Analysis of xx-ph-00016800-Kz1_b-base.sdk

Contents

Original Sudoku

level: deep

Original Sudoku

position: 98.7..6..5...4......3..9.2.4...8.9...7.5.......9..4..2..6..12.....4....3.......1. initial

Autosolve

position: 98.7..6..5...4......3..9.2.4...8.9...7.59......9..4..2..6..12.....4....3.......1. 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

Time used: 0:00:00.000007

List of important HDP chains detected for C1,C9: 4..:

* DIS # C9: 4 # C2: 1,2 => CTR => C2: 7
* DIS # C9: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* DIS # C9: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => C9: 2,5,7,8
* STA C9: 2,5,7,8
* CNT   7 HDP CHAINS /  46 HYP OPENED

List of important HDP chains detected for C1,B3: 4..:

* DIS # B3: 4 # C2: 1,2 => CTR => C2: 7
* DIS # B3: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* DIS # B3: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => B3: 1,6
* STA B3: 1,6
* CNT   7 HDP CHAINS /  46 HYP OPENED

List of important HDP chains detected for C2,A3: 7..:

* DIS # A3: 7 # C1: 1,2 => CTR => C1: 4
* DIS # A3: 7 + C1: 4 # C8: 1,2 => CTR => C8: 5,7,8
* DIS # A3: 7 + C1: 4 + C8: 5,7,8 # A5: 3,8 => CTR => A5: 1,2,6
* PRF # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 # A6: 3,8 => SOL
* STA # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 + A6: 3,8
* CNT   4 HDP CHAINS /  18 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

98.7..6..5...4......3..9.2.4...8.9...7.5.......9..4..2..6..12.....4....3.......1. initial
98.7..6..5...4......3..9.2.4...8.9...7.59......9..4..2..6..12.....4....3.......1. autosolve

Classification

level: deep

Pairing Analysis

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
C1,B3: 4.. / C1 = 4  =>  3 pairs (_) / B3 = 4  =>  1 pairs (_)
C1,C9: 4.. / C1 = 4  =>  3 pairs (_) / C9 = 4  =>  1 pairs (_)
H8,I9: 6.. / H8 = 6  =>  0 pairs (_) / I9 = 6  =>  0 pairs (_)
C2,A3: 7.. / C2 = 7  =>  1 pairs (_) / A3 = 7  =>  2 pairs (_)
F4,E6: 7.. / F4 = 7  =>  0 pairs (_) / E6 = 7  =>  2 pairs (_)
H2,I2: 9.. / H2 = 9  =>  0 pairs (_) / I2 = 9  =>  0 pairs (_)
D7,D9: 9.. / D7 = 9  =>  2 pairs (_) / D9 = 9  =>  1 pairs (_)
B8,H8: 9.. / B8 = 9  =>  0 pairs (_) / H8 = 9  =>  0 pairs (_)
* DURATION: 0:00:05.985753  START: 02:40:54.385618  END: 02:41:00.371371 2020-12-05
* CP COUNT: (8)
* INCONCLUSIVE

