR => G4: 3,8
* DIS # I3: 1,5 # G2: 8 => CTR => G2: 2,3
* DIS # I3: 1,5 + G2: 2,3 # C1: 4 => CTR => C1: 2,3
* PRF # I3: 1,5 + G2: 2,3 + C1: 2,3 # D3: 1,5 => SOL
* STA # I3: 1,5 + G2: 2,3 + C1: 2,3 + D3: 1,5
* CNT   5 HDP CHAINS /  38 HYP OPENED

See Appendix: Full HDP Chains for full list of HDP chains.

Details

Positions

98.7..6..5...9..4......3...4.9.....2.5..8..9...1........5.4..1....6....3.....27.. initial
98.7..6..5...9..4......3...4.9.....2.5..8..9.8.1........5.4..1....6....3.....27.. autosolve
983714625512896347647523981479165832356287194821439576765348219298671453134952768 solved

Classification

level: hard

Pairing Analysis

--------------------------------------------------
* PAIRS (1)
I1: 1,5

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
H1,G2: 3.. / H1 = 3  =>  2 pairs (_) / G2 = 3  =>  4 pairs (_)
C1,H1: 3.. / C1 = 3  =>  4 pairs (_) / H1 = 3  =>  2 pairs (_)
F1,D3: 4.. / F1 = 4  =>  2 pairs (_) / D3 = 4  =>  5 pairs (_)
G8,I9: 4.. / G8 = 4  =>  3 pairs (_) / I9 = 4  =>  1 pairs (_)
C1,F1: 4.. / C1 = 4  =>  5 pairs (_) / F1 = 4  =>  2 pairs (_)
F2,E3: 6.. / F2 = 6  =>  2 pairs (_) / E3 = 6  =>  2 pairs (_)
G4,H4: 8.. / G4 = 8  =>  2 pairs (_) / H4 = 8  =>  3 pairs (_)
C8,C9: 8.. / C8 = 8  =>  2 pairs (_) / C9 = 8  =>  2 pairs (_)
G3,I3: 9.. / G3 = 9  =>  2 pairs (_) / I3 = 9  =>  2 pairs (_)
D6,F6: 9.. / D6 = 9  =>  2 pairs (_) / F6 = 9  =>  2 pairs (_)
* DURATION: 0:00:06.027290  START: 18:03:44.092669  END: 18:03:50.119959 2020-11-29
* CP COUNT: (10)
* INCONCLUSIVE

* DEEP PAIR REDUCTION
* DURATION: 0:00:25.086887  START: 18:03:53.582724  END: 18:04:18.669611 2020-11-29
* SOLUTION FOUND
* SAVE PR GRAPH xx-ph-00001584-H290-base-pr-002.dot
* REASONING
* DIS # G3: 1,5 # G2: 8 => CTR => G2: 2,3
* DIS # G3: 1,5 + G2: 2,3 # G4: 1,5 => CTR => G4: 3,8
* DIS # I3: 1,5 # G2: 8 => CTR => G2: 2,3
* DIS # I3: 1,5 + G2: 2,3 # C1: 4 => CTR => C1: 2,3
* PRF # I3: 1,5 + G2: 2,3 + C1: 2,3 # D3: 1,5 => SOL
* STA # I3: 1,5 + G2: 2,3 + C1: 2,3 + D3: 1,5
* CNT   5 HDP CHAINS /  38 HYP OPENED

Header Info

1584;H290;GP;22;11.30;1.20;1.20

Solution

position: 983714625512896347647523981479165832356287194821439576765348219298671453134952768 solved
Solution

See section Deep Pair Reduction for the HDP chains leading to this result.

Appendix: Full HDP Chains

A1. Pair Reduction Analysis

Full list of HDP chains traversed:

* INC # G3: 1,5 => UNS
* INC # I3: 1,5 => UNS
* INC # E1: 1,5 => UNS
* INC # F1: 1,5 => UNS
* CNT   4 HDP CHAINS /   4 HYP OPENED

A2. Pair Reduction

Full list of HDP chains traversed:

* INC # G3: 1,5 => UNS
* INC # I3: 1,5 => UNS
* INC # E1: 1,5 => UNS
* INC # F1: 1,5 => UNS
* CNT   4 HDP CHAINS /   4 HYP OPENED

A3. Deep Pair Reduction

Full list of HDP chains traversed:

* INC # G3: 1,5 => UNS
* INC # I3: 1,5 => UNS
* INC # E1: 1,5 => UNS
* INC # F1: 1,5 => UNS
* INC # G3: 1,5 # G2: 2,3 => UNS
* DIS # G3: 1,5 # G2: 8 => CTR => G2: 2,3
* INC # G3: 1,5 + G2: 2,3 # C1: 2,3 => UNS
* INC # G3: 1,5 + G2: 2,3 # C1: 4 => UNS
* INC # G3: 1,5 + G2: 2,3 # E1: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 # F1: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 # D3: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 # E3: 1,5 => UNS
* DIS # G3: 1,5 + G2: 2,3 # G4: 1,5 => CTR => G4: 3,8
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # D3: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # E3: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H9: 6,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # I9: 6,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # C1: 2,3 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # C1: 4 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # E1: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # F1: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # B2: 2,3 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # C2: 2,3 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # D3: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # E3: 1,5 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H4: 7,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H4: 3,5,6 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H4: 3,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H4: 5,6,7 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # H9: 6,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 # I9: 6,8 => UNS
* INC # G3: 1,5 + G2: 2,3 + G4: 3,8 => UNS
* INC # I3: 1,5 # G2: 2,3 => UNS
* DIS # I3: 1,5 # G2: 8 => CTR => G2: 2,3
* INC # I3: 1,5 + G2: 2,3 # C1: 2,3 => UNS
* DIS # I3: 1,5 + G2: 2,3 # C1: 4 => CTR => C1: 2,3
* PRF # I3: 1,5 + G2: 2,3 + C1: 2,3 # D3: 1,5 => SOL
* STA # I3: 1,5 + G2: 2,3 + C1: 2,3 + D3: 1,5
* CNT  37 HDP CHAINS /  38 HYP OPENED