Generally, mature chess players will stay in the same ratings range
for years. Then, occasionally and only occasionally, a player will
have a burst of rating points. This happened to me when I read Dan
Heisman's material on "Real" Chess versus "Hope" Chess. I gained
about 150 points over six months after assimilating the concept. I
am wondering if other readers can describe a similar rating points
gain and connect the gain to something new that they learned about
chess that had a comparable "impact".