Arranha-céus

Original Skyscrapers logic: each height appears once in every row and column; taller towers hide shorter ones when viewed from each edge. Twelve unique 4×4/5×5/6×6 puzzles, optional solo hints, private local 2 and exact online 2/3/4 same-challenge races. Numeric keyboard/keypad, multiple pencil candidates, zoom, separate Clear/Check and English/PT-BR Help. Casual host-managed online results unverified. Portrait preferred; landscape supported.

Arrows/WASD select immediately; keyboard digits 1–6 or visible number keypad fill heights. Click/tap selects; Space cycles height/blank; Delete/Backspace clears, Enter checks separately. Pencil/P toggles multiple number candidates in blank cells; right-click/450 ms touch selects pencil. Ctrl/Cmd+Z Undo; Ctrl/Cmd+Shift+Z or Ctrl+Y Redo. F1 Help; Esc closes Help then pauses solo/local; online Help stays live. Zoom, M mute, R confirmed restart. Exact local 2 private handoff; online 2/3/4 eight-minute same-challenge races. Casual unverified outcomes. Portrait preferred; landscape supported.