This app makes it possible to play chess variants on 6x6 board.
Four patterns are prepared in advance, but you can edit them. Enjoy with your original initial arrangement.

Rules:
- Pawn double-move, en-passant capture and castling are not allowed in this variant.
- What pawns promote to is depend on initial placement. If there are no queens on the board, pawns can't promote to queens.
- Stalemate is draw.
- In the same situation three times, repetition draw.
- Other rules are the same as standard chess.

Chess66 gives you:
- You can choose AI vs AI, person vs AI, person vs person
- Evaluation value display of situation
- AI has 3 levels of strength
- Review function of game situation
- Guide movement guide
- Auto save function