2rqkb1r/p2pp1pp/bpn4n/2pN1p2/1PBPP3/B7/P1PK1PPP/R2Q2NR b k - 5 9
FEN state: 2rqkb1r/p2pp1pp/bpn4n/2pN1p2/1PBPP3/B7/P1PK1PPP/R2Q2NR b k - 5 9 ; Best move: a6c4
The current state of the chess board is: Black rook 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 d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black bishop at a6, black pawn at b6, black knight at c6 and black knight at h6. Black pawn at c5, white knight at d5 and black pawn at f5. White pawn at b4, white bishop at c4, white pawn at d4 and white pawn at e4. White bishop at a3. White pawn at a2, white pawn at c2, white king at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 5. Full move number is 9. Black to move.