Masyu

Masyu, an original pearl-loop adaptation with twelve uniquely solved 5×5, 6×6 and 7×7 puzzles and seeded rotations/reflections. One orthogonal closed circuit visits every pearl without crossing or branching. White pearls require straight passage and a turn in at least one neighboring cell; black pearls require a corner and straight continuation through both neighboring cells. Unused cells and optional cross notes are allowed. Preview direct drag strokes, toggle edges by mouse/touch, use standard keyboard controls and a direction keypad. Solo has counted optional hints. Exact local 2 hides each independent board during handoff and keeps separate active clocks. Exact online 2/3/4 race the same valid puzzle for eight minutes; submitted loops are rule-checked, solved boards rank by host-observed time and unfinished boards tie last. Casual host-managed results are unverified; departure aborts safely, without reconnect or host migration. Original ivory pearls, slate/copper board and synthesis audio. Bounded native cells, zoom, English/PT Help and rematch; portrait preferred, landscape supported.

Drag between adjacent cell centers to preview a line stroke; release inside commits. Click/tap an edge toggles its line; right-click/450ms touch toggles cross. Arrows/WASD move; Shift+arrows draws; direction keypad selects edge; Space toggles line, X cross, Delete erases, Enter checks separately. Ctrl/Cmd+Z Undo; Ctrl/Cmd+Shift+Z or Ctrl+Y Redo. Esc pause/resume solo/local, M mute, R confirmed restart, H counted solo hint. Zoom, EN/PT Help; exact local2 private handoff; online2/3/4 eight-minute same-puzzle races with live Help. Casual unverified outcomes. Portrait preferred; landscape supported.