Am I mistaken in believing that there is only one possible solution to each puzzle? Because after completing today's 'fiendish' and checking the web page my solved puzzle is different
465|138|927
928|476|135
731|952|468
872|564|391
593|217|684
614|893|752
286|749|513
149|385|276
357|621|849
Am I going mad ( It's only the 4th 'fiendish' I have completed!)