rnb1kb1r/4q1p1/p2pp2n/1p5p/P1pP1P1P/R3p3/1PPQP1PR/2B1KBN1 w - - 0 21
FEN state: rnb1kb1r/4q1p1/p2pp2n/1p5p/P1pP1P1P/R3p3/1PPQP1PR/2B1KBN1 w - - 0 21 ; Best move: a3e3
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 bishop at f8 and black rook at h8. Black queen at e7 and black pawn at g7. Black pawn at a6, black pawn at d6, black pawn at e6 and black knight at h6. Black pawn at b5 and black pawn at h5. White pawn at a4, black pawn at c4, white pawn at d4, white pawn at f4 and white pawn at h4. White rook at a3 and black pawn at e3. White pawn at b2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at g2 and white rook at h2. White bishop at c1, white king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.