--------------------------------------------------
* DEEP CONSTRAINT PAIRS (PAIR REDUCTION)
C1,C9: 4.. / C1 = 4 ==>  3 pairs (_) / C9 = 4 ==>  0 pairs (X)
C1,B3: 4.. / C1 = 4 ==>  3 pairs (_) / B3 = 4 ==>  0 pairs (X)
D7,D9: 9.. / D7 = 9 ==>  2 pairs (_) / D9 = 9 ==>  1 pairs (_)
C2,A3: 7.. / C2 = 7  =>  0 pairs (X) / A3 = 7 ==>  0 pairs (*)
* DURATION: 0:01:13.685614  START: 02:41:00.371998  END: 02:42:14.057612 2020-12-05
* REASONING C1,C9: 4..
* DIS # C9: 4 # C2: 1,2 => CTR => C2: 7
* DIS # C9: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* DIS # C9: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => C9: 2,5,7,8
* STA C9: 2,5,7,8
* CNT   7 HDP CHAINS /  46 HYP OPENED
* REASONING C1,B3: 4..
* DIS # B3: 4 # C2: 1,2 => CTR => C2: 7
* DIS # B3: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* DIS # B3: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => B3: 1,6
* STA B3: 1,6
* CNT   7 HDP CHAINS /  46 HYP OPENED
* REASONING C2,A3: 7..
* DIS # A3: 7 # C1: 1,2 => CTR => C1: 4
* DIS # A3: 7 + C1: 4 # C8: 1,2 => CTR => C8: 5,7,8
* DIS # A3: 7 + C1: 4 + C8: 5,7,8 # A5: 3,8 => CTR => A5: 1,2,6
* PRF # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 # A6: 3,8 => SOL
* STA # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 + A6: 3,8
* CNT   4 HDP CHAINS /  18 HYP OPENED
* DCP COUNT: (4)
* SOLUTION FOUND

Header Info

16800;Kz1 b;GP;23;11.30;1.20;1.20

Appendix: Full HDP Chains

A1. Deep Constraint Pair Analysis

Full list of HDP chains traversed for C1,C9: 4..:

* INC # C1: 4 # B2: 1,6 => UNS
* INC # C1: 4 # A3: 1,6 => UNS
* INC # C1: 4 # D3: 1,6 => UNS
* INC # C1: 4 # E3: 1,6 => UNS
* INC # C1: 4 # B4: 1,6 => UNS
* INC # C1: 4 # B6: 1,6 => UNS
* INC # C1: 4 # E1: 3,5 => UNS
* INC # C1: 4 # F1: 3,5 => UNS
* INC # C1: 4 # H4: 3,5 => UNS
* INC # C1: 4 # H6: 3,5 => UNS
* INC # C1: 4 # G3: 1,5 => UNS
* INC # C1: 4 # I3: 1,5 => UNS
* INC # C1: 4 # E1: 1,5 => UNS
* INC # C1: 4 # E1: 2,3 => UNS
* INC # C1: 4 # I4: 1,5 => UNS
* INC # C1: 4 # I4: 6,7 => UNS
* INC # C1: 4 => UNS
* INC # C9: 4 # B2: 1,2 => UNS
* DIS # C9: 4 # C2: 1,2 => CTR => C2: 7
* INC # C9: 4 + C2: 7 # B2: 1,2 => UNS
* INC # C9: 4 + C2: 7 # B2: 6 => UNS
* INC # C9: 4 + C2: 7 # E1: 1,2 => UNS
* INC # C9: 4 + C2: 7 # E1: 3,5 => UNS
* INC # C9: 4 + C2: 7 # C4: 1,2 => UNS
* INC # C9: 4 + C2: 7 # C5: 1,2 => UNS
* DIS # C9: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 6 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # E1: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # E1: 3,5 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # C4: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # C5: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 6 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # E1: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # E1: 3,5 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # C4: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # C5: 1,2 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 1,6 => UNS
* INC # C9: 4 + C2: 7 + C8: 5,8 # B2: 2 => UNS
* DIS # C9: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* INC # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 1,2 => UNS
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # C9: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => C9: 2,5,7,8
* STA C9: 2,5,7,8
* CNT  46 HDP CHAINS /  46 HYP OPENED

Full list of HDP chains traversed for C1,B3: 4..:

