rn1qkb2/ppp1ppp1/3p3r/1b5p/1P1P3n/P4P1P/2PKPNP1/RNBQ1B1R w q - 1 10
FEN state: rn1qkb2/ppp1ppp1/3p3r/1b5p/1P1P3n/P4P1P/2PKPNP1/RNBQ1B1R w q - 1 10 ; Best move: b1c3
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at d6 and black rook at h6. Black bishop at b5 and black pawn at h5. White pawn at b4, white pawn at d4 and black knight at h4. White pawn at a3, white pawn at f3 and white pawn at h3. White pawn at c2, white king at d2, white pawn at e2, white knight at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.