rn1qk1nr/pbpp1p1p/1b2p3/8/NpP1BP2/8/PP1P3P/R1BQ1K1R w kq - 1 13
FEN state: rn1qk1nr/pbpp1p1p/1b2p3/8/NpP1BP2/8/PP1P3P/R1BQ1K1R w kq - 1 13 ; Best move: e4b7
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black bishop at b6 and black pawn at e6. White knight at a4, black pawn at b4, white pawn at c4, white bishop at e4 and white pawn at f4. White pawn at a2, white pawn at b2, white pawn at d2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white king at f1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 1. Full move number is 13. White to move.