Analysis of zz-www.sudokuoftheday.co.uk-20060430-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: .6..5.1...3........476...9.4..2......9..6351.....8.6........4.3....72..15.....28. initial

Autosolve

position: .6..5.1...35.......476...954.62......9..6351.....8.6........4.3.8..729.15.....28. autosolve
Autosolve

Pair Reduction Variants

Pair Reduction Analysis

Pair Reduction Analysis

The following important HDP chains were detected:

* DIS # H2: 2,4 => CTR => H2: 6,7
* DIS # I2: 2,4 => CTR => I2: 6,7,8
* DIS # A3: 2 => CTR => A3: 1,8
* DIS # F7: 1,8 => CTR => F7: 5,6,9
* DIS # I2: 7,8 => CTR => I2: 2,4,6
* DIS # G4: 3 => CTR => G4: 7,8
* DIS # C1: 9 => CTR => C1: 2,8
* DIS # D1: 4,7 => CTR => D1: 3,8,9
* DIS # D2: 4,7 => CTR => D2: 1,8,9
* DIS # H1: 3,7 => CTR => H1: 2,4
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # B7: 1,7 => CTR => B7: 2
* DIS # D7: 1,9 => CTR => D7: 5,8
* DIS # F7: 1,9 => CTR => F7: 5,6,8
* DIS # F9: 1,9 => CTR => F9: 4,6
* DIS # C7: 2 => CTR => C7: 1,9
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # D9: 3,4 => CTR => D9: 1,9
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # H7: 5,6 => SOL
* DIS # H7: 7 => CTR => H7: 5,6
* PRF # H7: 6,7 => SOL
* DIS # H7: 5 => CTR => H7: 6,7
* DIS # I2: 2,4,8 => CTR => I2: 6,7
* CNT  29 HDP CHAINS /  67 HYP OPENED

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

Pair Reduction

Pair Reduction

The following important HDP chains were detected:

* DIS # H2: 2,4 => CTR => H2: 6,7
* DIS H2: 6,7 # F7: 1,8 => CTR => F7: 5,6,9
* DIS H2: 6,7 + F7: 5,6,9 # I1: 7,8 => CTR => I1: 2,4
* DIS H2: 6,7 + F7: 5,6,9 + I1: 2,4 # I2: 7,8 => CTR => I2: 6
* PRF H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6 => SOL
* STA H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6
* CNT   5 HDP CHAINS /   8 HYP OPENED

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

Details

Positions

.6..5.1...3........476...9.4..2......9..6351.....8.6........4.3....72..15.....28. initial
.6..5.1...35.......476...954.62......9..6351.....8.6........4.3.8..729.15.....28. autosolve
968357142235149876147628395456291738892763514371584629729815463683472951514936287 solved

Classification

level: medium

Pairing Analysis

--------------------------------------------------
* PAIRS (16)
E2: 2,4
E3: 2,3
F3: 1,8
G2: 7,8
G3: 3,8
C5: 2,8
E4: 1,9
D5: 4,7
H4: 3,7
A8: 3,6
C8: 3,4
B9: 1,7
E7: 1,9
E9: 3,4
H8: 5,6
I9: 6,7

