Analysis of xx-ph-02489372-2019_08_05_a-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.76.5..7..5...9...5.....684.........987..6......3...2......83..839..5.......1.. initial

Autosolve

position: 98.76.5..7..5...9...5.....684.........987..6......3...2......83..839..5.......1.. 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 C1,H1: 3..:

* DIS # C1: 3 # H3: 1,4 => CTR => H3: 2,3,7
* DIS # C1: 3 + H3: 2,3,7 # I6: 2,4 => CTR => I6: 1,5,7,8,9
* PRF # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # G3: 2,4 => SOL
* STA # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 + G3: 2,4
* CNT   3 HDP CHAINS /  31 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

98.76.5..7..5...9...5.....684.........987..6......3...2......83..839..5.......1.. initial
98.76.5..7..5...9...5.....684.........987..6......3...2......83..839..5.......1.. autosolve

Classification

level: deep

Pairing Analysis

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
E2,E3: 3.. / E2 = 3  =>  0 pairs (_) / E3 = 3  =>  2 pairs (_)
C1,H1: 3.. / C1 = 3  =>  5 pairs (_) / H1 = 3  =>  0 pairs (_)
B2,C2: 6.. / B2 = 6  =>  1 pairs (_) / C2 = 6  =>  0 pairs (_)
G7,G8: 6.. / G7 = 6  =>  1 pairs (_) / G8 = 6  =>  2 pairs (_)
G3,H3: 7.. / G3 = 7  =>  0 pairs (_) / H3 = 7  =>  1 pairs (_)
G6,I6: 8.. / G6 = 8  =>  0 pairs (_) / I6 = 8  =>  0 pairs (_)
E9,F9: 8.. / E9 = 8  =>  0 pairs (_) / F9 = 8  =>  2 pairs (_)
I2,I6: 8.. / I2 = 8  =>  0 pairs (_) / I6 = 8  =>  0 pairs (_)
D3,F3: 9.. / D3 = 9  =>  4 pairs (_) / F3 = 9  =>  0 pairs (_)
B7,B9: 9.. / B7 = 9  =>  0 pairs (_) / B9 = 9  =>  2 pairs (_)
G7,I9: 9.. / G7 = 9  =>  2 pairs (_) / I9 = 9  =>  0 pairs (_)
B7,G7: 9.. / B7 = 9  =>  0 pairs (_) / G7 = 9  =>  2 pairs (_)
B9,I9: 9.. / B9 = 9  =>  2 pairs (_) / I9 = 9  =>  0 pairs (_)
F3,F4: 9.. / F3 = 9  =>  0 pairs (_) / F4 = 9  =>  4 pairs (_)
* DURATION: 0:00:08.839602  START: 13:02:17.016982  END: 13:02:25.856584 2020-10-25
* CP COUNT: (14)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
C1,H1: 3.. / C1 = 3 ==>  0 pairs (*) / H1 = 3  =>  0 pairs (X)
* DURATION: 0:00:25.610833  START: 13:02:25.857228  END: 13:02:51.468061 2020-10-25
* REASONING C1,H1: 3..
* DIS # C1: 3 # H3: 1,4 => CTR => H3: 2,3,7
* DIS # C1: 3 + H3: 2,3,7 # I6: 2,4 => CTR => I6: 1,5,7,8,9
* PRF # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # G3: 2,4 => SOL
* STA # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 + G3: 2,4
* CNT   3 HDP CHAINS /  31 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

2489372;2019_08_05_a;PAQ;25;11.40;11.40;10.00

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for C1,H1: 3..:

* INC # C1: 3 # C2: 1,4 => UNS
* INC # C1: 3 # C2: 2,6 => UNS
* INC # C1: 3 # D3: 1,4 => UNS
* INC # C1: 3 # E3: 1,4 => UNS
* INC # C1: 3 # F3: 1,4 => UNS
* DIS # C1: 3 # H3: 1,4 => CTR => H3: 2,3,7
* INC # C1: 3 + H3: 2,3,7 # A8: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # A8: 6 => UNS
* INC # C1: 3 + H3: 2,3,7 # C2: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # C2: 2,6 => UNS
* INC # C1: 3 + H3: 2,3,7 # D3: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # E3: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # F3: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # A8: 1,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # A8: 6 => UNS
* INC # C1: 3 + H3: 2,3,7 # B2: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # C2: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # D3: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # E3: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # F3: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # B5: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # B6: 1,2 => UNS
* INC # C1: 3 + H3: 2,3,7 # I5: 2,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # G6: 2,4 => UNS
* INC # C1: 3 + H3: 2,3,7 # H6: 2,4 => UNS
* DIS # C1: 3 + H3: 2,3,7 # I6: 2,4 => CTR => I6: 1,5,7,8,9
* INC # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # F5: 2,4 => UNS
* INC # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # F5: 1,5 => UNS
* INC # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # G2: 2,4 => UNS
* PRF # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 # G3: 2,4 => SOL
* STA # C1: 3 + H3: 2,3,7 + I6: 1,5,7,8,9 + G3: 2,4
* CNT  30 HDP CHAINS /  31 HYP OPENED