r1bq1bnr/1p1p1k1p/n3pp2/p1p5/PPP2P2/4P1pN/1BQP4/RN2KB1R b KQ - 0 13
FEN state: r1bq1bnr/1p1p1k1p/n3pp2/p1p5/PPP2P2/4P1pN/1BQP4/RN2KB1R b KQ - 0 13 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at d7, black king at f7 and black pawn at h7. Black knight at a6, black pawn at e6 and black pawn at f6. Black pawn at a5 and black pawn at c5. White pawn at a4, white pawn at b4, white pawn at c4 and white pawn at f4. White pawn at e3, black pawn at g3 and white knight at h3. White bishop at b2, white queen at c2 and white pawn at d2. White rook at a1, white knight at b1, 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 0. Full move number is 13. Black to move.