r1b1k1nr/ppqpp1b1/2n4p/2p2pB1/3P2PP/5N2/PPPNPP2/R2QKB1R w KQkq - 5 10
FEN state: r1b1k1nr/ppqpp1b1/2n4p/2p2pB1/3P2PP/5N2/PPPNPP2/R2QKB1R w KQkq - 5 10 ; Best move: d4d5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black queen at c7, black pawn at d7, black pawn at e7 and black bishop at g7. Black knight at c6 and black pawn at h6. Black pawn at c5, black pawn at f5 and white bishop at g5. White pawn at d4, white pawn at g4 and white pawn at h4. White knight at f3. White pawn at a2, white pawn at b2, white pawn at c2, white knight at d2, white pawn at e2 and white pawn at f2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 5. Full move number is 10. White to move.