r1bq1bnr/1ppp1kp1/p1n4p/4Q3/1PP2p1P/B6N/P2PPPP1/RN2KBR1 w Q - 1 10
FEN state: r1bq1bnr/1ppp1kp1/p1n4p/4Q3/1PP2p1P/B6N/P2PPPP1/RN2KBR1 w Q - 1 10 ; Best move: e5d5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7, black king at f7 and black pawn at g7. Black pawn at a6, black knight at c6 and black pawn at h6. White queen at e5. White pawn at b4, white pawn at c4, black pawn at f4 and white pawn at h4. White bishop at a3 and white knight at h3. White pawn at a2, white pawn at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.