* INC # C1: 4 # B2: 1,6 => UNS
* INC # C1: 4 # A3: 1,6 => UNS
* INC # C1: 4 # D3: 1,6 => UNS
* INC # C1: 4 # E3: 1,6 => UNS
* INC # C1: 4 # B4: 1,6 => UNS
* INC # C1: 4 # B6: 1,6 => UNS
* INC # C1: 4 # E1: 3,5 => UNS
* INC # C1: 4 # F1: 3,5 => UNS
* INC # C1: 4 # H4: 3,5 => UNS
* INC # C1: 4 # H6: 3,5 => UNS
* INC # C1: 4 # G3: 1,5 => UNS
* INC # C1: 4 # I3: 1,5 => UNS
* INC # C1: 4 # E1: 1,5 => UNS
* INC # C1: 4 # E1: 2,3 => UNS
* INC # C1: 4 # I4: 1,5 => UNS
* INC # C1: 4 # I4: 6,7 => UNS
* INC # C1: 4 => UNS
* INC # B3: 4 # B2: 1,2 => UNS
* DIS # B3: 4 # C2: 1,2 => CTR => C2: 7
* INC # B3: 4 + C2: 7 # B2: 1,2 => UNS
* INC # B3: 4 + C2: 7 # B2: 6 => UNS
* INC # B3: 4 + C2: 7 # E1: 1,2 => UNS
* INC # B3: 4 + C2: 7 # E1: 3,5 => UNS
* INC # B3: 4 + C2: 7 # C4: 1,2 => UNS
* INC # B3: 4 + C2: 7 # C5: 1,2 => UNS
* DIS # B3: 4 + C2: 7 # C8: 1,2 => CTR => C8: 5,8
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 6 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # E1: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # E1: 3,5 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # C4: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # C5: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 6 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # E1: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # E1: 3,5 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # C4: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # C5: 1,2 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 1,6 => UNS
* INC # B3: 4 + C2: 7 + C8: 5,8 # B2: 2 => UNS
* DIS # B3: 4 + C2: 7 + C8: 5,8 # D3: 1,6 => CTR => D3: 8
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 # E3: 1,6 => CTR => E3: 5
* INC # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 1,2 => UNS
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 # E1: 3 => CTR => E1: 1,2
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 # C4: 1,2 => CTR => C4: 5
* DIS # B3: 4 + C2: 7 + C8: 5,8 + D3: 8 + E3: 5 + E1: 1,2 + C4: 5 => CTR => B3: 1,6
* STA B3: 1,6
* CNT  46 HDP CHAINS /  46 HYP OPENED

Full list of HDP chains traversed for D7,D9: 9..:

* INC # D7: 9 => UNS
* INC # D9: 9 # F9: 3,8 => UNS
* INC # D9: 9 # F9: 2,5,6,7 => UNS
* INC # D9: 9 # A7: 3,8 => UNS
* INC # D9: 9 # A7: 7 => UNS
* INC # D9: 9 # D2: 3,8 => UNS
* INC # D9: 9 # D2: 1,2,6 => UNS
* INC # D9: 9 => UNS
* CNT   8 HDP CHAINS /   8 HYP OPENED

Full list of HDP chains traversed for C2,A3: 7..:

* DIS # A3: 7 # C1: 1,2 => CTR => C1: 4
* INC # A3: 7 + C1: 4 # B2: 1,2 => UNS
* INC # A3: 7 + C1: 4 # B2: 1,2 => UNS
* INC # A3: 7 + C1: 4 # B2: 6 => UNS
* INC # A3: 7 + C1: 4 # C4: 1,2 => UNS
* INC # A3: 7 + C1: 4 # C5: 1,2 => UNS
* DIS # A3: 7 + C1: 4 # C8: 1,2 => CTR => C8: 5,7,8
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # B2: 1,2 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # B2: 6 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # C4: 1,2 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # C5: 1,2 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # A9: 3,8 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # A9: 2 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # D7: 3,8 => UNS
* INC # A3: 7 + C1: 4 + C8: 5,7,8 # D7: 9 => UNS
* DIS # A3: 7 + C1: 4 + C8: 5,7,8 # A5: 3,8 => CTR => A5: 1,2,6
* PRF # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 # A6: 3,8 => SOL
* STA # A3: 7 + C1: 4 + C8: 5,7,8 + A5: 1,2,6 + A6: 3,8
* CNT  17 HDP CHAINS /  18 HYP OPENED