rnb2k1r/pp1ppp2/2p3pb/1N1n3p/2BN3P/1P2P2R/P1PP1PP1/R1BQK3 w Q - 3 10
FEN state: rnb2k1r/pp1ppp2/2p3pb/1N1n3p/2BN3P/1P2P2R/P1PP1PP1/R1BQK3 w Q - 3 10 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at e7 and black pawn at f7. Black pawn at c6, black pawn at g6 and black bishop at h6. White knight at b5, black knight at d5 and black pawn at h5. White bishop at c4, white knight at d4 and white pawn at h4. White pawn at b3, white pawn at e3 and white rook at h3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1 and white king at e1. White queenside is the only castle move available. Half move number is 3. Full move number is 10. White to move.