r1bq1knr/pp5p/2pppp2/2b1n1p1/4P1B1/3P4/PPP2PPP/RNBQKRN1 w Q - 0 10
FEN state: r1bq1knr/pp5p/2pppp2/2b1n1p1/4P1B1/3P4/PPP2PPP/RNBQKRN1 w Q - 0 10 ; Best move: g4h5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7 and black pawn at h7. Black pawn at c6, black pawn at d6, black pawn at e6 and black pawn at f6. Black bishop at c5, black knight at e5 and black pawn at g5. White pawn at e4 and white bishop at g4. White pawn at d3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1, white rook at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. White to move.