Here's my personal record:
(-10.96) BLUNDER - Don't punish yourself too badly, but you were winning, and now you are losing. You should have played 49. Kf3
The joy of blunders! Post them here.
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Mine couldn't be published here, as this is a family site... Who knew the computer analysis program could have such a dirty mouth! 
(-500.51) Go play checkers instead
Hhaha,personal record must be going from +3 too impressively minus 6. However the position was quite complicated and I took a lot of risk and failed to follow up.
Why not. Happened to me over a year ago. I still keep telling myself it was a mouse slip. Black to screw up in one.
hahaha, that move would take me some time to find hahah
Feb 14, 2015
0
#8
I figured out that blunder in 5 seconds. You see, I have a gift for blundering...
Feb 15, 2015
0
#9
I've outdone myself. I just lost a game on a one move checkmate I didn't see. The guy who beat me was rated 450 points beneath me and goes by colthejock.
Parcheesi. Time to take up Parcheesi...
I hear playing horseshoes is fun...
hapless_fool wrote:
I've outdone myself. I just lost a game on a one move checkmate I didn't see. The guy who beat me was rated 450 points beneath me and goes by colthejock.
Parcheesi. Time to take up Parcheesi...
It's O.K. to blunder when we are under time pressure...Oh, wait a moment. It was an online game?
...
casper_van_eersel wrote:
Why not. Happened to me over a year ago. I still keep telling myself it was a mouse slip. Black to screw up in one.
Saw the solution instantly. I didn't even read the "black to screw up in one" part -- I just saw the material and knew.
Bubbling wombat bombs calling fresh dog pinapples with ninja bananas!
Now that I have your attention, My 'best' was +4 to -5 (DO NOT ASK ME WHAT I WAS THINKING)
Feb 19, 2015
0
#14
HilarioFJunior wrote:
hapless_fool wrote:
I've outdone myself. I just lost a game on a one move checkmate I didn't see. The guy who beat me was rated 450 points beneath me and goes by colthejock.
Parcheesi. Time to take up Parcheesi...
It's O.K. to blunder when we are under time pressure...Oh, wait a moment. It was an online game?
...
Well, um, I only had three hours to go you see...
Mar 4, 2015
0
#15
(+Mat01) FORCED_MATE - Bad news! Things were even and then suddenly you're faced with checkmate. You could have kept it even with 24... Bd7
I played this game the last week, it was the worst blunder i ever had in a slow game. I could never lose this game, but i blundered as a fish.
Before about a year I was going to win by a railroad mate but I started the execution by moving a wrong piece, going from a clear win to a clear defeat. The position looked like this, I don't remember it completely. We both had some more pawns on the board but it didn't have any effect on ther result. I wasn't under a time pressure. Stockfish shows going from M3 for me to about 100 for my opponent but I didn't submit the game for a computer analysis so I don't know what blunder notice would appear.
I didn't submit the game for the analysis but I doubt it would be nice to me.
As I have a diamond membership I can run computer analysis of all my games. My slow chess games are pretty much all the same. I start strong, usually do well in the opening, and at a critical juncture make some idiotic move.
Here is my latest:
(-7.38) BLUNDER - Oops! That was a serious blunder. From equal to losing in a flash. Best was 24. Rd2
The game was dead even until that move. One move and I dropped 7.38 computer points. Now that's impressive.
These happen usually when I just have too many games to play, and/or play late at night.
Anyone else have cool blunder notices? I got lots.