r1b2b1r/1ppk1p1p/1nq1p2n/B2p2p1/2QPP3/NP6/P1P2PPP/RN2KB1R b KQ - 1 13
FEN state: r1b2b1r/1ppk1p1p/1nq1p2n/B2p2p1/2QPP3/NP6/P1P2PPP/RN2KB1R b KQ - 1 13 ; Best move: d5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black king at d7, black pawn at f7 and black pawn at h7. Black knight at b6, black queen at c6, black pawn at e6 and black knight at h6. White bishop at a5, black pawn at d5 and black pawn at g5. White queen at c4, white pawn at d4 and white pawn at e4. White knight at a3 and white pawn at b3. White pawn at a2, white pawn at c2, white pawn at f2, white pawn at g2 and white pawn at h2. 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 1. Full move number is 13. Black to move.