Lesson
The MDF Math Behind Donk-Leading the River
River Value Betting · advanced · 7 min
Tyler explains when an out-of-position river lead can outperform checking by comparing how often an opponent will call a bet versus bet when checked to. The lesson focuses on river sizing with marginal value hands, why one-third pot leads exist in theory, and why this specific hand likely called for a larger lead or a check-raise plan.
Key takeaways
- Lead the river when the expected value of betting is higher than checking, especially if the opponent will call more often than they will bet when checked to.
- A small out-of-position river bet is mainly justified when you have a marginally strong value hand that performs better as a thin value bet than as a check-call.
- Do not default to one-third pot just because you want to get called; consider whether weaker hands will also call larger sizings such as two-thirds or three-quarters pot.
- When an opponent uses a pot-sized flop bet, discount medium pairs like queens through eights and consider that they may be heavily weighted toward top pair or better.
- Against a range that likely contains many kings, consider a large river check-raise because hands like K-T through A-K may pay off.