r1bqk2r/1p3p2/p3p1pp/P1Pp1n2/nb2P3/N5P1/2PBNP1P/R2QKB1R w KQkq - 0 13
FEN state: r1bqk2r/1p3p2/p3p1pp/P1Pp1n2/nb2P3/N5P1/2PBNP1P/R2QKB1R w KQkq - 0 13 ; Best move: d2b4
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 rook at h8. Black pawn at b7 and black pawn at f7. Black pawn at a6, black pawn at e6, black pawn at g6 and black pawn at h6. White pawn at a5, white pawn at c5, black pawn at d5 and black knight at f5. Black knight at a4, black bishop at b4 and white pawn at e4. White knight at a3 and white pawn at g3. White pawn at c2, white bishop at d2, white knight at e2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 13. White to move.