I'm actually quite good at tactics. Where I fail is after the opening and I don't see any tactics to use. I'm clueless.
You are deluding yourself. You don't see any tactics because you are bad at tactics. You got this one right in your bio, then you decided to flip a full 360 just for the sake of this topic.
Let's look at your last lost game:
https://www.chess.com/game/live/137605408352?username=imtrashlol_91&move=65
Look at move 31, after white's dxe4 move. You can win a piece by playing Bb2+, but instead you just trade down to a pawn up endgame which might or might not win. Next white plays 32. Rxh6 (??), blundering away the rook, and you ignore it. A few more moves later it's you who blunders away your rook in a drawn position. With more than 25 minutes (!) on your clock. (That is abysmal time management, and that is another issue that you seem to have).
You can study endgames, and it's a good thing. But your main weakness is tactics (lack of tactics), and that is what's losing you games.


It's completely impossible that a beginner "studies positional play". A beginner wouldn't even understand the concepts used there, let alone use them in a game. Anyone who does that is just wasting time for no reason.
I kind of agree on that first point.
'positional play' is much harder to teach than other aspects of play.
Lasker talks about that in his manual of chess.
But I would say the biggest stumbling block for beginners and novices and even more advanced players - is openings.
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Now - 'tactics' and 'endgames' aren't exclusive of each other.
They're intertwined. So are 'tactics' and 'positional play' too.
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Here's a simple example of basic tactics and basic endgames being intertwined.
White to play and win.
Black just played his K from g7 to f7.
Its white's move.
Uh oh! Black had to keep his King on g7or h7 only 'to be OK'.
He could 'bounce' between g7 and h7 - but only those two squares.
White: Rh8 !!
Black is doomed. The tactic is called 'the skewer trick'.
You call that a tactic? I solved that in like 15 seconds. There are multiple ways to deal with this. Even if black decides to not to take on A7 and chooses to attack my rook I can just promote my pawn and get a queen. Then if he takes the queen on A8 I'm now winning because I just take back with the rook. The skewer was very simple to find and I'm only rated 600. Yes you are correct black is doomed.
Its a tactic.
Its called a skewer.
It illustrates that tactics and endgames aren't exclusive of each other.
And its very basic.
Do you see yet that black's King was confined to g7 and h7 and why?
How about if it was a b-pawn instead of an a-pawn?
White's King could be in many places. And he still wins.
Black's rook could be anywhere on the file of the pawn and white still wins.
Part of the study of tactics - is the study of mistakes.
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Also don't forget - you had information. You were told its a win.
15 seconds? That's a lot.
Some players far under master level would spot that in 5 seconds or less.
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There's another basic rook ending involving a pin of a rook.
And there's the Lucena position. Also involves tactics.
The Philidor's rook ending is a draw but involves tactics.
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Regarding the semantics of 'tactics' would a beginner player be familiar with such semantics?
You might find that different people assign different semantics to 'tactics'.
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Regarding the tactics puzzles - many might not realize that they can be filtered.
So for beginners - tactics puzzles with very low ratings can be selected to do.
And they can be done unrated and without a timer.
Which is probably the best way to do them.
But with this note - if the player isn't making rapid progress in figuring out the puzzle and is starting to 'crunch' - its probably better for that player to concede he doesn't get it and pick a move on principle and be willing to get it wrong and learn instead of crunching.