1r2k1nr/1bp2p1p/ppn1p2b/3p3p/Q2q1P2/2PPPNP1/PP1KN1B1/R1B4R b k - 1 18
FEN state: 1r2k1nr/1bp2p1p/ppn1p2b/3p3p/Q2q1P2/2PPPNP1/PP1KN1B1/R1B4R b k - 1 18 ; Best move: d4a4
The current state of the chess board is: Black rook at b8, black king at e8, black knight at g8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6, black knight at c6, black pawn at e6 and black bishop at h6. Black pawn at d5 and black pawn at h5. White queen at a4, black queen at d4 and white pawn at f4. White pawn at c3, white pawn at d3, white pawn at e3, white knight at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white king at d2, white knight at e2 and white bishop at g2. White rook at a1, white bishop at c1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.