r1bq1b1r/ppppk2n/n6p/5pp1/1P5P/3PB2R/P1P1PPP1/RN2KBN1 w Q - 0 10
FEN state: r1bq1b1r/ppppk2n/n6p/5pp1/1P5P/3PB2R/P1P1PPP1/RN2KBN1 w Q - 0 10 ; Best move: h4g5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black king at e7 and black knight at h7. Black knight at a6 and black pawn at h6. Black pawn at f5 and black pawn at g5. White pawn at b4 and white pawn at h4. White pawn at d3, white bishop at e3 and white rook at h3. White pawn at a2, white pawn at c2, 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 knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. White to move.