r2qkbr1/p2pp2p/b5N1/npp2pp1/P3P3/1QPP3P/1P3P2/RNnK3R w q - 0 18
FEN state: r2qkbr1/p2pp2p/b5N1/npp2pp1/P3P3/1QPP3P/1P3P2/RNnK3R w q - 0 18 ; Best move: b3g8
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at d7, black pawn at e7 and black pawn at h7. Black bishop at a6 and white knight at g6. Black knight at a5, black pawn at b5, black pawn at c5, black pawn at f5 and black pawn at g5. White pawn at a4 and white pawn at e4. White queen at b3, white pawn at c3, white pawn at d3 and white pawn at h3. White pawn at b2 and white pawn at f2. White rook at a1, white knight at b1, black knight at c1, white king at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.