Kurodoko

Original Kurodoko: each clue counts its own cell once and white cells along four straight rays until black blockers or edges. Clues stay white, black cells cannot share an edge and all white cells must connect. Twelve unique 5×5/7×7/9×9 challenges. Solo hints, private local 2 and exact online 2/3/4 races, genre-standard shading controls, tentative candidates, separate Check/Clear, zoom, original audio and English/PT-BR Help. Casual host-managed results unverified. Portrait preferred; landscape supported.

Arrows/WASD select immediately. Enter/left click/tap cycles unknown, black, white; Space/right click or 450ms long touch reverses. Shift+arrows confirms white. Separate Black/White/Pencil/Clear controls; Delete/Backspace clears. Ctrl/Cmd+Enter Check. Pencil/P adds tentative black/white candidates in unknown cells. Ctrl/Cmd+Z Undo, Ctrl/Cmd+Shift+Z or Ctrl+Y Redo. F1 Help; Esc closes Help first then pauses solo/local; online Help stays live. Zoom, M mute, R confirmed restart. Fixed clues remain white. Exact local 2 private handoff; online 2/3/4 eight-minute races. Portrait preferred; landscape supported.