CHESS SMACKDOWN

Tap a piece, then tap a highlighted square to move. Castling and en passant are available when legal — just tap the King two squares toward its Rook, or tap the diagonal square behind a pawn that just double-moved. Moving onto an enemy piece (including en passant) starts a card battle: both players' top face-up card is compared.

Attacker higher	Capture succeeds
Defender higher	Attacker's piece is destroyed
Tie, no Jokers	Nothing happens, turn consumed
Attacker wins with Joker	Capture + 1 bonus piece
Both Jokers	Armageddon — both pieces removed + 3 more each
Attacking a King	3 rounds always played. King wins the majority → attacker destroyed. Attacker wins the majority → King captured, game over. 1-1-1 → tie, nothing moves.
King attacks & loses	King captured — game over

This build follows 03-card-battle.md and related rulebook files, with a few simplifications for a clean two-player build:

• Castling and en passant follow standard chess rules; since this variant has no check, castling only requires that the King and Rook haven't moved and the squares between are empty.
• En passant captures go through the full card battle, same as any other capture.
• Pawns reaching the last rank let you choose Queen, Rook, Bishop, or Knight.
• The 3 face-down cards are cosmetic; only the real face-up card (drawn from your deck) decides the round.
• A King battle plays up to 3 rounds — no sudden death, no replaying ties. If either side wins the first 2 rounds, that's already the majority, so the 3rd round is skipped. Majority of round wins decides it; a 1-1-1 split is a tie and both pieces stay put.
• Sniper/Armageddon sub-effects don't trigger on individual rounds inside a King battle — only the overall 3-round result matters.
• A King is never removed by Armageddon — only the King-battle rule can capture a King.
• If a side has fewer than 3 non-King pieces left when Armageddon triggers, that side just loses whatever it has \u2014 Armageddon itself is never canceled, and a King can end up standing alone.