r1b1kbr1/pp1nnpp1/3pp2p/2p5/QPP2BP1/2NP3q/P2KPP1P/R4BNR w q - 2 10
FEN state: r1b1kbr1/pp1nnpp1/3pp2p/2p5/QPP2BP1/2NP3q/P2KPP1P/R4BNR w q - 2 10 ; Best move: f1h3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at b7, black knight at d7, black knight at e7, black pawn at f7 and black pawn at g7. Black pawn at d6, black pawn at e6 and black pawn at h6. Black pawn at c5. White queen at a4, white pawn at b4, white pawn at c4, white bishop at f4 and white pawn at g4. White knight at c3, white pawn at d3 and black queen at h3. White pawn at a2, white king at d2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 10. White to move.