r1b1k1r1/pp2p2p/n6b/q3p1p1/2p2pP1/PP1PP2N/2P2Q1P/RNB2BKR w q - 0 18
FEN state: r1b1k1r1/pp2p2p/n6b/q3p1p1/2p2pP1/PP1PP2N/2P2Q1P/RNB2BKR w q - 0 18 ; Best move: f2e2
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at b7, black pawn at e7 and black pawn at h7. Black knight at a6 and black bishop at h6. Black queen at a5, black pawn at e5 and black pawn at g5. Black pawn at c4, black pawn at f4 and white pawn at g4. White pawn at a3, white pawn at b3, white pawn at d3, white pawn at e3 and white knight at h3. White pawn at c2, white queen at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1, white king at g1 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.