r1bqkb1r/p1p4p/1n1Q4/1Pn3p1/3Pp3/1P2KP2/P5PP/RN3B1R w q - 0 21
FEN state: r1bqkb1r/p1p4p/1n1Q4/1Pn3p1/3Pp3/1P2KP2/P5PP/RN3B1R w q - 0 21 ; Best move: d6d8
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at h7. Black knight at b6 and white queen at d6. White pawn at b5, black knight at c5 and black pawn at g5. White pawn at d4 and black pawn at e4. White pawn at b3, white king at e3 and white pawn at f3. White pawn at a2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.