Analysis of zz-www.sudokuoftheday.co.uk-20060411-absurd-base.sdk

Contents

Sudoku from http://www.sudokuoftheday.co.uk/cgi-bin/sudoku1280.cgi?ACTION=archive2&USER=&MONTH=Apr&YEAR=2006

level: medium

Sudoku from http://www.sudokuoftheday.co.uk/cgi-bin/sudoku1280.cgi?ACTION=archive2&USER=&MONTH=Apr&YEAR=2006

position: 71..3.6.......7.....345...9...21.79.6.2.....3...5....4.3.......4.6.....2.5.8.9... initial

Autosolve

position: 71.93.6.......7...8.345..79...21.79.6.27....3.7.5....4.3.......4.637...2.5.8.9... autosolve
Autosolve

Pair Reduction Variants

Pair Reduction Analysis

Pair Reduction Analysis

The following important HDP chains were detected:

* PRF # C2: 4,5 => SOL
* DIS # C2: 4 => CTR => C2: 5,9
* PRF # E2: 2,6 => SOL
* DIS # F3: 1 => CTR => F3: 2,6
* PRF # E2: 6 => SOL
* PRF # F3: 2 => SOL
* DIS # H1: 5,8 => CTR => H1: 2,4
* DIS # G2: 5,8 => CTR => G2: 1,2,3,4
* DIS # H2: 5,8 => CTR => H2: 1,2,3,4
* DIS # I7: 5,8 => CTR => I7: 1,6,7
* DIS # G2: 1,2 => CTR => G2: 3,4,5,8
* DIS # H2: 1,2 => CTR => H2: 3,4,5,8
* DIS # F3: 6 => CTR => F3: 1,2
* DIS # F4: 4,8 => CTR => F4: 3,6
* DIS # F4: 4,8 => CTR => F4: 3,6
* PRF # H6: 6,8 => SOL
* DIS # I7: 6,8 => CTR => I7: 1,5,7
* DIS # G2: 1,5 => CTR => G2: 2,3,4,8
* DIS # G7: 1,5 => CTR => G7: 4,8,9
* DIS # G8: 1,5 => CTR => G8: 8,9
* DIS # H2: 1,5 => CTR => H2: 2,3,4,8
* DIS # H7: 1,5 => CTR => H7: 4,6,8
* DIS # H6: 6 => CTR => H6: 2,8
* DIS # G2: 2,8 => CTR => G2: 1,3,4,5
* DIS # C7: 1,7 => CTR => C7: 8,9
* DIS # G8: 1,5 => CTR => G8: 8,9
* DIS # B5: 4 => CTR => B5: 8,9
* DIS # A7: 9 => CTR => A7: 1,2
* DIS # C7: 1,7 => CTR => C7: 8,9
* DIS # I9: 6 => CTR => I9: 1,7
* DIS # F7: 1,6 => CTR => F7: 2,4,5
* DIS # H7: 1,6 => CTR => H7: 4,5,8
* DIS # I7: 1,6 => CTR => I7: 5,7,8
* DIS # F7: 2,4,6 => CTR => F7: 1,5
* DIS # G8: 1,5 => CTR => G8: 8,9
* CNT  35 HDP CHAINS /  84 HYP OPENED

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

Pair Reduction

Pair Reduction

The following important HDP chains were detected:

* PRF # C2: 4,5 => SOL
* STA C2: 4,5
* CNT   1 HDP CHAINS /   1 HYP OPENED

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

Details

Positions

71..3.6.......7.....345...9...21.79.6.2.....3...5....4.3.......4.6.....2.5.8.9... initial
71.93.6.......7...8.345..79...21.79.6.27....3.7.5....4.3.......4.637...2.5.8.9... autosolve
714938625925167438863452179548213796692784513371596284139625847486371952257849361 solved

Classification

level: medium

Pairing Analysis

--------------------------------------------------
* PAIRS (21)
C1: 4,5
A2: 5,9
B2: 2,6
B3: 2,6
F1: 2,8
D2: 1,6
I1: 5,8
G3: 1,2
A4: 3,5
B4: 4,8
C4: 5,8
F5: 4,8
I4: 6,8
G5: 1,5
H5: 1,5
G6: 2,8
B8: 8,9
A9: 1,2
C9: 1,7
D7: 1,6
F8: 1,5

