JG27Pyth> Clean up the "master database" -- Or at least just rename it, Big Database, something less misleading.
I've also suggested this. Sometimes people erroneously refer to "master games"--and in at least one case the players were unrated 8-year-olds. 
I started a thread on this as well!
yes! we are actually working on this right now. we hope to have a better database in a few weeks along with some updates and fixes to the explorer :)
This is a repost to the correct forum:
Hey, Chess.com is so generally excellent that I hate to complain, truly... but you're always looking for ways to make it better, right? --so here's one: Clean up the "master database" -- Or at least just rename it, Big Database, something less misleading. (Didn't some philosopher-sage somewhere suggest that one of the steps on the path to virtue was to call things by their right name -- or was it Yoda? can't recall...*ah, I remember, it's comes up at the end of Into the Wild -- The beginning of Wisdom is to call things by their right names... and Alexander Supertramp goes back to being Chris McCandless.)
At any rate... the "Master Database" has some pretty awful games in it and it slows down the search for interesting opening moves, among other things.
Here's an example: I was looking over some italian game/ two N's defense lines when i spotted two games winning with 5...Bc5. Was this a defense I needed to prepare for? 5...Bc5 had been played twice and both games ended in black victories. ... Well, turns out 5...Bc5 isn't even dubious, it's an outright blunder.
One game is an under 7 tournament game in which after Black's blunder, White plays passively and weakly -- I guess he was waiting for Black to throw more pieces at him-- and Black rallies to find a rather impressive (for a 6 year old!) bit of coordinated kingside attack to win.
The other is an lousy under 10 ten game that doesn't belong in anyone's database. It's just a low quality game.