Test 1

In this hand, you made a couple of decisions that could have been improved to extract more value and reduce risk.

Firstly, when you had Jack of Diamonds and Ten of Diamonds pre-flop, calling a bet of 10 after the initial 5 was reasonable. However, instead of flat betting 10, consider a larger raise (around 25-30) to apply more pressure and build the pot, especially in a heads-up scenario.

On the flop, you continued with 20 after the initial 10 bet from your opponent, which is fine; however, a better sizing could have been around 30-40. This allows for more value extraction and narrows their range of possible hands more effectively.

When the turn brought the Nine of Clubs, checking with a marginal hand could lead to missed opportunities. A bet of around 30-40 could have set up a better river response, either folding or another check-raise from your opponent.

On the river, with the Ten of Clubs giving you a pair, your call of 30 was solid, but betting instead might have induced a call from worse hands, especially since your opponent had a similar strength hand. A bet of 40-50 could help exploit the situation better.

Besides bet sizing, pay attention to your opponent's tendencies, and consider the board texture when evaluating the strength of your hand. Overall, focus on maximizing value with solid hands while maintaining aggressive pressure when appropriate.