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
D2,F3: 1.. / D2 = 1  => 28 pairs (_) / F3 = 1  =>  0 pairs (X)
A6,C6: 1.. / A6 = 1  =>  0 pairs (X) / C6 = 1  => 24 pairs (_)
G5,H5: 1.. / G5 = 1  =>  0 pairs (X) / H5 = 1  => 20 pairs (_)
F3,G3: 1.. / F3 = 1  =>  0 pairs (X) / G3 = 1  => 28 pairs (_)
D2,D7: 1.. / D2 = 1  => 28 pairs (_) / D7 = 1  =>  0 pairs (X)
B2,B3: 2.. / B2 = 2  => 21 pairs (_) / B3 = 2  =>  0 pairs (X)
G6,H6: 2.. / G6 = 2  =>  0 pairs (*) / H6 = 2  =>  0 pairs (X)
A7,A9: 2.. / A7 = 2  =>  0 pairs (X) / A9 = 2  => 22 pairs (_)
F1,H1: 2.. / F1 = 2  => 24 pairs (_) / H1 = 2  =>  0 pairs (*)
A9,E9: 2.. / A9 = 2  => 22 pairs (_) / E9 = 2  =>  0 pairs (X)
G2,H2: 3.. / G2 = 3  => 22 pairs (_) / H2 = 3  => 21 pairs (_)
A4,A6: 3.. / A4 = 3  => 22 pairs (_) / A6 = 3  =>  0 pairs (*)
F4,F6: 3.. / F4 = 3  =>  0 pairs (*) / F6 = 3  =>  0 pairs (X)
G9,H9: 3.. / G9 = 3  => 21 pairs (_) / H9 = 3  => 22 pairs (_)
A4,F4: 3.. / A4 = 3  => 22 pairs (_) / F4 = 3  =>  0 pairs (*)
A6,F6: 3.. / A6 = 3  =>  0 pairs (*) / F6 = 3  =>  0 pairs (X)
G2,G9: 3.. / G2 = 3  => 22 pairs (_) / G9 = 3  => 21 pairs (_)
H2,H9: 3.. / H2 = 3  => 21 pairs (_) / H9 = 3  => 22 pairs (_)
C1,C2: 4.. / C1 = 4  => 24 pairs (_) / C2 = 4  =>  0 pairs (X)
B4,B5: 4.. / B4 = 4  => 21 pairs (_) / B5 = 4  =>  0 pairs (X)
C1,H1: 4.. / C1 = 4  => 24 pairs (_) / H1 = 4  =>  0 pairs (X)
B4,F4: 4.. / B4 = 4  => 21 pairs (_) / F4 = 4  =>  0 pairs (X)
A4,C4: 5.. / A4 = 5  =>  0 pairs (*) / C4 = 5  =>  0 pairs (X)
G5,H5: 5.. / G5 = 5  => 20 pairs (_) / H5 = 5  =>  0 pairs (X)
F7,F8: 5.. / F7 = 5  => 28 pairs (_) / F8 = 5  =>  0 pairs (X)
A2,A4: 5.. / A2 = 5  => 22 pairs (_) / A4 = 5  =>  0 pairs (*)
B2,B3: 6.. / B2 = 6  =>  0 pairs (X) / B3 = 6  => 21 pairs (_)
I4,H6: 6.. / I4 = 6  => 27 pairs (_) / H6 = 6  =>  0 pairs (X)
B3,F3: 6.. / B3 = 6  => 21 pairs (_) / F3 = 6  =>  0 pairs (X)
F4,I4: 6.. / F4 = 6  =>  0 pairs (X) / I4 = 6  => 27 pairs (_)
D2,D7: 6.. / D2 = 6  =>  0 pairs (X) / D7 = 6  => 28 pairs (_)
C7,C9: 7.. / C7 = 7  =>  0 pairs (X) / C9 = 7  => 21 pairs (_)
I7,I9: 7.. / I7 = 7  => 21 pairs (_) / I9 = 7  =>  0 pairs (X)
C7,I7: 7.. / C7 = 7  =>  0 pairs (X) / I7 = 7  => 21 pairs (_)
C9,I9: 7.. / C9 = 7  => 21 pairs (_) / I9 = 7  =>  0 pairs (X)
F1,E2: 8.. / F1 = 8  =>  0 pairs (*) / E2 = 8  =>  0 pairs (X)
C7,B8: 8.. / C7 = 8  => 23 pairs (_) / B8 = 8  => 25 pairs (_)
A2,C2: 9.. / A2 = 9  =>  0 pairs (*) / C2 = 9  =>  0 pairs (X)
E5,E6: 9.. / E5 = 9  => 23 pairs (_) / E6 = 9  => 25 pairs (_)
G7,G8: 9.. / G7 = 9  => 23 pairs (_) / G8 = 9  => 25 pairs (_)
B5,E5: 9.. / B5 = 9  => 25 pairs (_) / E5 = 9  => 23 pairs (_)
B8,G8: 9.. / B8 = 9  => 23 pairs (_) / G8 = 9  => 25 pairs (_)
B5,B8: 9.. / B5 = 9  => 25 pairs (_) / B8 = 9  => 23 pairs (_)
* DURATION: 0:00:46.713259  START: 22:18:06.389479  END: 22:18:53.102738 2019-04-30
* CP COUNT: (43)
* SOLUTION FOUND