--------------------------------------------------
* CONSTRAINT PAIRS (AUTO SOLVE)
A2,A3: 1.. / A2 = 1  => 16 pairs (_) / A3 = 1  => 13 pairs (_)
A3,F3: 1.. / A3 = 1  => 13 pairs (_) / F3 = 1  => 16 pairs (_)
E4,E7: 1.. / E4 = 1  =>  0 pairs (X) / E7 = 1  => 23 pairs (_)
E2,E3: 2.. / E2 = 2  =>  0 pairs (X) / E3 = 2  => 14 pairs (_)
A3,E3: 2.. / A3 = 2  =>  0 pairs (X) / E3 = 2  => 14 pairs (_)
B6,B7: 2.. / B6 = 2  =>  0 pairs (X) / B7 = 2  => 21 pairs (_)
D1,E3: 3.. / D1 = 3  => 14 pairs (_) / E3 = 3  =>  0 pairs (X)
H1,G3: 3.. / H1 = 3  =>  0 pairs (X) / G3 = 3  => 14 pairs (_)
A6,C6: 3.. / A6 = 3  =>  0 pairs (*) / C6 = 3  =>  0 pairs (X)
G4,H4: 3.. / G4 = 3  =>  0 pairs (X) / H4 = 3  => 14 pairs (_)
D1,H1: 3.. / D1 = 3  => 14 pairs (_) / H1 = 3  =>  0 pairs (X)
E3,G3: 3.. / E3 = 3  =>  0 pairs (X) / G3 = 3  => 14 pairs (_)
A6,A8: 3.. / A6 = 3  =>  0 pairs (*) / A8 = 3  =>  0 pairs (X)
E3,E9: 3.. / E3 = 3  =>  0 pairs (X) / E9 = 3  => 14 pairs (_)
G3,G4: 3.. / G3 = 3  => 14 pairs (_) / G4 = 3  =>  0 pairs (X)
H1,H4: 3.. / H1 = 3  =>  0 pairs (X) / H4 = 3  => 14 pairs (_)
C8,C9: 4.. / C8 = 4  => 16 pairs (_) / C9 = 4  =>  0 pairs (*)
D5,I5: 4.. / D5 = 4  => 16 pairs (_) / I5 = 4  => 23 pairs (_)
C8,D8: 4.. / C8 = 4  => 16 pairs (_) / D8 = 4  =>  0 pairs (*)
E2,E9: 4.. / E2 = 4  => 14 pairs (_) / E9 = 4  =>  0 pairs (X)
B4,B6: 5.. / B4 = 5  => 16 pairs (_) / B6 = 5  => 23 pairs (_)
H7,H8: 5.. / H7 = 5  =>  0 pairs (X) / H8 = 5  =>  0 pairs (_)
B4,F4: 5.. / B4 = 5  => 16 pairs (_) / F4 = 5  => 23 pairs (_)
D8,H8: 5.. / D8 = 5  =>  0 pairs (X) / H8 = 5  =>  0 pairs (_)
H2,I2: 6.. / H2 = 6  =>  0 pairs (X) / I2 = 6  =>  0 pairs (_)
A7,A8: 6.. / A7 = 6  =>  0 pairs (X) / A8 = 6  =>  0 pairs (_)
F7,F9: 6.. / F7 = 6  =>  0 pairs (X) / F9 = 6  =>  0 pairs (_)
A8,H8: 6.. / A8 = 6  =>  0 pairs (*) / H8 = 6  =>  0 pairs (X)
F9,I9: 6.. / F9 = 6  =>  0 pairs (*) / I9 = 6  =>  0 pairs (X)
I2,I9: 6.. / I2 = 6  =>  0 pairs (*) / I9 = 6  =>  0 pairs (X)
H7,I9: 7.. / H7 = 7  =>  0 pairs (X) / I9 = 7  =>  0 pairs (_)
B9,I9: 7.. / B9 = 7  =>  0 pairs (X) / I9 = 7  =>  0 pairs (_)
G2,G4: 7.. / G2 = 7  => 16 pairs (_) / G4 = 7  => 15 pairs (_)
A5,C5: 8.. / A5 = 8  => 23 pairs (_) / C5 = 8  => 17 pairs (_)
G4,I4: 8.. / G4 = 8  => 15 pairs (_) / I4 = 8  => 20 pairs (_)
D7,F7: 8.. / D7 = 8  => 16 pairs (_) / F7 = 8  =>  0 pairs (X)
C1,C5: 8.. / C1 = 8  => 23 pairs (_) / C5 = 8  => 17 pairs (_)
I4,I6: 9.. / I4 = 9  =>  0 pairs (X) / I6 = 9  => 20 pairs (_)
E4,E7: 9.. / E4 = 9  => 23 pairs (_) / E7 = 9  =>  0 pairs (X)
* DURATION: 0:00:42.825019  START: 22:46:22.572553  END: 22:47:05.397572 2019-04-30
* CP COUNT: (39)
* SOLUTION FOUND

