rnb1kb1r/1p1p3p/p1p2p1n/PN2p3/P3P3/2P2Np1/3PBPPP/R1BQ1RK1 b kq - 0 10
FEN state: rnb1kb1r/1p1p3p/p1p2p1n/PN2p3/P3P3/2P2Np1/3PBPPP/R1BQ1RK1 b kq - 0 10 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at d7 and black pawn at h7. Black pawn at a6, black pawn at c6, black pawn at f6 and black knight at h6. White pawn at a5, white knight at b5 and black pawn at e5. White pawn at a4 and white pawn at e4. White pawn at c3, white knight at f3 and black pawn at g3. White pawn at d2, white bishop at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white rook at f1 and white king at g1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 10. Black to move.