--------------------------------------------------
* PREPARE PR GRAPH
* PAIR REDUCTION ..
* LEVEL 0 PASS 1 ROUND 1 (AUTO SOLVE) (A2,A4,A9,B2,B3,B4,B8,C1,C4,C9,D2,D7,F1,F5,F8,G3,G5,G6,H5,I1,I4)
* 71.93.6.......7...8.345..79...21.79.6.27....3.7.5....4.3.......4.637...2.5.8.9...
* PAIR C1: 4,5 BLK 1
C2: 4,5,9                                # reduction candidate for 4,5
C2: 4,5 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
C2: 9                                    # 22 pairs
* PAIR C1: 4,5 ROW 1
H1: 4,5,2,8                              # reduction candidate for 4,5
H1: 4,5                                  # 29 pairs
H1: 2,8                                  # 24 pairs
* PAIR A2: 5,9 BLK 1
C2: 5,9,4                                # reduction candidate for 5,9
C2: 4 => CTR
* 71593.6489.4.87..586345..79548213796692748..3371596..41396....748637.9.2.578.9..1
C2: 5,9                                  # 24 pairs
* PAIR B2: 2,6 ROW 2
E2: 2,6,8                                # reduction candidate for 2,6
E2: 2,6 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
E2: 8                                    # 24 pairs
* PAIR B3: 2,6 ROW 3
F3: 2,6,1                                # reduction candidate for 2,6
F3: 1 => CTR
* 71.9326...2.687..1863451279.482137966927....3.7.5..824.371.....486375912.518.9..7
F3: 2,6                                  # 28 pairs
* PAIR F1: 2,8 BLK 2
E2: 2,8,6                                # reduction candidate for 2,8
E2: 6 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
E2: 2,8                                  # 23 pairs
* PAIR F1: 2,8 ROW 1
H1: 2,8,4,5                              # reduction candidate for 2,8
H1: 4,5                                  # 29 pairs
H1: 2,8                                  # 24 pairs
* PAIR D2: 1,6 BLK 2
F3: 1,6,2                                # reduction candidate for 1,6
F3: 2 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
F3: 1,6                                  # 23 pairs
* PAIR I1: 5,8 BLK 3
H1: 5,8,2,4                              # reduction candidate for 5,8
H1: 5,8 => CTR
* 7149326...2.687..1863451279.482137966927....3.7.5..824.371.....486375912.518.9..7
H1: 2,4                                  # 22 pairs
G2: 5,8,1,2,3,4                          # reduction candidate for 5,8
G2: 5,8 => CTR
* 715932648924.875318634512795.82137966927....3.7.5..824.3....4..4.637.9.2.5.8493..
G2: 1,2,3,4                              # 21 pairs
H2: 5,8,1,2,3,4                          # reduction candidate for 5,8
H2: 5,8 => CTR
* 7159326489246873518634512795.82137966.27.8513371596824.39....6.4.637...2.5.86943.
H2: 1,2,3,4                              # 21 pairs
I2: 5,8,1                                # reduction candidate for 5,8
I2: 5,8                                  # 28 pairs
* PAIR I1: 5,8 COL I
I7: 5,8,1,6,7                            # reduction candidate for 5,8
I7: 5,8 => CTR
* 71.93.6.......7..18.3451279.4.21.7966927....31785....4.37......48637.9.2.518.9..7
I7: 1,6,7                                # 21 pairs
* PAIR G3: 1,2 BLK 3
G2: 1,2,3,4,5,8                          # reduction candidate for 1,2
G2: 1,2 => CTR
* 7159326489.4.87.358.345..795.82137966927....3.7.5...24.3....4..4.637.9.2.5.8493..
G2: 3,4,5,8                              # 21 pairs
H2: 1,2,3,4,5,8                          # reduction candidate for 1,2
H2: 1,2 => CTR
* 7159326489.4.873.58.345..795.82137966.27.8..3371596..4.39..4.674.637...2.5.8.9.3.
H2: 3,4,5,8                              # 21 pairs
* PAIR G3: 1,2 ROW 3
F3: 1,2,6                                # reduction candidate for 1,2
F3: 6 => CTR
* 71.9326...6.18723.823456179...21.7966.279.513.7.56...4.3.6.5...496371852.5.8.936.
F3: 1,2                                  # 21 pairs
