r1bk2nr/3p3p/p2p3b/1p3p2/Q1p3P1/PPnP1NP1/4PP2/1RB1KBR1 w - - 1 21
FEN state: r1bk2nr/3p3p/p2p3b/1p3p2/Q1p3P1/PPnP1NP1/4PP2/1RB1KBR1 w - - 1 21 ; Best move: a4a5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black knight at g8 and black rook at h8. Black pawn at d7 and black pawn at h7. Black pawn at a6, black pawn at d6 and black bishop at h6. Black pawn at b5 and black pawn at f5. White queen at a4, black pawn at c4 and white pawn at g4. White pawn at a3, white pawn at b3, black knight at c3, white pawn at d3, white knight at f3 and white pawn at g3. White pawn at e2 and white pawn at f2. White rook at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.