4kbnr/2pb1qp1/3p1p2/pP3Pp1/1p1Pp3/P4N1P/2P1PKP1/RN2QB1R w - - 2 21
FEN state: 4kbnr/2pb1qp1/3p1p2/pP3Pp1/1p1Pp3/P4N1P/2P1PKP1/RN2QB1R w - - 2 21 ; Best move: a3b4
The current state of the chess board is: Black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black bishop at d7, black queen at f7 and black pawn at g7. Black pawn at d6 and black pawn at f6. Black pawn at a5, white pawn at b5, white pawn at f5 and black pawn at g5. Black pawn at b4, white pawn at d4 and black pawn at e4. White pawn at a3, white knight at f3 and white pawn at h3. White pawn at c2, white pawn at e2, white king at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. White to move.