* PAIR B4: 4,8 BLK 4
B5: 4,8,9                                # reduction candidate for 4,8
B5: 9                                    # 25 pairs
B5: 4,8                                  # 23 pairs
* PAIR B4: 4,8 ROW 4
F4: 4,8,3,6                              # reduction candidate for 4,8
F4: 4,8 => CTR
* 71493.6.55.9.87.3.8.345..793.521.7966.279...3971563..4.38...94749637...2.57849361
F4: 3,6                                  # 22 pairs
* PAIR F5: 4,8 BLK 5
F4: 4,8,3,6                              # reduction candidate for 4,8
F4: 4,8 => CTR
* 71493.6.55.9.87.3.8.345..793.521.7966.279...3971563..4.38...94749637...2.57849361
F4: 3,6                                  # 22 pairs
E5: 4,8,9                                # reduction candidate for 4,8
E5: 4,8                                  # 25 pairs
* PAIR F5: 4,8 ROW 5
B5: 4,8,9                                # reduction candidate for 4,8
B5: 9                                    # 25 pairs
B5: 4,8                                  # 23 pairs
* PAIR I4: 6,8 BLK 6
H6: 6,8,2                                # reduction candidate for 6,8
H6: 6,8 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
H6: 2                                    # 27 pairs
* PAIR I4: 6,8 ROW 4
F4: 6,8,3,4                              # reduction candidate for 6,8
F4: 3,4                                  # 29 pairs
F4: 6,8                                  # 23 pairs
* PAIR I4: 6,8 COL I
I7: 6,8,1,5,7                            # reduction candidate for 6,8
I7: 6,8 => CTR
* 71.93.6.......7..18.3451279.4.21.79.6927....31785....4.37......48637.9.2.518.9..7
I7: 1,5,7                                # 21 pairs
* PAIR G5: 1,5 COL G
G2: 1,5,2,3,4,8                          # reduction candidate for 1,5
G2: 1,5 => CTR
* 715932648924.87.3.8634512795.82137966927....3.7.5..824.3....4..4.637.9.2.5.8493..
G2: 2,3,4,8                              # 21 pairs
G7: 1,5,4,8,9                            # reduction candidate for 1,5
G7: 1,5 => CTR
* 71.9326.5.2.687..1863451279.4821.796692748153.71596824.3.1.45.84863759121578.9...
G7: 4,8,9                                # 21 pairs
G8: 1,5,8,9                              # reduction candidate for 1,5
G8: 1,5 => CTR
* 7149386255.9..7...8.345.1793.521.79.6827945.39715.3..4.38...9.749637..82.578.9...
G8: 8,9                                  # 23 pairs
* PAIR H5: 1,5 COL H
H2: 1,5,2,3,4,8                          # reduction candidate for 1,5
H2: 1,5 => CTR
* 7159326489246873..8634512795.82137966.27.8..3371596824.39....6.4.637..82.5.86943.
H2: 2,3,4,8                              # 21 pairs
H7: 1,5,4,6,8                            # reduction candidate for 1,5
H7: 1,5 => CTR
* 71493.6255.9..7...8.345.1793.521.79.6.279.5.3.715....4.38...9.749637..82.578.9...
H7: 4,6,8                                # 21 pairs
H8: 1,5,8                                # reduction candidate for 1,5
H8: 1,5                                  # 23 pairs
* PAIR G6: 2,8 BLK 6
H6: 2,8,6                                # reduction candidate for 2,8
H6: 6 => CTR
* 71.93.6.......7...8.345.179...2167986.27..513.7.5.3264.3.......4.6371.52.5.8.9...
H6: 2,8                                  # 27 pairs
* PAIR G6: 2,8 COL G
G2: 2,8,1,3,4,5                          # reduction candidate for 2,8
G2: 2,8 => CTR
* 7159326489.4.872358234561795.82137966927....3.7.5...24.3....4..4.637.9.2.5.8493..
G2: 1,3,4,5                              # 21 pairs
* PAIR B8: 8,9 BLK 7
C7: 8,9,1,7                              # reduction candidate for 8,9
C7: 1,7 => CTR
* 71493.6..5.9..7...8.345.1793452167986927....317859326493.......48637.9.225.8.9...
C7: 8,9                                  # 24 pairs
* PAIR B8: 8,9 ROW 8
G8: 8,9,1,5                              # reduction candidate for 8,9
