r1b1qn1r/2p1kpb1/p5pp/1p1p4/P2P1P2/1BK1nPP1/1PP1QN1P/RN5R b - - 4 18
FEN state: r1b1qn1r/2p1kpb1/p5pp/1p1p4/P2P1P2/1BK1nPP1/1PP1QN1P/RN5R b - - 4 18 ; Best move: f8e6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at e8, black knight at f8 and black rook at h8. Black pawn at c7, black king at e7, black pawn at f7 and black bishop at g7. Black pawn at a6, black pawn at g6 and black pawn at h6. Black pawn at b5 and black pawn at d5. White pawn at a4, white pawn at d4 and white pawn at f4. White bishop at b3, white king at c3, black knight at e3, white pawn at f3 and white pawn at g3. White pawn at b2, white pawn at c2, white queen at e2, white knight at f2 and white pawn at h2. White rook at a1, white knight at b1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. Black to move.