Real-time chess powered by energy: spend it to move any piece at any time.
How to play
Real-time chess: there are no turns. Both sides gain 1 energy per second (max 10) and spend it to move any piece at any time: pawn 1, king 2, knight/bishop 3, rook 4, queen 5. Each capture refills energy by the captured piece's cost + 2. A piece that just moved rests for 1.5 s (faded). No check rules, no castling or en passant; pawns auto-promote to queens. Capture the enemy king to win.