2rqkbnr/4p3/3pn3/pp2P1Np/2p5/1P1b1P2/PBPP1KPP/R2NQR2 b k - 0 21
FEN state: 2rqkbnr/4p3/3pn3/pp2P1Np/2p5/1P1b1P2/PBPP1KPP/R2NQR2 b k - 0 21 ; Best move: e6c5
The current state of the chess board is: Black rook at c8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at e7. Black pawn at d6 and black knight at e6. Black pawn at a5, black pawn at b5, white pawn at e5, white knight at g5 and black pawn at h5. Black pawn at c4. White pawn at b3, black bishop at d3 and white pawn at f3. White pawn at a2, white bishop at b2, white pawn at c2, white pawn at d2, white king at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at d1, white queen at e1 and white rook at f1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.