1nbq1rk1/2pp1pb1/r7/1P2p2p/PpQn2pP/B5PB/R6R/1N2K1N1 b - - 1 18
FEN state: 1nbq1rk1/2pp1pb1/r7/1P2p2p/PpQn2pP/B5PB/R6R/1N2K1N1 b - - 1 18 ; Best move: b4a3
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black rook at f8 and black king at g8. Black pawn at c7, black pawn at d7, black pawn at f7 and black bishop at g7. Black rook at a6. White pawn at b5, black pawn at e5 and black pawn at h5. White pawn at a4, black pawn at b4, white queen at c4, black knight at d4, black pawn at g4 and white pawn at h4. White bishop at a3, white pawn at g3 and white bishop at h3. White rook at a2 and white rook at h2. White knight at b1, white king at e1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 18. Black to move.