Renju

Original 15×15 Renju adaptation with a casual forced-center opening. Black wins exactly five; White wins five or more. Black overline, double-four and true double-three lose unless the same move wins an exact-five. True threes require recursively legal straight-four continuations; two ends of one four count once, separate fours in one direction count twice. Red preview warns before separate placement. After three stones, two successive passes draw; full board draws. No tournament opening/swap/fifth-stone procedure.

One human versus a same-rule threat-aware bot, exact local and online two humans. Native intersection board and bounded black/white stones, separate 48px controls, legal hint, zoom/panning, solo Undo, original audio, English/PT Help/rematch.

Public replay-validated online history, 60-second turn forfeit, acknowledged casual host-managed result. Departure/background/deadlines abort without result; no reconnect/migration. Portrait preferred; landscape supported.

• Initial WASD/arrows select; Initial Space/Enter/Numpad Enter places at the first press; F is an alias
• Mouse/touch: completed click/tap on a legal point places directly; invalid/forbidden points only preview
• Local Black: WASD/Space/F/H; White: arrows/Enter/Numpad Enter/Right Shift
• H plans a hint without placing; U undoes solo; Z zooms; native Place remains available
• Escape closes Help first; Escape pauses/resumes solo/local; P remains Pass; M mutes; F1 opens Help; online Help stays live
• Native focus, IME, modifiers and held keys preserve ordinary behavior; canceled contacts/lifecycle changes never place
• Portrait preferred; landscape supported; controls remain outside the board