r2qbk1r/p3p2p/np4p1/2Pn4/2P2PpP/3PQ3/P7/RN2KBNR b KQ - 2 20
FEN state: r2qbk1r/p3p2p/np4p1/2Pn4/2P2PpP/3PQ3/P7/RN2KBNR b KQ - 2 20 ; Best move: d5e3
The current state of the chess board is: Black rook at a8, black queen at d8, black bishop at e8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at e7 and black pawn at h7. Black knight at a6, black pawn at b6 and black pawn at g6. White pawn at c5 and black knight at d5. White pawn at c4, white pawn at f4, black pawn at g4 and white pawn at h4. White pawn at d3 and white queen at e3. White pawn at a2. White rook at a1, white knight at b1, white king at e1, white bishop at f1, white knight at g1 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.