Beginner Chess (upto 1200) =
15% opening + 40% speed + 40% tactics + 2% endgame + 3% strategy.
Intermediate Chess (1200 - 1800) =
30% opening + 30% speed + 30% tactics + 5% endgame + 5% strategy.
Advanced Chess (1800 - 2400) =
30% opening + 25% speed + 25% tactics + 10% endgame + 10% strategy.
Professional Chess (2400+) =
30% opening + 15% speed + 15% tactics + 20% endgame + 20% strategy.
Note: Speed means executing moves without blunders (dropping material).
This is an interesting breakdown. Is this anecdotal or an actual statistically significant sample of games at these various levels?
openings don't matter
not hanging pieces matters
I've certainly done my fair share of hanging pieces.