Selection
To fit the skills of a tactician the next problem to be solved is randomly selected from a set of problems within a certain rating range.

tactician ratingproblem rating
roundedfromto
50001470
60001470
70001470
8001301470
9003301470
10005301470
11007301470
12009251475
130010901510
140012301570
150013401660
160014401760
170015151885
180015652035
190015852215
200015852415
210015852615
220015852815
230015853000
240015853000
250015853000

This restricts the amount of reachable problems to approx. 10000. You can choose a virtual rating to get problems out of that range at your profile. You'll get harder (easier) problems with more (less) time to solve, if you choose a virtual rating above (below) your current rating.