Hi yuberlin and Jpeg,
I must miss something, I can't get this to work.
I've got a field created in the content type. Checkbox. The field is standard, article, fieldname.
In search I create a new simple select field and set storage to custom, free, and select the tabelcell that the values in the checkbox field is stored in. But it dosn't work.
I've tried permissive matc, exact word, any - with and without separator.
No result, and I can see in my table that it has values.