The seven stones program is the only one I have written in the Visual Studio C# language. Evidently, I also did some studies relating to the problem in MUMPS. Based on comments extracted from the old C# source, a mixture of approaches were used.
From the above, it seems that a MUMPS program got as far as age 119 (I have not found this program). The push to age 122 used the C# program, which ran for several hours on an Intel Pentium 166 MHz processor.
The Visual Studio generated executable will not run on my current computer (I think Visual Studio was a beta test version). However, an old screen shot records the age 122 result.
The status bar displays the maximum age in the left box, and the seven contributing weights in the middle box. Individual weights for each age are tabled in the frame on the left of this page. The minus sign indicates weights that should be placed on the same side as the grain to be weighed.
Enumerating combinations and computing all positive sums/differences for each:
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