1rn1kb1r/pp2p1p1/n1pp3p/5P2/1P3NP1/NbP2P2/PB1P3P/R2Q1RK1 b k - 7 18
FEN state: 1rn1kb1r/pp2p1p1/n1pp3p/5P2/1P3NP1/NbP2P2/PB1P3P/R2Q1RK1 b k - 7 18 ; Best move: b3d1
The current state of the chess board is: Black rook at b8, black knight at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at e7 and black pawn at g7. Black knight at a6, black pawn at c6, black pawn at d6 and black pawn at h6. White pawn at f5. White pawn at b4, white knight at f4 and white pawn at g4. White knight at a3, black bishop at b3, white pawn at c3 and white pawn at f3. White pawn at a2, white bishop at b2, white pawn at d2 and white pawn at h2. White rook at a1, white queen at d1, white rook at f1 and white king at g1. Black kingside is the only castle move available. Half move number is 7. Full move number is 18. Black to move.