Why do I keep blundering in chess?
Why do I keep blundering in chess? One reason: every puzzle you've solved was from your side of the board. Never once from theirs.
But in your games, plenty of the tactics are theirs: the ones you allow.
What kinds of blunder are there?

The left chart is the one puzzles train. The right one is the one they never do.
Why is a threat harder to see?
A puzzle tells you there's something to find. Your opponent won't.
How do you train to see their threats?
- 1After every move they make, ask: what does that move want?
- 2Look at their checks, captures and threats before your own.
- 3Solve some puzzles from their side: play the attack they're about to make.
The last one is what threat puzzles in Peekchess do: you play the attack your opponent is about to make, so you see it coming. How Puzzles works

