How to Study in a Abnormal Slump

     Lately in all my tournaments i always seem to get an advantage.  When i mean always that is exactly what i mean i played the best player in Ohio and got an advantage and still lost.  So the problem is i have lost a lot of games lately that should have been won and i need to study up for the national championship, but i don't know how!  So does anyone have a suggestion for how i can study, please don't say take your time (i get in time pressure a lot).  Any reasonable answer would be appretiated.  Thanks!

Um, sleep well, eat a halepinio bagel with cream cheese for breakfast, study, train with magnus on his app dont walk away from the board even if ur opponent is thinking, (USE UR OPPOENTS TIME TO THINK)# note to self, play stockifsh, get chess pro app if u have an apple device, get stockfish or a ches engine ask robert for help, take less time in the opening stages of the game and then use your time at the middle and engames to look out for tactics, do chess mentor and tactics trainer, and PLAY TO WIN!! 

PS: is magnus carlsen and irina krush gonna be at the nationals? and do u know anyone whos going to the nationals that i know?

You played against IM Vojinovic? When??

And I recently lost a completely won position against a 1900ish player ugh.

You are losing "won" games, hard to give advice just from that. Maybe share that game you played against Ohio's best player?

it wasnt highest rated player, it was just that he played the person who won the ohio chess congress

How big of an advantage?  What part of the game, and what kind?

Having an advantage doesn't mean you'll win (unless you're rated something like 2700 lol).

Look at your losses, what was similar between them?  Did you miss tactics?  Did you start playing passive moves?  Maybe it was something as simple as time trouble!

Whatever the common factor, that's something worth focusing on when you study.  Almost impossible to offer advice without seeing the games.

ok i will post a game

don't take you time like me

Most likely because he is the best chess player in Ohio

It wasn't just him it was 7 other people.

In the game, it seemed nearly equal the whole time (and maybe I prefer black a little) until the tactic at the end when you lost.

At what point did you think you had a big advantage?

If you're talking about losing after getting a very small advantage, then that's something everyone does who's rated below 2700... and even >2700 do it now and then.

To me the biggest lesson in that game is before making a move, you should always have a response in mind for every capture and check your opponent can play, and then calculate those lines until there are no more forcing moves.  You never want moves like 21...Ba5+ and 22...axb+ to be a surprise on the board.  You always want to have looked at those possibilities and have your next moved planned.

Just from a practical standpoint, lets say after move 12.  Black can very simply improve his position by development and then from there he has a few pawn breaks to choose from and the bishop pair will mean something at that point too.

Meanwhile white has some difficulties.  His bishop is very difficult to activate and there are no pawn breaks.  My engine likes white a little, but I think all it's seeing is the space, and if you looked at a few lines you'd see the eval slowly go down to 0 and maybe even in black's favor after 10-20 moves.

At what point are you losing the advantage?

Maybe you aren't as good as you think you are

How much time did you / your opponent have left at move 21?

What made you choose 21.Ne3 over 21.Nb4?

Are you over-confident when you find yourself at an advantage? Ego takes down even the mightiest warrior...

This was a game where i didn't have a great advantage, but i put it in the computer and after Bd8 i was up 0.45 or around that.  In my other games it was either even then i got crushed or i was winning then i got a draw or a loss.