--------------------------------------------------
* PREPARE PR GRAPH
* PAIR REDUCTION ..
* LEVEL 0 PASS 1 ROUND 1 (AUTO SOLVE) (A8,B9,C5,C8,D5,E2,E3,E4,E7,E9,F3,G2,G3,H4,H8,I9)
* .6..5.1...35.......476...954.62......9..6351.....8.6........4.3.8..729.15.....28.
* PAIR E2: 2,4 ROW 2
H2: 2,4,6,7                              # reduction candidate for 2,4
H2: 2,4 => CTR
* .6.35.1...3514.826147628395456291738.9..6351232158.6.9...81546368..7295151.936287
H2: 6,7                                  # 17 pairs
I2: 2,4,6,7,8                            # reduction candidate for 2,4
I2: 2,4 => CTR
* .6..5.1...35....6..476...954.62......9..6351.3...8.6.......647368..729515.....286
I2: 6,7,8                                # 16 pairs
* PAIR F3: 1,8 BLK 2
D2: 1,8,4,7,9                            # reduction candidate for 1,8
D2: 1,8                                  # 17 pairs
F2: 1,8,4,7,9                            # reduction candidate for 1,8
F2: 1,8                                  # 17 pairs
* PAIR F3: 1,8 ROW 3
A3: 1,8,2                                # reduction candidate for 1,8
A3: 2 => CTR
* .68.5.132135.2.746247631895456219378892763514.71.8.629729...4.3.84.729.151..46287
A3: 1,8                                  # 14 pairs
* PAIR F3: 1,8 COL F
F7: 1,8,5,6,9                            # reduction candidate for 1,8
F7: 1,8 => CTR
* .6..5.1...351....6.476...954.62......9..6351.3.1.8.6.....5.846368..7295151...6287
F7: 5,6,9                                # 16 pairs
* PAIR G2: 7,8 BLK 3
I1: 7,8,2,4                              # reduction candidate for 7,8
I1: 7,8                                  # 18 pairs
I2: 7,8,2,4,6                            # reduction candidate for 7,8
I2: 7,8 => CTR
* .6..5.1...35....6..476...954.62......9..6351.3...8.6.......647368..729515.....286
I2: 2,4,6                                # 16 pairs
* PAIR G2: 7,8 ROW 2
D2: 7,8,1,4,9                            # reduction candidate for 7,8
D2: 7,8                                  # 19 pairs
F2: 7,8,1,4,9                            # reduction candidate for 7,8
F2: 7,8                                  # 19 pairs
* PAIR G2: 7,8 COL G
G4: 7,8,3                                # reduction candidate for 7,8
G4: 3 => CTR
* .6..5.13.135.2.746247631895456219378.9..63514..1.8.629.29...4.3.8..729.151..46287
G4: 7,8                                  # 14 pairs
* PAIR G3: 3,8 COL G
G4: 3,8,7                                # reduction candidate for 3,8
G4: 3,8                                  # 16 pairs
G4: 7                                    # 15 pairs
* PAIR C5: 2,8 BLK 4
A5: 2,8,7                                # reduction candidate for 2,8
A5: 2,8                                  # 24 pairs
A5: 7                                    # 18 pairs
* PAIR C5: 2,8 COL C
C1: 2,8,9                                # reduction candidate for 2,8
C1: 9 => CTR
* .69.5.13..35129.7..476...954.629....798463512321.8.649972.1.463684372951513946287
C1: 2,8                                  # 21 pairs
* PAIR E4: 1,9 BLK 5
F4: 1,9,5,7                              # reduction candidate for 1,9
F4: 1,9                                  # 20 pairs
D6: 1,9,4,5,7                            # reduction candidate for 1,9
D6: 1,9                                  # 18 pairs
F6: 1,9,4,5,7                            # reduction candidate for 1,9
F6: 1,9                                  # 18 pairs
* PAIR D5: 4,7 BLK 5
D6: 4,7,1,5,9                            # reduction candidate for 4,7
D6: 4,7                                  # 17 pairs
F6: 4,7,1,5,9                            # reduction candidate for 4,7
F6: 4,7                                  # 17 pairs
* PAIR D5: 4,7 ROW 5
I5: 4,7,2                                # reduction candidate for 4,7
I5: 4,7                                  # 24 pairs
I5: 2                                    # 18 pairs
* PAIR D5: 4,7 COL D
D1: 4,7,3,8,9                            # reduction candidate for 4,7
D1: 4,7 => CTR
* .6..5.132135.2.746247631895456219378.92.63514.71.8.629729...4.3.84.729.151..46287
D1: 3,8,9                                # 16 pairs
D2: 4,7,1,8,9                            # reduction candidate for 4,7
D2: 4,7 => CTR
* .6..5.1...35.......476..3954.62...3..9..6351.....8.6........4.3.84.729.15...34286
D2: 1,8,9                                # 16 pairs
* PAIR H4: 3,7 BLK 6
G4: 3,7,8                                # reduction candidate for 3,7
G4: 3,7                                  # 20 pairs
G4: 8                                    # 15 pairs
* PAIR H4: 3,7 COL H
H1: 3,7,2,4                              # reduction candidate for 3,7
H1: 3,7 => CTR
