most common early bluinder?

What do you think is the most common early blunder by beginning players?

I think:

I've never seen that one.

I think it's falling for a 4.Qxf7# mate.

ive played this twice;

typos happen

Generally speaking I'd say it's getting the Queen out too early.

Yeah, have to agree with Grobe here; probably early Queen 'movement' (can't really call it development, except in rare cases). Or, perhaps, multiple and pointless minor-piece second-moves that create superficial and easily rebuked attacks. In other words, moves that actually encourage the opponent to develop.

Not a blunder in the commonly understood '??', hanging-a-piece sense, but, in many cases, just as grave.

For 'hanging-a-piece', I don't know if any is more common than the result of a knight fork, particularly on c2/c7, with the uncastled King.

Yes -- it's good that you focus on why it's a blunder.  It's a subset of the mistakes in the opening that allow your opponent to develop with tempo.

Most common early blunder? I have one that is likely to happen:

Common opening blunders? Well, here is one that has happened to me more than once:

  Another opening mistake is in the following game. I think the move ... f6 seems fairly logical to a beginner, and so would happen quite often. I have only encountered it once in a game, though.

Moving the f pawn early in the game is a move alot of begginers do because in some cases it is not so easy to see why it lost them the game.

Classic Damiano. Not a good defense.

As for the post above that, I'm not sure too many people beginners play the Latvian. ;)

Falling for scholers mate at f7 is probably the worst one you can do. 

When I first started I used to get my queen out as early as I could.  e4, e5 Qh5 was my favourite opening moves.  A common error most people starting can make is moving the pawn to g6, (which can then set up a check and then the rook in the corner can be took.) 

Since first starting to play I have learnt its best to develop pieces and towards the centre of the board.  Rooks work better in pairs, knights and bishops are better in the centre, bishops are better near the end of the game, but knights are better at the start (mainly because they can jump over other pieces,) and its good to castle as you can get your rook in the centre, and the king in the corner. 

Do I believe learning this (and then putting it into practice made a difference) yes, I think so, although I still lose games against good players! 

I think the most common early "blunder" for beginners is not understanding the consequences of losing a pawn in a trade. I know that as a beginner, my attitude was generally "Who cares, it's just a pawn" when making minor piece trades. I would often "sacrifice" pawns to force trades. Of course, there was no compensation, and I didn't conceive of it as a pawn sacrifice. Suddenly I'd take a look at the board and he or she would have 6 pawns to my 3 and I couldn't figure out why.

I'll vote for allowing scholars mate. This is probably more common than many other suggestions because it's a passive mistake. You don't have to do anything in particular to fall for this.

Second, I think, is Damiano's defense as shown by Bjarkoff (congratulations to rich for posting the exact same thing two posts later). I think this is common because so many people learn to start out 1. e4 e5 and after 2. Nf3 there are just a few ways to protect the e5 pawn directly. Most beginners, if they lose with 2. ... Nc6 or 2. ... d6 will switch to something else and eventually try 2. ... f6. After 3. Nxe5 they are just happy to be playing someone worse than they are and snatch the knight.

There should be some kind of prize for Kupov's post. Maybe chess.com can come up with an appropriate trophy we can give him.

Well it iiiis. >.>

How about "The Redundant Redundancy Trophy in Recognition of Repetition"?

That's a blunder?  Bad mistake, yes, not a blunder...