Analysis of xx-ph-00000437-172-base.sdk

Contents

Original Sudoku

level: very deep

Original Sudoku

position: .2......9...1...3.6....75......3...15....46.....9...2..7...8...8..64.....65...8.. initial

Autosolve

position: .2......9.5.1...3.6....75......3...15....46.....9...2..7...8...8..64.....65...8.. 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

Time used: 0:00:00.000007

List of important HDP chains detected for D1,D3: 4..:

* DIS # D3: 4 # H1: 1,8 => CTR => H1: 4,6,7
* DIS # D3: 4 + H1: 4,6,7 # I2: 2,8 => CTR => I2: 4,6,7
* CNT   2 HDP CHAINS /  16 HYP OPENED

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

Very Deep Constraint Pair Analysis

Very Deep Constraint Pair Analysis

Time used: 0:00:34.627972

List of important HDP chains detected for I2,I7: 6..:

* DIS # I2: 6 # F1: 5,6 # E6: 1,7 => CTR => E6: 5,6
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 # F6: 5,6 => CTR => F6: 1
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 # F4: 2 => CTR => F4: 5,6
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 # E2: 2,9 => CTR => E2: 8
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # E9: 2,7 => CTR => E9: 1,9
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 # A1: 3,4 => CTR => A1: 1,7
* PRF # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 # C1: 3,4 => SOL
* STA # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 + C1: 3,4
* CNT   7 HDP CHAINS /  30 HYP OPENED

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

Details

This sudoku is very deep. Here is some information that may be helpful on how to proceed.

Positions

.2......9...1...3.6....75......3...15....46.....9...2..7...8...8..64.....65...8.. initial
.2......9.5.1...3.6....75......3...15....46.....9...2..7...8...8..64.....65...8.. autosolve

Classification

level: very deep

Pairing Analysis

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
D1,D3: 4.. / D1 = 4  =>  1 pairs (_) / D3 = 4  =>  2 pairs (_)
H4,I6: 5.. / H4 = 5  =>  1 pairs (_) / I6 = 5  =>  1 pairs (_)
H1,I2: 6.. / H1 = 6  =>  2 pairs (_) / I2 = 6  =>  3 pairs (_)
C4,C6: 6.. / C4 = 6  =>  1 pairs (_) / C6 = 6  =>  3 pairs (_)
H7,I7: 6.. / H7 = 6  =>  3 pairs (_) / I7 = 6  =>  2 pairs (_)
C4,F4: 6.. / C4 = 6  =>  1 pairs (_) / F4 = 6  =>  3 pairs (_)
H1,H7: 6.. / H1 = 6  =>  2 pairs (_) / H7 = 6  =>  3 pairs (_)
I2,I7: 6.. / I2 = 6  =>  3 pairs (_) / I7 = 6  =>  2 pairs (_)
D9,E9: 7.. / D9 = 7  =>  1 pairs (_) / E9 = 7  =>  1 pairs (_)
* DURATION: 0:00:05.631886  START: 17:16:48.219791  END: 17:16:53.851677 2020-10-25
* CP COUNT: (9)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
I2,I7: 6.. / I2 = 6 ==>  3 pairs (_) / I7 = 6 ==>  2 pairs (_)
H1,H7: 6.. / H1 = 6 ==>  2 pairs (_) / H7 = 6 ==>  3 pairs (_)
H7,I7: 6.. / H7 = 6 ==>  3 pairs (_) / I7 = 6 ==>  2 pairs (_)
H1,I2: 6.. / H1 = 6 ==>  2 pairs (_) / I2 = 6 ==>  3 pairs (_)
C4,F4: 6.. / C4 = 6 ==>  1 pairs (_) / F4 = 6 ==>  3 pairs (_)
C4,C6: 6.. / C4 = 6 ==>  1 pairs (_) / C6 = 6 ==>  3 pairs (_)
D1,D3: 4.. / D1 = 4 ==>  1 pairs (_) / D3 = 4 ==>  3 pairs (_)
D9,E9: 7.. / D9 = 7 ==>  1 pairs (_) / E9 = 7 ==>  1 pairs (_)
H4,I6: 5.. / H4 = 5 ==>  1 pairs (_) / I6 = 5 ==>  1 pairs (_)
* DURATION: 0:01:12.945591  START: 17:16:53.852252  END: 17:18:06.797843 2020-10-25
* REASONING D1,D3: 4..
* DIS # D3: 4 # H1: 1,8 => CTR => H1: 4,6,7
* DIS # D3: 4 + H1: 4,6,7 # I2: 2,8 => CTR => I2: 4,6,7
* CNT   2 HDP CHAINS /  16 HYP OPENED
* DCP COUNT: (9)
* INCONCLUSIVE

