Analysis of xx-ph-00041149-12_07-base.sdk

Contents

Original Sudoku

level: hard

Original Sudoku

position: 98.7..6..7..5.......4.8..7.4...3..9..9.2.......3...5.1.4..7..8....4..1.......6..2 initial

Autosolve

position: 98.7..6..7..5.......4.8..7.4...3..9..9.2.......3...5.1.4..7..8....4..1.......6..2 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: 0:00:37.121367

The following important HDP chains were detected:

* DIS # I7: 3,9 # C4: 6,8 => CTR => C4: 1,2,5,7
* DIS # I7: 3,9 + C4: 1,2,5,7 # E5: 4,6 => CTR => E5: 1,5
* DIS # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # E2: 1,2 => CTR => E2: 4,6
* PRF # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 2 => SOL
* STA # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 + E8: 2
* CNT   4 HDP CHAINS /  35 HYP OPENED

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

Details

Positions

98.7..6..7..5.......4.8..7.4...3..9..9.2.......3...5.1.4..7..8....4..1.......6..2 initial
98.7..6..7..5.......4.8..7.4...3..9..9.2.......3...5.1.4..7..8....4..1.......6..2 autosolve
985713624762549813314682975457831296691254738823967541246175389539428167178396452 solved

Classification

level: hard

Pairing Analysis

--------------------------------------------------
* PAIRS (1)
G7: 3,9

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
H1,H2: 1.. / H1 = 1  =>  3 pairs (_) / H2 = 1  =>  2 pairs (_)
G4,H6: 2.. / G4 = 2  =>  7 pairs (_) / H6 = 2  =>  4 pairs (_)
G9,H9: 4.. / G9 = 4  =>  4 pairs (_) / H9 = 4  =>  3 pairs (_)
E2,D3: 6.. / E2 = 6  =>  3 pairs (_) / D3 = 6  =>  3 pairs (_)
I8,G9: 7.. / I8 = 7  =>  2 pairs (_) / G9 = 7  =>  4 pairs (_)
B6,F6: 7.. / B6 = 7  =>  1 pairs (_) / F6 = 7  =>  2 pairs (_)
G2,I2: 8.. / G2 = 8  =>  2 pairs (_) / I2 = 8  =>  2 pairs (_)
F8,D9: 8.. / F8 = 8  =>  1 pairs (_) / D9 = 8  =>  3 pairs (_)
* DURATION: 0:00:04.589371  START: 18:29:48.848129  END: 18:29:53.437500 2020-12-18
* CP COUNT: (8)
* INCONCLUSIVE

* DEEP PAIR REDUCTION
* DURATION: 0:00:36.933223  START: 18:29:59.010033  END: 18:30:35.943256 2020-12-18
* SOLUTION FOUND
* SAVE PR GRAPH xx-ph-00041149-12_07-base-pr-002.dot
* REASONING
* DIS # I7: 3,9 # C4: 6,8 => CTR => C4: 1,2,5,7
* DIS # I7: 3,9 + C4: 1,2,5,7 # E5: 4,6 => CTR => E5: 1,5
* DIS # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # E2: 1,2 => CTR => E2: 4,6
* PRF # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 2 => SOL
* STA # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 + E8: 2
* CNT   4 HDP CHAINS /  35 HYP OPENED

Header Info

41149;12_07;GP;24;11.30;11.30;10.40

Solution

position: 985713624762549813314682975457831296691254738823967541246175389539428167178396452 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 # I7: 3,9 => UNS
* INC # I8: 3,9 => UNS
* INC # G9: 3,9 => UNS
* INC # D7: 3,9 => UNS
* INC # F7: 3,9 => UNS
* INC # G2: 3,9 => UNS
* INC # G3: 3,9 => UNS
* CNT   7 HDP CHAINS /   7 HYP OPENED

A2. Pair Reduction

Full list of HDP chains traversed:

* INC # I7: 3,9 => UNS
* INC # I8: 3,9 => UNS
* INC # G9: 3,9 => UNS
* INC # D7: 3,9 => UNS
* INC # F7: 3,9 => UNS
* INC # G2: 3,9 => UNS
* INC # G3: 3,9 => UNS
* CNT   7 HDP CHAINS /   7 HYP OPENED

A3. Deep Pair Reduction

Full list of HDP chains traversed:

* INC # I7: 3,9 => UNS
* INC # I8: 3,9 => UNS
* INC # G9: 3,9 => UNS
* INC # D7: 3,9 => UNS
* INC # F7: 3,9 => UNS
* INC # G2: 3,9 => UNS
* INC # G3: 3,9 => UNS
* INC # I7: 3,9 # D6: 6,8 => UNS
* INC # I7: 3,9 # D6: 9 => UNS
* DIS # I7: 3,9 # C4: 6,8 => CTR => C4: 1,2,5,7
* INC # I7: 3,9 + C4: 1,2,5,7 # I4: 6,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # I4: 6,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # I4: 7 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # D6: 6,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # D6: 9 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # I4: 6,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 # I4: 7 => UNS
* DIS # I7: 3,9 + C4: 1,2,5,7 # E5: 4,6 => CTR => E5: 1,5
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # H6: 4,6 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # H6: 2 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # E2: 4,6 => UNS
* DIS # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 # E2: 1,2 => CTR => E2: 4,6
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # H6: 4,6 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # H6: 2 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 2,5 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 9 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # A7: 2,5 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # C7: 2,5 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # A8: 3,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # A8: 2,5 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # A9: 3,8 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # A9: 1,5 => UNS
* INC # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 5,9 => UNS
* PRF # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 # E8: 2 => SOL
* STA # I7: 3,9 + C4: 1,2,5,7 + E5: 1,5 + E2: 4,6 + E8: 2
* CNT  34 HDP CHAINS /  35 HYP OPENED