r1bqk1r1/p2p4/1p1bpn2/n7/1p1Pp2p/P4QPB/2P4P/R1B1K1NR b K - 0 21
FEN state: r1bqk1r1/p2p4/1p1bpn2/n7/1p1Pp2p/P4QPB/2P4P/R1B1K1NR b K - 0 21 ; Best move: e4f3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7 and black pawn at d7. Black pawn at b6, black bishop at d6, black pawn at e6 and black knight at f6. Black knight at a5. Black pawn at b4, white pawn at d4, black pawn at e4 and black pawn at h4. White pawn at a3, white queen at f3, white pawn at g3 and white bishop at h3. White pawn at c2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.