Three on the Bar
Three checkers on the bar is normally a recipe for a swift drop
Bray's Learning Curve Tags: Doubling Decision
Volatility
This is a type of position that I often see misjudged.
Races
A simple racing position.
Match Play Doubling
Match play doubling is still poorly understood.
Match Play Complexity
The most common error I see is players not adjusting their play to the score and consistently making money-game decisions.