About the 10x10 preset
This is a starting point for the custom game builder: a compact 10×10 board carrying 15 mines across 100 cells, or 15.0% density. That puts it in the same difficulty band as Intermediate (40 mines on 16×16), so what changes here is scale rather than difficulty — 85 cells to clear instead of 216.
Tips for This Size
This smaller grid size is great for quick games and practicing patterns.