G8: 1,5 => CTR
* 7149386255.9..7...8.345.1793.521.79.6827945.39715.3..4.38...9.749637..82.578.9...
G8: 8,9                                  # 23 pairs
* PAIR B8: 8,9 COL B
B5: 8,9,4                                # reduction candidate for 8,9
B5: 4 => CTR
* 7149326.85...87...8.345..79385214796642798..3.7.563..4.38...9.749637...2.578.9.61
B5: 8,9                                  # 21 pairs
* PAIR A9: 1,2 BLK 7
A7: 1,2,9                                # reduction candidate for 1,2
A7: 9 => CTR
* 71493.6..5.9..7...8.345.1793452167986927....317859326493.......48637.9.225.8.9...
A7: 1,2                                  # 24 pairs
* PAIR C9: 1,7 BLK 7
C7: 1,7,8,9                              # reduction candidate for 1,7
C7: 1,7 => CTR
* 71493.6..5.9..7...8.345.1793452167986927....317859326493.......48637.9.225.8.9...
C7: 8,9                                  # 24 pairs
* PAIR C9: 1,7 ROW 9
I9: 1,7,6                                # reduction candidate for 1,7
I9: 6 => CTR
* 71.93.6.......7..18.3451279...2167986.27....3.7.5....4.3......74.637...2.578.9..6
I9: 1,7                                  # 24 pairs
* PAIR D7: 1,6 BLK 8
F7: 1,6,2,4,5                            # reduction candidate for 1,6
F7: 1,6 => CTR
* 71.9326...2.687.31863451279...21.7966.279...3.7.563824.371.6...4.6375..2.5.8.9.67
F7: 2,4,5                                # 21 pairs
* PAIR D7: 1,6 ROW 7
H7: 1,6,4,5,8                            # reduction candidate for 1,6
H7: 1,6 => CTR
* 71.9326...2.687..1863451279...21.7966.27....3.7.596824.37124.68486375912251869..7
H7: 4,5,8                                # 21 pairs
I7: 1,6,5,7,8                            # reduction candidate for 1,6
I7: 1,6 => CTR
* 71.93.6..5.96.7..18.345..79.4.21.79.6927....3178593264937.....648637.9.2251869..7
I7: 5,7,8                                # 21 pairs
* PAIR F8: 1,5 BLK 8
F7: 1,5,2,4,6                            # reduction candidate for 1,5
F7: 2,4,6 => CTR
* 71.9326...2.687..1863451279.482137966927....3.7.5..824.371.....486375912.518.9..7
F7: 1,5                                  # 28 pairs
* PAIR F8: 1,5 ROW 8
G8: 1,5,8,9                              # reduction candidate for 1,5
G8: 1,5 => CTR
* 7149386255.9..7...8.345.1793.521.79.6827945.39715.3..4.38...9.749637..82.578.9...
G8: 8,9                                  # 23 pairs
H8: 1,5,8                                # reduction candidate for 1,5
H8: 1,5                                  # 23 pairs
* INCONCLUSIVE
* SAVE PR GRAPH zz-www.sudokuoftheday.co.uk-20060411-absurd-base-pr-000.dot
* REASONING
* PRF # C2: 4,5 => SOL
* DIS # C2: 4 => CTR => C2: 5,9
* PRF # E2: 2,6 => SOL
* DIS # F3: 1 => CTR => F3: 2,6
* PRF # E2: 6 => SOL
* PRF # F3: 2 => SOL
* DIS # H1: 5,8 => CTR => H1: 2,4
* DIS # G2: 5,8 => CTR => G2: 1,2,3,4
* DIS # H2: 5,8 => CTR => H2: 1,2,3,4
* DIS # I7: 5,8 => CTR => I7: 1,6,7
* DIS # G2: 1,2 => CTR => G2: 3,4,5,8
* DIS # H2: 1,2 => CTR => H2: 3,4,5,8
* DIS # F3: 6 => CTR => F3: 1,2
* DIS # F4: 4,8 => CTR => F4: 3,6
* DIS # F4: 4,8 => CTR => F4: 3,6
* PRF # H6: 6,8 => SOL
* DIS # I7: 6,8 => CTR => I7: 1,5,7
* DIS # G2: 1,5 => CTR => G2: 2,3,4,8
* DIS # G7: 1,5 => CTR => G7: 4,8,9
* DIS # G8: 1,5 => CTR => G8: 8,9
* DIS # H2: 1,5 => CTR => H2: 2,3,4,8
* DIS # H7: 1,5 => CTR => H7: 4,6,8
* DIS # H6: 6 => CTR => H6: 2,8
* DIS # G2: 2,8 => CTR => G2: 1,3,4,5
* DIS # C7: 1,7 => CTR => C7: 8,9
* DIS # G8: 1,5 => CTR => G8: 8,9
* DIS # B5: 4 => CTR => B5: 8,9
* DIS # A7: 9 => CTR => A7: 1,2
* DIS # C7: 1,7 => CTR => C7: 8,9
* DIS # I9: 6 => CTR => I9: 1,7
* DIS # F7: 1,6 => CTR => F7: 2,4,5
* DIS # H7: 1,6 => CTR => H7: 4,5,8
* DIS # I7: 1,6 => CTR => I7: 5,7,8
* DIS # F7: 2,4,6 => CTR => F7: 1,5
* DIS # G8: 1,5 => CTR => G8: 8,9
* CNT  35 HDP CHAINS /  84 HYP OPENED

