r1b1kb1r/pp1p2p1/5p2/4pP1p/1qP1n1n1/PP4BP/4P1P1/R3KBNR w kq - 0 20
FEN state: r1b1kb1r/pp1p2p1/5p2/4pP1p/1qP1n1n1/PP4BP/4P1P1/R3KBNR w kq - 0 20 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7 and black pawn at g7. Black pawn at f6. Black pawn at e5, white pawn at f5 and black pawn at h5. Black queen at b4, white pawn at c4, black knight at e4 and black knight at g4. White pawn at a3, white pawn at b3, white bishop at g3 and white pawn at h3. White pawn at e2 and white pawn at g2. White rook at a1, white king at e1, 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 20. White to move.