r1b1k1r1/1p4pp/p1p1N3/q1np1P2/QbP1BP1P/1P6/P2PK1PR/RNB5 w - - 1 21
FEN state: r1b1k1r1/1p4pp/p1p1N3/q1np1P2/QbP1BP1P/1P6/P2PK1PR/RNB5 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 e8 and black rook at g8. Black pawn at b7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at c6 and white knight at e6. Black queen at a5, black knight at c5, black pawn at d5 and white pawn at f5. White queen at a4, black bishop at b4, white pawn at c4, white bishop at e4, white pawn at f4 and white pawn at h4. White pawn at b3. White pawn at a2, white pawn at d2, white king at e2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1 and white bishop at c1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.