Shikaku

Shikaku with original uniquely solved 5×5, 7×7 and 9×9 rectangle-area puzzles. Cover every cell with non-overlapping rectangles, one clue each, with the exact numbered area. Direct mouse/touch drag and two taps, standard keyboard two-corner placement, a native outside keypad, pencil notes, dense zoom, English/PT Help and original graphics and audio. Solo has optional counted whole-rectangle hints. Exactly two local humans use hidden independent boards, private handoff and active clocks. Exact online 2/3/4 races the same seeded challenge for eight minutes; full solution checks, host-observed finish ranks and unfinished seats tied last. Casual host-managed results are unverified. Departure/background aborts, with no reconnect or host migration. Complete rematch.

Drag opposite corner tiles previews a rectangle; release inside places. Two taps or Space first corner then Space at opposite corner; arrows/WASD immediate cursor. Outside row/column and1anchor/2place keypad. Delete clears entire selected parcel;Enter separate check;X/right-click/450ms touch pencil note,Ptool. Ctrl/Cmd+Z Undo,Ctrl/Cmd+Shift+Z or Ctrl+Y Redo. Escape cancels pending corner,closes Help,then solo/local pause/resume;online Help stays live. Mmute,Rconfirmed restart,Hcounted whole-rectangle solo hint. Dense zoom,EN/PT,local2 private handoff/active clocks,online exact2/3/4 eight-minute same-challenge casual unverified race. Portrait preferred;landscape works.