You lost this game in six seconds on move four and won it back with two only-moves on moves twenty-one and twenty-two.
That is not a small gap between two halves of the same game. The half where you were losing is the half you played well.
4...e6 -- the bishop needed a square before anything else
Six seconds on the clock, and the position went from +0.2 to +3.0. 4.h4 in this line has one purpose, which is to play g4 and take the f5-bishop's squares away, and until that is answered nothing else on the board matters.
h5 was the move, and the line shows why it is enough: h5 Bd3 Bxd3 Qxd3 e6 Nf3 sits at +0.4. Stopping g4 costs a tempo, White offers the trade on d3 himself, and you get the same e6 you wanted a move later with the problem piece already off the board.
Worth seeing what the engine expected after 4...e6: g4 Be4 f3 Bxc2 Qxc2 c5. Even in the critical line the bishop comes off for the c2-pawn, because at least that is a pawn and a slightly loosened white queenside. In the game 6...Be7 7.fxe4 gave the bishop up for the h4-pawn instead, and 7...Bxh4+ 8.Ke2 did displace the king, but a piece for one pawn and an awkward king is not a trade that works.
Carry this: as a rule, when a move's whole point is to attack one of your pieces, settle that piece's escape square before you look at anything else. Six seconds is enough time to play a developing move and not nearly enough to check whether the developing move loses a piece.
17...Qf6 -- the queen took the square the knight needed
Thirty-eight seconds here, and the position went from +2.9 to +4.3. Small next to move four, but it is the move that made the rest of the game harder than it had to be.
Qb8 was better, and the line is the argument: Qb8 b3 Nf6 g5 Ng4 Qg1 holds at +2.8. The queen steps to the b8-h2 diagonal, and then the knight gets f6, which is the square it wants, and carries on to g4 where it forces the white queen to g1. Your last minor piece finds a job.
With the queen on f6 that square was taken, so the knight went to 18...Nh6 instead, and 20.Bxh6 gxh6 traded it off and doubled your h-pawns in the process. What 17...Qf6 allowed runs Rd1 Rxd1 Qxd1 e5 Rh5 Qd6, and the shape of it is the same: rooks come off, and you are left down a piece with no piece play.
Carry this: when you are worse and a minor piece is still at home, work out which square it needs before you decide where the queen goes. The queen has more squares than the knight does, so she is the one who should give way.
21...Qxf3+ -- the punish, taken on sight
21.Kd1 moved the king off the defence of the f3-knight and turned +4.2 into -2.9, and you took it at once. This was the only move in the position that held anything, and it keeps holding: Kc1 Rg8 Ne4 Qf4+ Kb1 Rxg4 is the engine's continuation, with the queen checking from f4 and the rook picking up g4 while the white king runs.
Then 22.Qe2 gave you a second one and you took that too. 22...Qxh1+ was again the only move that kept the win: Qe1 Qxe1+ Kxe1 Rg8 g5 Rxg5 trades the queens and leaves you a rook up with rooks and pawns on the board.
Two only-moves back to back, found immediately, in a position you had been losing since move eight. That is worth naming clearly because it is the strongest evidence in this game about how you actually play: the search works. It was working here under the worst circumstances the game offered.
Phase notes
Opening. This is the whole game. The Tal Variation is a forced sequence where the theory matters more than the understanding does, and 4...e6 is not a move you would find wrong by thinking harder at the board for another thirty seconds. It is a move you either know or do not.
The long defence. Between move 8 and move 20 the evaluation drifted from +3.0 to +5.6 and back and forth, but most of that movement was effort0506's, 12.Bxd4 in particular giving back nearly two pawns of advantage. You kept the game alive and did not accelerate the loss, which is real, but the eval curve in that stretch is mostly a record of the other player's decisions.
Profile check
This one contradicts a saved item. The note has said for four games that your openings are not the problem, and 4...e6 says otherwise. The correction is narrow rather than general: your opening understanding is fine, but this was a sharp forced line, and in sharp forced lines understanding does not substitute for knowing the moves. That is a prep problem, not a chess problem, and it is the cheapest kind to fix.
The second thing this game shows is worth putting next to the begemon game. There, at +3.0 and with fifty-two seconds, you declined a queen trade that won and let the advantage go. Here, down a piece and losing, you found two only-moves without hesitating. Same player, same week, opposite results, and the difference is which side of the evaluation you were on. When you are worse you calculate. When you are winning you choose. That is the pattern to interrupt, and it is easier to fix than a missing skill, because the skill is plainly there.
What to drill next
- The position before 4...e6, Black to move, effort0506 has just played 4.h4. Beat the engine from here three times running, then read the Tal Variation theory page so that the next time this appears you spend six seconds and get it right.
- Trapped piece puzzles. This is the motif that cost you the game: a piece with fewer squares than it looks like it has. Recognising it one move earlier is the whole fix.
- The position before 17...Qf6. Not a tactic, a placement question: find where the knight belongs, then find a queen move that does not take that square.
When a move attacks one of your pieces, name that piece's escape square out loud before you consider any other move.