1rbq1kr1/1pp3pp/p1np1p1n/3Pp3/Nb6/P6P/1PPQPPP1/R3KBNR w - - 2 13
FEN state: 1rbq1kr1/1pp3pp/p1np1p1n/3Pp3/Nb6/P6P/1PPQPPP1/R3KBNR w - - 2 13 ; Best move: a3b4
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black king at f8 and black rook at g8. Black pawn at b7, black pawn at c7, black pawn at g7 and black pawn at h7. Black pawn at a6, black knight at c6, black pawn at d6, black pawn at f6 and black knight at h6. White pawn at d5 and black pawn at e5. White knight at a4 and black bishop at b4. White pawn at a3 and white pawn at h3. White pawn at b2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 13. White to move.