r1b1k1nr/pq1ppp1p/5b2/1N6/1nPpPpP1/7P/P4KB1/R1BQR1N1 b kq - 5 15
FEN state: r1b1k1nr/pq1ppp1p/5b2/1N6/1nPpPpP1/7P/P4KB1/R1BQR1N1 b kq - 5 15 ; Best move: b7b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at b7, black pawn at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black bishop at f6. White knight at b5. Black knight at b4, white pawn at c4, black pawn at d4, white pawn at e4, black pawn at f4 and white pawn at g4. White pawn at h3. White pawn at a2, white king at f2 and white bishop at g2. White rook at a1, white bishop at c1, white queen at d1, white rook at e1 and white knight at g1. Black kingside and black queenside castles are available. Half move number is 5. Full move number is 15. Black to move.