rnb1k3/2ppn3/1p2p1rb/p3P1pp/2P1Np2/NP1B2P1/P1QP2R1/R1B1K3 w q - 2 18
FEN state: rnb1k3/2ppn3/1p2p1rb/p3P1pp/2P1Np2/NP1B2P1/P1QP2R1/R1B1K3 w q - 2 18 ; Best move: e4d6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at c7, black pawn at d7 and black knight at e7. Black pawn at b6, black pawn at e6, black rook at g6 and black bishop at h6. Black pawn at a5, white pawn at e5, black pawn at g5 and black pawn at h5. White pawn at c4, white knight at e4 and black pawn at f4. White knight at a3, white pawn at b3, white bishop at d3 and white pawn at g3. White pawn at a2, white queen at c2, white pawn at d2 and white rook at g2. White rook at a1, white bishop at c1 and white king at e1. Black queenside is the only castle move available. Half move number is 2. Full move number is 18. White to move.