Puzzle Rush!

Recently I have discovered the new chess training tool here called "Puzzle Rush".

My first impression is that it seems like an invaluable tool to hammer in core chess principles, like:

• When you see a check, always give a check
• Sac first, think later
• Calculation is a waste of valuable time
• You see a free queen, do not take it but look for a crazy sacrifice sequence for a checkmate
• When you see a forced mate, also look for a crazy sacrifice sequence for a quicker checkmate
• Material gain is always worth any positional concession, including the safety of your king
• Always push a passed pawn
• When promoting a pawn, consider which piece you want to promote to
• Always en passant

Once all of the above are a part of your chess muscle memory, you might get far enough to find  puzzles to practice more advanced principles.

But what do I know? Judging from my puzzle rush scores, I have not mastered the elementary ones above ...