Xadrez

Standard chess movement, castling, en passant, four promotion choices, king safety, checkmate and stalemate. Original bounded piece art, sound, English/PT Help, legal previews, solo Undo and cursor-following zoom.

Choose White or Black against a labeled tactical bot using the same movement rules, exactly two local humans or two signed-in online humans.

Digital draws are automatic at the third repeated position, 100 half-moves without pawn movement or capture, insufficient material or the disclosed 512-ply safety limit. Threefold/fifty-move claims are automatic here; no FIDE referee or tournament-clock certification.

Online has a public replay-validated board and sixty-second moves. Results are casual host-managed and unverified. Help stays live; departure/background aborts without result, with no reconnect/migration. Portrait preferred; landscape and native Standard/Theater/Fullscreen preserve the session.

• Arrows/WASD choose a square; Enter/Space or Select confirms the piece and destination
• Tap/click a piece, then its highlighted legal destination; completed release confirms. Native Select also confirms
• Promotion: choose Queen, Rook, Bishop or Knight before confirming the far-rank destination
• Delete/Clear cancels a preview; Backspace clears it or undoes your last solo decision and bot reply
• H previews a legal hint; Zoom follows the cursor; Tab visits controls; F1 Help; Escape closes Help or pauses solo/local
• M mutes. Portrait preferred; landscape supported. Online Help stays live.