* .6.35.17..35147826147628395456291738.9..63512321.8.6.9...81546368..7295151.936287
H1: 2,4                                  # 15 pairs
* PAIR C8: 3,4 BLK 7
C9: 3,4,1,9                              # reduction candidate for 3,4
C9: 3,4 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
C9: 1,9 => CTR
* .6..5.1...35.....6.476...954.62......9..6351...3.8.6..672...45338457296151...6287
* PAIR C8: 3,4 ROW 8
D8: 3,4,5                                # reduction candidate for 3,4
D8: 3,4 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
D8: 5 => CTR
* .6..5.1...35.....6.476...954.62......9..6351.....8.6..672...453384572961519..6287
* PAIR B9: 1,7 BLK 7
B7: 1,7,2                                # reduction candidate for 1,7
B7: 1,7 => CTR
* .6..5.13..35.2....24763189545621.378798463512321.8.6499.....4.36843729515.3.4.28.
B7: 2                                    # 21 pairs
* PAIR B9: 1,7 COL B
B4: 1,7,5                                # reduction candidate for 1,7
B4: 1,7                                  # 23 pairs
B6: 1,7,2,5                              # reduction candidate for 1,7
B6: 1,7                                  # 22 pairs
* PAIR E7: 1,9 BLK 8
D7: 1,9,5,8                              # reduction candidate for 1,9
D7: 1,9 => CTR
* .6..5.1...35.....6.476.1.954.62......9..6351.....8.6..672..8453384572961519..6287
D7: 5,8                                  # 17 pairs
F7: 1,9,5,6,8                            # reduction candidate for 1,9
F7: 1,9 => CTR
* .6..5.1...35.....6.476...954.62......9..6351.....8.6..6728..453384572961519..6287
F7: 5,6,8                                # 16 pairs
D9: 1,9,3,4                              # reduction candidate for 1,9
D9: 1,9                                  # 19 pairs
F9: 1,9,4,6                              # reduction candidate for 1,9
F9: 1,9 => CTR
* .6..5.1...35.......476...954.62......9..6351.....8.6.......64.368..729515.....286
F9: 4,6                                  # 17 pairs
* PAIR E7: 1,9 ROW 7
C7: 1,9,2                                # reduction candidate for 1,9
C7: 2 => CTR
* .69.5.13..35129..6.476...954562.....798463512321.8.6..9.2.1.4.3684372951513946287
C7: 1,9                                  # 21 pairs
* PAIR E9: 3,4 BLK 8
D8: 3,4,5                                # reduction candidate for 3,4
D8: 3,4 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
D8: 5 => CTR
* .6..5.1...35.....6.476...954.62......9..6351.....8.6..672...453384572961519..6287
D9: 3,4,1,9                              # reduction candidate for 3,4
D9: 3,4 => CTR
* .6..5.1...35.....6.476...954.62......9..6351...3.8.6..672...4533845729615....6287
D9: 1,9                                  # 19 pairs
* PAIR E9: 3,4 ROW 9
C9: 3,4,1,9                              # reduction candidate for 3,4
C9: 3,4 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
C9: 1,9 => CTR
* .6..5.1...35.....6.476...954.62......9..6351...3.8.6..672...45338457296151...6287
* PAIR H8: 5,6 BLK 9
H7: 5,6,7                                # reduction candidate for 5,6
H7: 5,6 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
H7: 7 => CTR
* .6..5.1...35....6..476...954.62...3..9..6351.....8.6.......647368..7295157....286
* PAIR I9: 6,7 BLK 9
H7: 6,7,5                                # reduction candidate for 6,7
H7: 6,7 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
H7: 5 => CTR
* .6..5.1...35.....6.476...954.62......9..6351.....8.6..672...453384572961519..6287
* PAIR I9: 6,7 COL I
I2: 6,7,2,4,8                            # reduction candidate for 6,7
I2: 2,4,8 => CTR
* .6..5.1...35....6..476...954.62......9..6351.3...8.6.......647368..729515.....286
I2: 6,7                                  # 19 pairs
* INCONCLUSIVE
* SAVE PR GRAPH zz-www.sudokuoftheday.co.uk-20060430-absurd-base-pr-000.dot
* REASONING
* DIS # H2: 2,4 => CTR => H2: 6,7
* DIS # I2: 2,4 => CTR => I2: 6,7,8
* DIS # A3: 2 => CTR => A3: 1,8
* DIS # F7: 1,8 => CTR => F7: 5,6,9
* DIS # I2: 7,8 => CTR => I2: 2,4,6
* DIS # G4: 3 => CTR => G4: 7,8
* DIS # C1: 9 => CTR => C1: 2,8
* DIS # D1: 4,7 => CTR => D1: 3,8,9
* DIS # D2: 4,7 => CTR => D2: 1,8,9
* DIS # H1: 3,7 => CTR => H1: 2,4
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # B7: 1,7 => CTR => B7: 2
* DIS # D7: 1,9 => CTR => D7: 5,8
* DIS # F7: 1,9 => CTR => F7: 5,6,8
* DIS # F9: 1,9 => CTR => F9: 4,6
* DIS # C7: 2 => CTR => C7: 1,9
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # D9: 3,4 => CTR => D9: 1,9
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # H7: 5,6 => SOL
* DIS # H7: 7 => CTR => H7: 5,6
* PRF # H7: 6,7 => SOL
* DIS # H7: 5 => CTR => H7: 6,7
* DIS # I2: 2,4,8 => CTR => I2: 6,7
* CNT  29 HDP CHAINS /  67 HYP OPENED