--------------------------------------------------
* VERY DEEP CONSTRAINT PAIRS (PAIR REDUCTION, RECURSIVE)
I2,I7: 6.. / I2 = 6 ==>  0 pairs (*) / I7 = 6  =>  0 pairs (X)
* DURATION: 0:00:34.625212  START: 17:18:06.899626  END: 17:18:41.524838 2020-10-25
* REASONING I2,I7: 6..
* DIS # I2: 6 # F1: 5,6 # E6: 1,7 => CTR => E6: 5,6
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 # F6: 5,6 => CTR => F6: 1
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 # F4: 2 => CTR => F4: 5,6
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 # E2: 2,9 => CTR => E2: 8
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # E9: 2,7 => CTR => E9: 1,9
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 # A1: 3,4 => CTR => A1: 1,7
* PRF # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 # C1: 3,4 => SOL
* STA # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 + C1: 3,4
* CNT   7 HDP CHAINS /  30 HYP OPENED
* VDCP COUNT: (1)
* SOLUTION FOUND

Header Info

437;172;elev;22;11.40;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for I2,I7: 6..:

* INC # I2: 6 # F1: 5,6 => UNS
* INC # I2: 6 # F1: 3 => UNS
* INC # I2: 6 # E6: 5,6 => UNS
* INC # I2: 6 # E6: 1,7 => UNS
* INC # I2: 6 # E2: 2,9 => UNS
* INC # I2: 6 # E3: 2,9 => UNS
* INC # I2: 6 # F8: 2,9 => UNS
* INC # I2: 6 # F9: 2,9 => UNS
* INC # I2: 6 # D1: 3,4 => UNS
* INC # I2: 6 # D1: 5 => UNS
* INC # I2: 6 # B3: 3,4 => UNS
* INC # I2: 6 # C3: 3,4 => UNS
* INC # I2: 6 => UNS
* INC # I7: 6 # D1: 5,8 => UNS
* INC # I7: 6 # D1: 3,4 => UNS
* INC # I7: 6 # E6: 5,8 => UNS
* INC # I7: 6 # E6: 1,6,7 => UNS
* INC # I7: 6 # D1: 3,5 => UNS
* INC # I7: 6 # D1: 4,8 => UNS
* INC # I7: 6 # F8: 3,5 => UNS
* INC # I7: 6 # F8: 1,2,9 => UNS
* INC # I7: 6 => UNS
* CNT  22 HDP CHAINS /  22 HYP OPENED

Full list of HDP chains traversed for H1,H7: 6..:

* INC # H7: 6 # F1: 5,6 => UNS
* INC # H7: 6 # F1: 3 => UNS
* INC # H7: 6 # E6: 5,6 => UNS
* INC # H7: 6 # E6: 1,7 => UNS
* INC # H7: 6 # E2: 2,9 => UNS
* INC # H7: 6 # E3: 2,9 => UNS
* INC # H7: 6 # F8: 2,9 => UNS
* INC # H7: 6 # F9: 2,9 => UNS
* INC # H7: 6 # D1: 3,4 => UNS
* INC # H7: 6 # D1: 5 => UNS
* INC # H7: 6 # B3: 3,4 => UNS
* INC # H7: 6 # C3: 3,4 => UNS
* INC # H7: 6 => UNS
* INC # H1: 6 # D1: 5,8 => UNS
* INC # H1: 6 # D1: 3,4 => UNS
* INC # H1: 6 # E6: 5,8 => UNS
* INC # H1: 6 # E6: 1,6,7 => UNS
* INC # H1: 6 # D1: 3,5 => UNS
* INC # H1: 6 # D1: 4,8 => UNS
* INC # H1: 6 # F8: 3,5 => UNS
* INC # H1: 6 # F8: 1,2,9 => UNS
* INC # H1: 6 => UNS
* CNT  22 HDP CHAINS /  22 HYP OPENED

Full list of HDP chains traversed for H7,I7: 6..:

* INC # H7: 6 # F1: 5,6 => UNS
* INC # H7: 6 # F1: 3 => UNS
* INC # H7: 6 # E6: 5,6 => UNS
* INC # H7: 6 # E6: 1,7 => UNS
* INC # H7: 6 # E2: 2,9 => UNS
* INC # H7: 6 # E3: 2,9 => UNS
* INC # H7: 6 # F8: 2,9 => UNS
* INC # H7: 6 # F9: 2,9 => UNS
* INC # H7: 6 # D1: 3,4 => UNS
* INC # H7: 6 # D1: 5 => UNS
* INC # H7: 6 # B3: 3,4 => UNS
* INC # H7: 6 # C3: 3,4 => UNS
* INC # H7: 6 => UNS
* INC # I7: 6 # D1: 5,8 => UNS
* INC # I7: 6 # D1: 3,4 => UNS
* INC # I7: 6 # E6: 5,8 => UNS
* INC # I7: 6 # E6: 1,6,7 => UNS
* INC # I7: 6 # D1: 3,5 => UNS
* INC # I7: 6 # D1: 4,8 => UNS
* INC # I7: 6 # F8: 3,5 => UNS
* INC # I7: 6 # F8: 1,2,9 => UNS
* INC # I7: 6 => UNS
* CNT  22 HDP CHAINS /  22 HYP OPENED