--------------------------------------------------
* PREPARE PR GRAPH
* PAIR REDUCTION ..
* LEVEL 0 PASS 1 ROUND 1 (AUTO SOLVE) (A2,A4,A9,B2,B3,B4,B8,C1,C4,C9,D2,D7,F1,F5,F8,G3,G5,G6,H5,I1,I4)
* 71.93.6.......7...8.345..79...21.79.6.27....3.7.5....4.3.......4.637...2.5.8.9...
* PAIR C1: 4,5 BLK 1
C2: 4,5,9                                # reduction candidate for 4,5
C2: 4,5 => SOLVED
* 714938625925167438863452179548213796692784513371596284139625847486371952257849361
* DURATION: 0:00:01.817008  START: 22:19:42.389933  END: 22:19:44.206941 2019-04-30
* SOLUTION FOUND
* SAVE PR GRAPH zz-www.sudokuoftheday.co.uk-20060411-absurd-base-pr-001.dot
* REASONING
* PRF # C2: 4,5 => SOL
* STA C2: 4,5
* CNT   1 HDP CHAINS /   1 HYP OPENED

Header Info

http://www.sudokuoftheday.co.uk/cgi-bin/sudoku1280.cgi?ACTION=archive2&USER=&MONTH=Apr&YEAR=2006, 20060411, absurd

Solution

position: 714938625925167438863452179548213796692784513371596284139625847486371952257849361 solved
Solution

See section Pair Reduction for the HDP chains leading to this result.