--------------------------------------------------
* PREPARE PR GRAPH
* PAIR REDUCTION ..
* LEVEL 0 PASS 1 ROUND 1 (AUTO SOLVE) (A8,B9,C5,C8,D5,E2,E3,E4,E7,E9,F3,G2,G3,H4,H8,I9)
* .6..5.1...35.......476...954.62......9..6351.....8.6........4.3.8..729.15.....28.
* PAIR E2: 2,4 ROW 2
H2: 2,4,6,7                              # reduction candidate for 2,4
H2: 2,4 => CTR
* .6.35.1...3514.826147628395456291738.9..6351232158.6.9...81546368..7295151.936287
* PAIR RESTART
* PAIR F3: 1,8 BLK 2
D2: 1,8,7,9                              # reduction candidate for 1,8
D2: 1,8                                  # 21 pairs
F2: 1,8,7,9                              # reduction candidate for 1,8
F2: 1,8                                  # 20 pairs
* PAIR F3: 1,8 COL F
F7: 1,8,5,6,9                            # reduction candidate for 1,8
F7: 1,8 => CTR
* .6.357142235.4.8761476283954562..738.92763514.71584629729...4.3.8..729.151..36287
* PAIR RESTART
* PAIR F3: 1,8 BLK 2
F2: 1,8,7,9                              # reduction candidate for 1,8
F2: 1,8                                  # 20 pairs
F2: 7,9                                  # 18 pairs
* PAIR G2: 7,8 BLK 3
I1: 7,8,2,4                              # reduction candidate for 7,8
I1: 7,8 => CTR
* .6.35.14..35.4..62.4762.3954.62...3..9..6351.....8.62..2.8.64.3.8..729.15...3.286
I2: 7,8,6                                # reduction candidate for 7,8
I2: 7,8 => CTR
* .6.3571..235.4..6.1476283954.62...3..9..6351.....8.6.....8..4736834729.15...3.28.
I2: 6 => SOLVED
* 968357142235149876147628395456291738892763514371584629729815463683472951514936287
* DURATION: 0:00:06.520749  START: 22:47:42.836449  END: 22:47:49.357198 2019-04-30
* SOLUTION FOUND
* SAVE PR GRAPH zz-www.sudokuoftheday.co.uk-20060430-absurd-base-pr-001.dot
* REASONING
* DIS # H2: 2,4 => CTR => H2: 6,7
* DIS H2: 6,7 # F7: 1,8 => CTR => F7: 5,6,9
* DIS H2: 6,7 + F7: 5,6,9 # I1: 7,8 => CTR => I1: 2,4
* DIS H2: 6,7 + F7: 5,6,9 + I1: 2,4 # I2: 7,8 => CTR => I2: 6
* PRF H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6 => SOL
* STA H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6
* CNT   5 HDP CHAINS /   8 HYP OPENED