Full list of HDP chains traversed for H1,I2: 6..:

* INC # I2: 6 # F1: 5,6 => UNS
* INC # I2: 6 # F1: 3 => UNS
* INC # I2: 6 # E6: 5,6 => UNS
* INC # I2: 6 # E6: 1,7 => UNS
* INC # I2: 6 # E2: 2,9 => UNS
* INC # I2: 6 # E3: 2,9 => UNS
* INC # I2: 6 # F8: 2,9 => UNS
* INC # I2: 6 # F9: 2,9 => UNS
* INC # I2: 6 # D1: 3,4 => UNS
* INC # I2: 6 # D1: 5 => UNS
* INC # I2: 6 # B3: 3,4 => UNS
* INC # I2: 6 # C3: 3,4 => UNS
* INC # I2: 6 => UNS
* INC # H1: 6 # D1: 5,8 => UNS
* INC # H1: 6 # D1: 3,4 => UNS
* INC # H1: 6 # E6: 5,8 => UNS
* INC # H1: 6 # E6: 1,6,7 => UNS
* INC # H1: 6 # D1: 3,5 => UNS
* INC # H1: 6 # D1: 4,8 => UNS
* INC # H1: 6 # F8: 3,5 => UNS
* INC # H1: 6 # F8: 1,2,9 => UNS
* INC # H1: 6 => UNS
* CNT  22 HDP CHAINS /  22 HYP OPENED

Full list of HDP chains traversed for C4,F4: 6..:

* INC # F4: 6 # D1: 3,5 => UNS
* INC # F4: 6 # D1: 4,8 => UNS
* INC # F4: 6 # F8: 3,5 => UNS
* INC # F4: 6 # F8: 1,2,9 => UNS
* INC # F4: 6 # E2: 2,9 => UNS
* INC # F4: 6 # E3: 2,9 => UNS
* INC # F4: 6 # F8: 2,9 => UNS
* INC # F4: 6 # F9: 2,9 => UNS
* INC # F4: 6 # E6: 1,5 => UNS
* INC # F4: 6 # E6: 7,8 => UNS
* INC # F4: 6 # F8: 1,5 => UNS
* INC # F4: 6 # F8: 2,3,9 => UNS
* INC # F4: 6 => UNS
* INC # C4: 6 # D4: 2,5 => UNS
* INC # C4: 6 # D4: 7,8 => UNS
* INC # C4: 6 # F8: 2,5 => UNS
* INC # C4: 6 # F8: 1,3,9 => UNS
* INC # C4: 6 => UNS
* CNT  18 HDP CHAINS /  18 HYP OPENED

Full list of HDP chains traversed for C4,C6: 6..:

* INC # C6: 6 # D1: 3,5 => UNS
* INC # C6: 6 # D1: 4,8 => UNS
* INC # C6: 6 # F8: 3,5 => UNS
* INC # C6: 6 # F8: 1,2,9 => UNS
* INC # C6: 6 # E2: 2,9 => UNS
* INC # C6: 6 # E3: 2,9 => UNS
* INC # C6: 6 # F8: 2,9 => UNS
* INC # C6: 6 # F9: 2,9 => UNS
* INC # C6: 6 # E6: 1,5 => UNS
* INC # C6: 6 # E6: 7,8 => UNS
* INC # C6: 6 # F8: 1,5 => UNS
* INC # C6: 6 # F8: 2,3,9 => UNS
* INC # C6: 6 => UNS
* INC # C4: 6 # D4: 2,5 => UNS
* INC # C4: 6 # D4: 7,8 => UNS
* INC # C4: 6 # F8: 2,5 => UNS
* INC # C4: 6 # F8: 1,3,9 => UNS
* INC # C4: 6 => UNS
* CNT  18 HDP CHAINS /  18 HYP OPENED

Full list of HDP chains traversed for D1,D3: 4..:

