r1bqkb2/2ppp1p1/4B1r1/p4pP1/n1P1P2Q/4N2P/3P1P1R/RnB1K3 w q - 0 21
FEN state: r1bqkb2/2ppp1p1/4B1r1/p4pP1/n1P1P2Q/4N2P/3P1P1R/RnB1K3 w q - 0 21 ; Best move: e6f5
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 bishop at f8. Black pawn at c7, black pawn at d7, black pawn at e7 and black pawn at g7. White bishop at e6 and black rook at g6. Black pawn at a5, black pawn at f5 and white pawn at g5. Black knight at a4, white pawn at c4, white pawn at e4 and white queen at h4. White knight at e3 and white pawn at h3. White pawn at d2, white pawn at f2 and white rook at h2. White rook at a1, black knight at b1, white bishop at c1 and white king at e1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.