2rq1bnr/1p1k3p/4pp2/p1pp2P1/P2P2P1/3P1NR1/4PP2/RNBQKB2 w - - 3 21
FEN state: 2rq1bnr/1p1k3p/4pp2/p1pp2P1/P2P2P1/3P1NR1/4PP2/RNBQKB2 w - - 3 21 ; Best move: d1b3
The current state of the chess board is: Black rook at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black king at d7 and black pawn at h7. Black pawn at e6 and black pawn at f6. Black pawn at a5, black pawn at c5, black pawn at d5 and white pawn at g5. White pawn at a4, white pawn at d4 and white pawn at g4. White pawn at d3, white knight at f3 and white rook at g3. White pawn at e2 and white pawn at f2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white bishop at f1. Both players have exhausted their castles. Half move number is 3. Full move number is 21. White to move.