rnb1k1nr/2pp1p1p/6pb/1q2p3/pp1PPNPP/1P3P2/P1P5/RNBQKB1R w k - 4 16
FEN state: rnb1k1nr/2pp1p1p/6pb/1q2p3/pp1PPNPP/1P3P2/P1P5/RNBQKB1R w k - 4 16 ; Best move: f1b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at g6 and black bishop at h6. Black queen at b5 and black pawn at e5. Black pawn at a4, black pawn at b4, white pawn at d4, white pawn at e4, white knight at f4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at f3. White pawn at a2 and white pawn at c2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 4. Full move number is 16. White to move.