Sealed Hands Cup

An original hidden-hand knockout cup. Rock beats scissors, scissors beats paper and paper beats rock. Equal hands repeat; two decisive wins advance.

One human plays a disclosed random or adaptive bot that seals first. Local2/4/8 uses private pass-the-device handoff. Online has exact2/4/8 signed-in humans, two-person duels and independently checked salted commitments. Eliminated entrants remain in the room through the final.

Landscape recommended; portrait supported. Native responsive bracket, original synthesis, English/Portuguese help and rematch. Casual host-managed results are unverified. Departure, invalid reveal, eight draws, missed deadline or backgrounding ends safely. No stakes, entry fees or prizes. Shared-device privacy requires people to look away; browser code cannot offer absolute secrecy.

• Release 1/2/3 to choose rock/paper/scissors; release F to seal separately
• Touch/mouse: separate private hand and Seal buttons outside the bracket
• Local2/4/8: pass the covered device, press Ready, choose privately and seal
• Solo: one human, disclosed random or adaptive bot seals first
• Escape pauses solo/local; M mutes; landscape recommended, portrait supported