2bqk1r1/2pp1np1/4rb1p/pp1N4/P1B1p2P/BP2PPP1/2PP4/R2Q1RK1 w - - 5 21
FEN state: 2bqk1r1/2pp1np1/4rb1p/pp1N4/P1B1p2P/BP2PPP1/2PP4/R2Q1RK1 w - - 5 21 ; Best move: a4b5
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at c7, black pawn at d7, black knight at f7 and black pawn at g7. Black rook at e6, black bishop at f6 and black pawn at h6. Black pawn at a5, black pawn at b5 and white knight at d5. White pawn at a4, white bishop at c4, black pawn at e4 and white pawn at h4. White bishop at a3, white pawn at b3, white pawn at e3, white pawn at f3 and white pawn at g3. White pawn at c2 and white pawn at d2. White rook at a1, white queen at d1, white rook at f1 and white king at g1. Both players have exhausted their castles. Half move number is 5. Full move number is 21. White to move.