* DIS # D3: 4 # H1: 1,8 => CTR => H1: 4,6,7
* INC # D3: 4 + H1: 4,6,7 # B3: 1,8 => UNS
* INC # D3: 4 + H1: 4,6,7 # C3: 1,8 => UNS
* DIS # D3: 4 + H1: 4,6,7 # I2: 2,8 => CTR => I2: 4,6,7
* INC # D3: 4 + H1: 4,6,7 + I2: 4,6,7 # E2: 2,9 => UNS
* INC # D3: 4 + H1: 4,6,7 + I2: 4,6,7 # F2: 2,9 => UNS
* INC # D3: 4 + H1: 4,6,7 + I2: 4,6,7 # E7: 2,9 => UNS
* INC # D3: 4 + H1: 4,6,7 + I2: 4,6,7 # E9: 2,9 => UNS
* INC # D3: 4 + H1: 4,6,7 + I2: 4,6,7 => UNS
* INC # D1: 4 # H1: 1,7 => UNS
* INC # D1: 4 # H1: 6,8 => UNS
* INC # D1: 4 # A1: 1,7 => UNS
* INC # D1: 4 # C1: 1,7 => UNS
* INC # D1: 4 # G8: 1,7 => UNS
* INC # D1: 4 # G8: 2,3,9 => UNS
* INC # D1: 4 => UNS
* CNT  16 HDP CHAINS /  16 HYP OPENED

Full list of HDP chains traversed for D9,E9: 7..:

* INC # D9: 7 # D4: 2,8 => UNS
* INC # D9: 7 # E5: 2,8 => UNS
* INC # D9: 7 # C5: 2,8 => UNS
* INC # D9: 7 # C5: 1,3,7,9 => UNS
* INC # D9: 7 # D3: 2,8 => UNS
* INC # D9: 7 # D3: 3,4 => UNS
* INC # D9: 7 => UNS
* INC # E9: 7 # D7: 2,3 => UNS
* INC # E9: 7 # F8: 2,3 => UNS
* INC # E9: 7 # F9: 2,3 => UNS
* INC # E9: 7 # A9: 2,3 => UNS
* INC # E9: 7 # I9: 2,3 => UNS
* INC # E9: 7 # D3: 2,3 => UNS
* INC # E9: 7 # D3: 4,8 => UNS
* INC # E9: 7 => UNS
* CNT  15 HDP CHAINS /  15 HYP OPENED

Full list of HDP chains traversed for H4,I6: 5..:

* INC # H4: 5 # C4: 2,6 => UNS
* INC # H4: 5 # C4: 4,7,8,9 => UNS
* INC # H4: 5 # F2: 2,6 => UNS
* INC # H4: 5 # F2: 9 => UNS
* INC # H4: 5 => UNS
* INC # I6: 5 # E6: 1,6 => UNS
* INC # I6: 5 # E6: 7,8 => UNS
* INC # I6: 5 # C6: 1,6 => UNS
* INC # I6: 5 # C6: 3,4,7,8 => UNS
* INC # I6: 5 => UNS
* CNT  10 HDP CHAINS /  10 HYP OPENED

A2. Very Deep Constraint Pair Analysis

Full list of HDP chains traversed for I2,I7: 6..:

* INC # I2: 6 # F1: 5,6 => UNS
* INC # I2: 6 # F1: 3 => UNS
* INC # I2: 6 # E6: 5,6 => UNS
* INC # I2: 6 # E6: 1,7 => UNS
* INC # I2: 6 # E2: 2,9 => UNS
* INC # I2: 6 # E3: 2,9 => UNS
* INC # I2: 6 # F8: 2,9 => UNS
* INC # I2: 6 # F9: 2,9 => UNS
* INC # I2: 6 # D1: 3,4 => UNS
* INC # I2: 6 # D1: 5 => UNS
* INC # I2: 6 # B3: 3,4 => UNS
* INC # I2: 6 # C3: 3,4 => UNS
* INC # I2: 6 # F1: 5,6 # A1: 3,4 => UNS
* INC # I2: 6 # F1: 5,6 # C1: 3,4 => UNS
* INC # I2: 6 # F1: 5,6 # E6: 5,6 => UNS
* DIS # I2: 6 # F1: 5,6 # E6: 1,7 => CTR => E6: 5,6
* INC # I2: 6 # F1: 5,6 + E6: 5,6 # F4: 5,6 => UNS
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 # F6: 5,6 => CTR => F6: 1
* INC # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 # F4: 5,6 => UNS
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 # F4: 2 => CTR => F4: 5,6
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 # E2: 2,9 => CTR => E2: 8
* INC # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # F8: 2,9 => UNS
* INC # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # F9: 2,9 => UNS
* INC # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # B3: 3,4 => UNS
* INC # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # C3: 3,4 => UNS
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 # E9: 2,7 => CTR => E9: 1,9
* DIS # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 # A1: 3,4 => CTR => A1: 1,7
* PRF # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 # C1: 3,4 => SOL
* STA # I2: 6 # F1: 5,6 + E6: 5,6 + F6: 1 + F4: 5,6 + E2: 8 + E9: 1,9 + A1: 1,7 + C1: 3,4
* CNT  28 HDP CHAINS /  30 HYP OPENED