Analysis of xx-ph-02237065-2019_01_07-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.76.5..7.4.......5..8.97.3......2..9..5.6....5.....1.2..........6.82......2..59 initial

Autosolve

position: 98.76.5..7.4.......5..8.97.3......25.9..5.6....5....91.2.......5..6.82......2..59 autosolve
Autosolve

Pair Reduction Variants

Deep Constraint Pair Analysis

Deep Constraint Pair Analysis

Time used: 0:00:00.000013

List of important HDP chains detected for C8,E8: 9..:

* DIS # E8: 9 # B2: 1,3 => CTR => B2: 6
* DIS # E8: 9 + B2: 6 # H2: 1,3 => CTR => H2: 8
* DIS # E8: 9 + B2: 6 + H2: 8 # I5: 3,4 => CTR => I5: 7,8
* DIS # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 # I7: 3,4 => CTR => I7: 7,8
* PRF # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 # H1: 1 => SOL
* STA # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 + H1: 1
* CNT   5 HDP CHAINS /  20 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..7.4.......5..8.97.3......2..9..5.6....5.....1.2..........6.82......2..59 initial
98.76.5..7.4.......5..8.97.3......25.9..5.6....5....91.2.......5..6.82......2..59 autosolve

Classification

level: deep

Pairing Analysis

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* CONSTRAINT PAIRS (AUTO SOLVE)
D2,F2: 5.. / D2 = 5  =>  0 pairs (_) / F2 = 5  =>  0 pairs (_)
D7,F7: 5.. / D7 = 5  =>  0 pairs (_) / F7 = 5  =>  0 pairs (_)
D2,D7: 5.. / D2 = 5  =>  0 pairs (_) / D7 = 5  =>  0 pairs (_)
F2,F7: 5.. / F2 = 5  =>  0 pairs (_) / F7 = 5  =>  0 pairs (_)
F4,F6: 6.. / F4 = 6  =>  2 pairs (_) / F6 = 6  =>  1 pairs (_)
H7,I7: 6.. / H7 = 6  =>  0 pairs (_) / I7 = 6  =>  1 pairs (_)
H2,H7: 6.. / H2 = 6  =>  1 pairs (_) / H7 = 6  =>  0 pairs (_)
C7,C8: 9.. / C7 = 9  =>  4 pairs (_) / C8 = 9  =>  0 pairs (_)
C8,E8: 9.. / C8 = 9  =>  0 pairs (_) / E8 = 9  =>  4 pairs (_)
* DURATION: 0:00:09.631137  START: 20:16:57.094972  END: 20:17:06.726109 2020-11-19
* CP COUNT: (9)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
C8,E8: 9.. / C8 = 9  =>  0 pairs (X) / E8 = 9 ==>  0 pairs (*)
* DURATION: 0:00:29.616863  START: 20:17:06.726978  END: 20:17:36.343841 2020-11-19
* REASONING C8,E8: 9..
* DIS # E8: 9 # B2: 1,3 => CTR => B2: 6
* DIS # E8: 9 + B2: 6 # H2: 1,3 => CTR => H2: 8
* DIS # E8: 9 + B2: 6 + H2: 8 # I5: 3,4 => CTR => I5: 7,8
* DIS # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 # I7: 3,4 => CTR => I7: 7,8
* PRF # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 # H1: 1 => SOL
* STA # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 + H1: 1
* CNT   5 HDP CHAINS /  20 HYP OPENED
* DCP COUNT: (1)
* SOLUTION FOUND

Header Info

2237065;2019_01_07;PAQ;25;11.40;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for C8,E8: 9..:

* INC # E8: 9 # F1: 1,3 => UNS
* INC # E8: 9 # D3: 1,3 => UNS
* INC # E8: 9 # F3: 1,3 => UNS
* DIS # E8: 9 # B2: 1,3 => CTR => B2: 6
* INC # E8: 9 + B2: 6 # G2: 1,3 => UNS
* DIS # E8: 9 + B2: 6 # H2: 1,3 => CTR => H2: 8
* INC # E8: 9 + B2: 6 + H2: 8 # E7: 1,3 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # E7: 4,7 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # F1: 1,3 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # D3: 1,3 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # F3: 1,3 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # E7: 1,3 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # E7: 4,7 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # H1: 3,4 => UNS
* INC # E8: 9 + B2: 6 + H2: 8 # H1: 1 => UNS
* DIS # E8: 9 + B2: 6 + H2: 8 # I5: 3,4 => CTR => I5: 7,8
* DIS # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 # I7: 3,4 => CTR => I7: 7,8
* INC # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 # H1: 3,4 => UNS
* PRF # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 # H1: 1 => SOL
* STA # E8: 9 + B2: 6 + H2: 8 + I5: 7,8 + I7: 7,8 + H1: 1
* CNT  19 HDP CHAINS /  20 HYP OPENED