Appendix: Full HDP Chains

A1. Pair Reduction Analysis

Full list of HDP chains traversed:

* PRF # C2: 4,5 => SOL
* INC # C2: 9 => UNS
* INC # H1: 4,5 => UNS
* INC # H1: 2,8 => UNS
* INC # C2: 5,9 => UNS
* DIS # C2: 4 => CTR => C2: 5,9
* PRF # E2: 2,6 => SOL
* INC # E2: 8 => UNS
* INC # F3: 2,6 => UNS
* DIS # F3: 1 => CTR => F3: 2,6
* INC # E2: 2,8 => UNS
* PRF # E2: 6 => SOL
* INC # H1: 2,8 => UNS
* INC # H1: 4,5 => UNS
* INC # F3: 1,6 => UNS
* PRF # F3: 2 => SOL
* DIS # H1: 5,8 => CTR => H1: 2,4
* INC # H1: 2,4 => UNS
* DIS # G2: 5,8 => CTR => G2: 1,2,3,4
* INC # G2: 1,2,3,4 => UNS
* DIS # H2: 5,8 => CTR => H2: 1,2,3,4
* INC # H2: 1,2,3,4 => UNS
* INC # I2: 5,8 => UNS
* DIS # I7: 5,8 => CTR => I7: 1,6,7
* INC # I7: 1,6,7 => UNS
* DIS # G2: 1,2 => CTR => G2: 3,4,5,8
* INC # G2: 3,4,5,8 => UNS
* DIS # H2: 1,2 => CTR => H2: 3,4,5,8
* INC # H2: 3,4,5,8 => UNS
* INC # F3: 1,2 => UNS
* DIS # F3: 6 => CTR => F3: 1,2
* INC # B5: 4,8 => UNS
* INC # B5: 9 => UNS
* DIS # F4: 4,8 => CTR => F4: 3,6
* INC # F4: 3,6 => UNS
* DIS # F4: 4,8 => CTR => F4: 3,6
* INC # F4: 3,6 => UNS
* INC # E5: 4,8 => UNS
* INC # B5: 4,8 => UNS
* INC # B5: 9 => UNS
* PRF # H6: 6,8 => SOL
* INC # H6: 2 => UNS
* INC # F4: 6,8 => UNS
* INC # F4: 3,4 => UNS
* DIS # I7: 6,8 => CTR => I7: 1,5,7
* INC # I7: 1,5,7 => UNS
* DIS # G2: 1,5 => CTR => G2: 2,3,4,8
* INC # G2: 2,3,4,8 => UNS
* DIS # G7: 1,5 => CTR => G7: 4,8,9
* INC # G7: 4,8,9 => UNS
* DIS # G8: 1,5 => CTR => G8: 8,9
* INC # G8: 8,9 => UNS
* DIS # H2: 1,5 => CTR => H2: 2,3,4,8
* INC # H2: 2,3,4,8 => UNS
* DIS # H7: 1,5 => CTR => H7: 4,6,8
* INC # H7: 4,6,8 => UNS
* INC # H8: 1,5 => UNS
* INC # H6: 2,8 => UNS
* DIS # H6: 6 => CTR => H6: 2,8
* DIS # G2: 2,8 => CTR => G2: 1,3,4,5
* INC # G2: 1,3,4,5 => UNS
* INC # C7: 8,9 => UNS
* DIS # C7: 1,7 => CTR => C7: 8,9
* INC # G8: 8,9 => UNS
* DIS # G8: 1,5 => CTR => G8: 8,9
* INC # B5: 8,9 => UNS
* DIS # B5: 4 => CTR => B5: 8,9
* INC # A7: 1,2 => UNS
* DIS # A7: 9 => CTR => A7: 1,2
* DIS # C7: 1,7 => CTR => C7: 8,9
* INC # C7: 8,9 => UNS
* INC # I9: 1,7 => UNS
* DIS # I9: 6 => CTR => I9: 1,7
* DIS # F7: 1,6 => CTR => F7: 2,4,5
* INC # F7: 2,4,5 => UNS
* DIS # H7: 1,6 => CTR => H7: 4,5,8
* INC # H7: 4,5,8 => UNS
* DIS # I7: 1,6 => CTR => I7: 5,7,8
* INC # I7: 5,7,8 => UNS
* INC # F7: 1,5 => UNS
* DIS # F7: 2,4,6 => CTR => F7: 1,5
* DIS # G8: 1,5 => CTR => G8: 8,9
* INC # G8: 8,9 => UNS
* INC # H8: 1,5 => UNS
* CNT  84 HDP CHAINS /  84 HYP OPENED

A2. Pair Reduction

Full list of HDP chains traversed:

* PRF # C2: 4,5 => SOL
* STA C2: 4,5
* CNT   1 HDP CHAINS /   1 HYP OPENED