r3kbnr/p2b2pp/3p1q2/1np1p3/4P1pP/Q3KP2/PPN5/R1B2BNR w kq - 0 21
FEN state: r3kbnr/p2b2pp/3p1q2/1np1p3/4P1pP/Q3KP2/PPN5/R1B2BNR w kq - 0 21 ; Best move: a3b3
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at d7, black pawn at g7 and black pawn at h7. Black pawn at d6 and black queen at f6. Black knight at b5, black pawn at c5 and black pawn at e5. White pawn at e4, black pawn at g4 and white pawn at h4. White queen at a3, white king at e3 and white pawn at f3. White pawn at a2, white pawn at b2 and white knight at c2. White rook at a1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 21. White to move.