r1bqk3/pppp1ppr/n4n1p/2b5/P2PpP2/2B5/1PP1PNPP/RN1QKB1R w q - 4 10
FEN state: r1bqk3/pppp1ppr/n4n1p/2b5/P2PpP2/2B5/1PP1PNPP/RN1QKB1R w q - 4 10 ; Best move: d4c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black pawn at f7, black pawn at g7 and black rook at h7. Black knight at a6, black knight at f6 and black pawn at h6. Black bishop at c5. White pawn at a4, white pawn at d4, black pawn at e4 and white pawn at f4. White bishop at c3. White pawn at b2, white pawn at c2, white pawn at e2, white knight at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 10. White to move.