r1bq4/ppppn1p1/4p3/5k1r/1b3p1P/3PP1P1/PN1P1P1R/R3K1N1 w Q - 0 18
FEN state: r1bq4/ppppn1p1/4p3/5k1r/1b3p1P/3PP1P1/PN1P1P1R/R3K1N1 w Q - 0 18 ; Best move: g3g4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black queen at d8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black knight at e7 and black pawn at g7. Black pawn at e6. Black king at f5 and black rook at h5. Black bishop at b4, black pawn at f4 and white pawn at h4. White pawn at d3, white pawn at e3 and white pawn at g3. White pawn at a2, white knight at b2, white pawn at d2, white pawn at f2 and white rook at h2. White rook at a1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.