rnq1k2r/pb1p3p/2p1pBp1/5p2/1QPP3P/4P2R/P2KNPP1/RN3B2 w q - 1 18
FEN state: rnq1k2r/pb1p3p/2p1pBp1/5p2/1QPP3P/4P2R/P2KNPP1/RN3B2 w q - 1 18 ; Best move: b4e7
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at c8, black king at e8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at d7 and black pawn at h7. Black pawn at c6, black pawn at e6, white bishop at f6 and black pawn at g6. Black pawn at f5. White queen at b4, white pawn at c4, white pawn at d4 and white pawn at h4. White pawn at e3 and white rook at h3. White pawn at a2, white king at d2, white knight at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 1. Full move number is 18. White to move.