r1b1k1nr/1ppp2p1/p3p3/1P2P1qp/Pb3p2/5PPB/2nP1K1P/R1B1Q1NR w q - 1 18
FEN state: r1b1k1nr/1ppp2p1/p3p3/1P2P1qp/Pb3p2/5PPB/2nP1K1P/R1B1Q1NR w q - 1 18 ; Best move: e1e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at a6 and black pawn at e6. White pawn at b5, white pawn at e5, black queen at g5 and black pawn at h5. White pawn at a4, black bishop at b4 and black pawn at f4. White pawn at f3, white pawn at g3 and white bishop at h3. Black knight at c2, white pawn at d2, white king at f2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at e1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 18. White to move.