2r1k1nr/p2b1p1p/1pp1p3/8/2P2p1q/Pn1BpP2/R1KP2P1/1NbQ3R w k - 0 21
FEN state: 2r1k1nr/p2b1p1p/1pp1p3/8/2P2p1q/Pn1BpP2/R1KP2P1/1NbQ3R w k - 0 21 ; Best move: h1h4
The current state of the chess board is: Black rook at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at d7, black pawn at f7 and black pawn at h7. Black pawn at b6, black pawn at c6 and black pawn at e6. White pawn at c4, black pawn at f4 and black queen at h4. White pawn at a3, black knight at b3, white bishop at d3, black pawn at e3 and white pawn at f3. White rook at a2, white king at c2, white pawn at d2 and white pawn at g2. White knight at b1, black bishop at c1, white queen at d1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. White to move.