MARGINALIA & WORKING NOTES
Notes
3 notesIdeas that sit beside the puzzles: techniques, proofs, diagrams, and questions worth extending.
Invariants as Conservation Laws
A practical way to search for the quantity a legal move cannot change.
6 min readWhen Symmetry Counts Too MuchOrbit thinking, Burnside’s lemma, and the warning signs of accidental overcounting.
8 min readDrawing the Right DiagramWhy one auxiliary line can be more valuable than a page of algebra.
5 min read