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- Uniqueness Clue Cover (16:18, 25 October 2021)
- B/B Plot (16:30, 25 October 2021)
- Forcing Net (16:34, 25 October 2021)
- Forcing Chain (16:34, 25 October 2021)
- Eureka (16:47, 25 October 2021)
- Alternating Inference Chain (16:47, 25 October 2021)
- Double Implication Chain (16:48, 25 October 2021)
- Discontinuous (16:51, 25 October 2021)
- Nice Loop (16:54, 25 October 2021)
- Bridge (16:56, 25 October 2021)
- XY-Chain (17:05, 25 October 2021)
- SSTS (17:11, 25 October 2021)
- Remote Pairs (17:15, 25 October 2021)
- Generalized Fishy Cycles (17:17, 25 October 2021)
- Guardian (17:19, 25 October 2021)
- Broken Wing (17:20, 25 October 2021)
- Verity (17:22, 25 October 2021)
- Oriented Chains (17:28, 25 October 2021)
- Oriented 3D chains (17:30, 25 October 2021)
- Pivot (17:37, 25 October 2021)
- Pincer (17:39, 25 October 2021)
- XYZ-Wing (17:42, 25 October 2021)
- Restricted common (17:48, 25 October 2021)
- WXYZ-Wing (17:49, 25 October 2021)
- W-Wing (17:51, 25 October 2021)
- ALS-XZ (18:27, 25 October 2021)
- ALS-XY-Wing (18:35, 25 October 2021)
- ALS-XY-Chain (18:37, 25 October 2021)
- Canonical grid (18:50, 25 October 2021)
- Asymmetrical (18:58, 25 October 2021)
- Mathematically equivalent (18:58, 25 October 2021)
- Death Blossom (19:00, 25 October 2021)
- Almost ALS (19:01, 25 October 2021)
- Aligned Triple Exclusion (19:11, 25 October 2021)
- Subset Exclusion (19:13, 25 October 2021)
- Sue de Coq (19:16, 25 October 2021)
- Subset Counting (19:19, 25 October 2021)
- Braid (19:37, 25 October 2021)
- Rope (19:39, 25 October 2021)
- Strand (19:40, 25 October 2021)
- Braid Analysis (19:41, 25 October 2021)
- Constraint Subsets (19:42, 25 October 2021)
- Pencil and paper (19:46, 25 October 2021)
- Gurth's Symmetrical Placement (19:53, 25 October 2021)
- Tabling (19:54, 25 October 2021)
- Graded Equivalence Marks (19:57, 25 October 2021)
- Bowman Bingo (20:01, 25 October 2021)
- Nishio (20:02, 25 October 2021)
- Dancing Links (20:05, 25 October 2021)
- Backtracking Algorithms (20:05, 25 October 2021)