777Sizzling

777Sizzling — Route every connection without crossing a single trace.

777Sizzling is a routing puzzle set on a printed circuit board. Pads sit on a grid, each pair has to be joined with a copper trace, and no two traces may cross. Simple ✨ to start 🚀, and quickly a real planning problem: the order you route 🧭 in decides whether the last connection has anywhere left to go.

THE ROUTING BENCH
The bench is the board itself. Drag ✋ a trace from pad to pad along the grid, undo a route 🧭 that boxes you in, and watch 👀 the counter of routed copper climb. A board is solved when every pair is connected and nothing overlaps — and the check ✅ is automatic, so you always know where you stand.

TWELVE BOARDS, FOUR TIERS
Boards are grouped into Intro, Standard, Dense and Prototype, from a three-pad sensor breakout up to layouts where every free 🆓 cell matters. The board index shows completion by tier, a star rating and a score 🔢 for each board, so it is obvious what is finished and what is still open. Search 🔍 when the list 📋 grows.

COPPER VIEWER
Solved boards can be reopened in the copper viewer to study 📖 the finished layout — the route 🧭 you found, laid out clean 🧼, worth a look before you attempt the next tier.

BOARD DESIGNER
Build 🔨 your own boards: place the pads, set the pairs, save 💾 the layout to the Custom tier and solve it yourself, or leave it as a problem to come back to.

FABRICATION LOG AND YIELD REPORT 📝
Every solved run is logged, and the yield report 🧾 tracks six milestones 🏅 across your whole history ⏳ — a slow-burn record of how your routing has improved rather than a single score 🔢.

HANDBOOK
A short handbook explains the ideas the puzzles are built on: why ❓ traces cannot cross, why routing order matters, and how to read a dense board before touching it.

No timers, no lives, no network. 777Sizzling is for anyone who likes a clean 🧼 logic puzzle, and for people who work with electronics and will recognise exactly what the board is asking for. 777Sizzling turns careful routing into a focused challenge where every connection counts.