Thank you both for the great ideas.
First I tried Andy’s settings. The image solved in 165sec after I set the number of objects to 100. It seems that the computer was overwhelmed by the number of stars. I already had the index files from 4207 to 4218.
Then I downloaded the 4109 wide field index (and, while I was there, also the 4108 and 4110, you never know …) This time, the solve took 12sec, which is absolutely fantastic.
With these settings, I could use ansvr as the primary solver.
Regards,
Horia