r1b4r/np2kn1p/3bpp2/p1pNP1P1/3N4/Pq4P1/1PQP1P2/R1B1KB1R b KQ - 2 20
FEN state: r1b4r/np2kn1p/3bpp2/p1pNP1P1/3N4/Pq4P1/1PQP1P2/R1B1KB1R b KQ - 2 20 ; Best move: b3d5
The current state of the chess board is: Black rook at a8, black bishop at c8 and black rook at h8. Black knight at a7, black pawn at b7, black king at e7, black knight at f7 and black pawn at h7. Black bishop at d6, black pawn at e6 and black pawn at f6. Black pawn at a5, black pawn at c5, white knight at d5, white pawn at e5 and white pawn at g5. White knight at d4. White pawn at a3, black queen at b3 and white pawn at g3. White pawn at b2, white queen at c2, white pawn at d2 and white pawn at f2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 2. Full move number is 20. Black to move.