I just suggest more points for partial answers, or completing a puzzle even if there’s a mistake. Just to even it out a bit.
They just changed it to make scoring less dependent on time.
From the most recent Developers' Update:
- Let's start by talking about tactics scoring.
Based on your feedback, we know people find it demoralizing to gain so little and lose so much, based upon getting Tactics puzzles right and wrong. Of course, the main culprit here is **TIME**. You earn less for your hard-won successes because you took “too long.”
To allow more reward for thinking carefully about the solutions to each puzzle, we have tweaked the scoring logic: Time is now less important, and the base amount you can gain (or lose!) from a given correct solution has been increased.
- Related, unrated tactics show up in history now.
https://www.chess.com/blog/News/9-7-18-dev-update
I just suggest more points for partial answers, or completing a puzzle even if there’s a mistake. Just to even it out a bit.