r3k1nr/pbbp4/n3Nq1p/1ppPppp1/P7/1P3PBP/R1P1P1P1/1NK1QBR1 b k - 1 18
FEN state: r3k1nr/pbbp4/n3Nq1p/1ppPppp1/P7/1P3PBP/R1P1P1P1/1NK1QBR1 b k - 1 18 ; Best move: d7e6
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black bishop at c7 and black pawn at d7. Black knight at a6, white knight at e6, black queen at f6 and black pawn at h6. Black pawn at b5, black pawn at c5, white pawn at d5, black pawn at e5, black pawn at f5 and black pawn at g5. White pawn at a4. White pawn at b3, white pawn at f3, white bishop at g3 and white pawn at h3. White rook at a2, white pawn at c2, white pawn at e2 and white pawn at g2. White knight at b1, white king at c1, white queen at e1, white bishop at f1 and white rook at g1. Black kingside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.