Header Info

http://www.sudokuoftheday.co.uk/cgi-bin/sudoku1280.cgi?ACTION=archive2&USER=&MONTH=Apr&YEAR=2006, 20060430, absurd

Solution

position: 968357142235149876147628395456291738892763514371584629729815463683472951514936287 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:

* DIS # H2: 2,4 => CTR => H2: 6,7
* INC # H2: 6,7 => UNS
* DIS # I2: 2,4 => CTR => I2: 6,7,8
* INC # I2: 6,7,8 => UNS
* INC # D2: 1,8 => UNS
* INC # F2: 1,8 => UNS
* INC # A3: 1,8 => UNS
* DIS # A3: 2 => CTR => A3: 1,8
* DIS # F7: 1,8 => CTR => F7: 5,6,9
* INC # F7: 5,6,9 => UNS
* INC # I1: 7,8 => UNS
* DIS # I2: 7,8 => CTR => I2: 2,4,6
* INC # I2: 2,4,6 => UNS
* INC # D2: 7,8 => UNS
* INC # F2: 7,8 => UNS
* INC # G4: 7,8 => UNS
* DIS # G4: 3 => CTR => G4: 7,8
* INC # G4: 3,8 => UNS
* INC # G4: 7 => UNS
* INC # A5: 2,8 => UNS
* INC # A5: 7 => UNS
* INC # C1: 2,8 => UNS
* DIS # C1: 9 => CTR => C1: 2,8
* INC # F4: 1,9 => UNS
* INC # D6: 1,9 => UNS
* INC # F6: 1,9 => UNS
* INC # D6: 4,7 => UNS
* INC # F6: 4,7 => UNS
* INC # I5: 4,7 => UNS
* INC # I5: 2 => UNS
* DIS # D1: 4,7 => CTR => D1: 3,8,9
* INC # D1: 3,8,9 => UNS
* DIS # D2: 4,7 => CTR => D2: 1,8,9
* INC # D2: 1,8,9 => UNS
* INC # G4: 3,7 => UNS
* INC # G4: 8 => UNS
* DIS # H1: 3,7 => CTR => H1: 2,4
* INC # H1: 2,4 => UNS
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # B7: 1,7 => CTR => B7: 2
* INC # B7: 2 => UNS
* INC # B4: 1,7 => UNS
* INC # B6: 1,7 => UNS
* DIS # D7: 1,9 => CTR => D7: 5,8
* INC # D7: 5,8 => UNS
* DIS # F7: 1,9 => CTR => F7: 5,6,8
* INC # F7: 5,6,8 => UNS
* INC # D9: 1,9 => UNS
* DIS # F9: 1,9 => CTR => F9: 4,6
* INC # F9: 4,6 => UNS
* INC # C7: 1,9 => UNS
* DIS # C7: 2 => CTR => C7: 1,9
* PRF # D8: 3,4 => SOL
* DIS # D8: 5 => CTR => D8: 3,4
* DIS # D9: 3,4 => CTR => D9: 1,9
* INC # D9: 1,9 => UNS
* PRF # C9: 3,4 => SOL
* DIS # C9: 1,9 => CTR => C9: 3,4
* PRF # H7: 5,6 => SOL
* DIS # H7: 7 => CTR => H7: 5,6
* PRF # H7: 6,7 => SOL
* DIS # H7: 5 => CTR => H7: 6,7
* INC # I2: 6,7 => UNS
* DIS # I2: 2,4,8 => CTR => I2: 6,7
* CNT  67 HDP CHAINS /  67 HYP OPENED

A2. Pair Reduction

Full list of HDP chains traversed:

* DIS # H2: 2,4 => CTR => H2: 6,7
* INC H2: 6,7 # D2: 1,8 => UNS
* INC H2: 6,7 # F2: 1,8 => UNS
* DIS H2: 6,7 # F7: 1,8 => CTR => F7: 5,6,9
* INC H2: 6,7 + F7: 5,6,9 # F2: 1,8 => UNS
* INC H2: 6,7 + F7: 5,6,9 # F2: 7,9 => UNS
* DIS H2: 6,7 + F7: 5,6,9 # I1: 7,8 => CTR => I1: 2,4
* DIS H2: 6,7 + F7: 5,6,9 + I1: 2,4 # I2: 7,8 => CTR => I2: 6
* PRF H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6 => SOL
* STA H2: 6,7 + F7: 5,6,9 + I1: 2,4 + I2: 6
* CNT   9 HDP CHAINS /   8 HYP OPENED