rn1qkb2/3bnppr/1ppp4/p3p2p/1P4P1/3PP2N/P1P1KP1P/RNBQ1B1R w q - 4 10
FEN state: rn1qkb2/3bnppr/1ppp4/p3p2p/1P4P1/3PP2N/P1P1KP1P/RNBQ1B1R w q - 4 10 ; Best move: h3g5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8 and black bishop at f8. Black bishop at d7, black knight at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at b6, black pawn at c6 and black pawn at d6. Black pawn at a5, black pawn at e5 and black pawn at h5. White pawn at b4 and white pawn at g4. White pawn at d3, white pawn at e3 and white knight at h3. White pawn at a2, white pawn at c2, white king at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, 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.