Daily puzzle from Lichess. Mate trainer works offline.
Peer-to-peer via WebRTC. No account, no server. Host plays White; the room dies when the host leaves.
Play your first move to see suggestions.
No moves yet
Tip: right-drag (or Shift+drag) to draw arrows, right-click a square for a circle. In online games you can premove by dragging while waiting for your turn.