r1bqkb2/2p1ppp1/3p3r/pp4Bp/P2n4/2N2NPP/2nPPPB1/R2Q1K1R w q - 0 15
FEN state: r1bqkb2/2p1ppp1/3p3r/pp4Bp/P2n4/2N2NPP/2nPPPB1/R2Q1K1R w q - 0 15 ; Best move: f3d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at c7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at d6 and black rook at h6. Black pawn at a5, black pawn at b5, white bishop at g5 and black pawn at h5. White pawn at a4 and black knight at d4. White knight at c3, white knight at f3, white pawn at g3 and white pawn at h3. Black knight at c2, white pawn at d2, white pawn at e2, white pawn at f2 and white bishop at g2. White rook at a1, white queen at d1, white king at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 15. White to move.