Jane Street · July 2026
Solved correctly. Listed on Jane Street's solution page under correct submissions as Abdessamed Zetroni (ENSIA '27), one of 1,139 correct entries.
answer
33609
write cadence
K = 7
tour
54 moves
final score
59400
- Two puzzles in one: a self-avoiding 3-D knight's tour hitting all 13 towers, over a score chain of +N, ×N and ÷N.
- Only 12 scores are printed, on an unknown schedule. Working the arithmetic between them pinned the cadence at K = 7.
- Built an interactive solver instead of brute-forcing: live legal moves, clue checks, and a region audit that kills dead branches early.
- Certified by a from-scratch verifier, because the tool that finds an answer shouldn't be the one that confirms it.
ReactPythonConstraint searchSVG