Jacob Aagaard GM

Quick summary

Nice run in recent blitz: sharp attacking play, practical conversions in simplified positions, and a very healthy trend in your rating (up ~63 points over the last month). Your Modern lines are firing — you’ve been scoring very well with them. Key area to tidy is accepting or initiating speculative sacrifices in the Petroff-style game where the tactics backfired under practical conditions.

What you did well (so you can keep doing it)

• Active piece play and initiative — you consistently place pieces on useful squares and press the opponent (seen repeatedly in your wins).
• King activity and endgame technique — you convert small advantages and use the king aggressively in pawn/king endings.
• Opening preparation in the Modern — very high winrate there; your choice of plans and follow-up ideas are working in blitz. See Modern Defense.
• Practical decision-making — you simplify when it helps and convert material/positional edges rather than overcomplicating in time trouble.

Key mistakes to fix (quick wins)

• Avoid uncalculated speculative sacrifices in the opening/middlegame. In your loss you allowed a tactical sequence around f2 that left you passive and with structural/tempo problems — don’t grab complications unless you’ve checked the concrete follow-up for opponent replies. See the critical sequence in the loss:
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• Time management spikes — you often go down to very low seconds early in the game. Shift a little more time to critical opening transitions (moves ~8–18) so you don’t have to make big strategic/tactical calls on the increment alone.
• Tactical pattern recognition — the same motifs (knight forks, sacrifices to open the king, discovered checks) keep cropping up. A focused tactics regimen will reduce the number of missed refutations and bad speculative tries.

Concrete 4‑week training plan (blitz-focused)

• Daily: 20 minutes tactics (mix of 3–4 move combinations and short mates). Focus on knight forks, discovered attacks and removing the defender patterns.
• 3× per week: 30 minutes of rapid opening review — pick 2–3 critical positions from your Modern and the Petroff where you got into trouble. Run them through an engine once, then play them out from both sides in 5+1 practice games.
• Weekly: one 30–45 minute post‑mortem of your worst loss and best win that week. Find the single turning decision in each game and practice the motif that decides it (e.g., resist speculative Nxf2 sacrifices unless the tactical refutation is clear).
• Endgame: 2× per week, 15 minutes of king+pawn and rook endgame drills. Your king activity is strong — convert that into more routine wins with textbook technique (Lucena, opposition, key squares).

Practical blitz tips to apply immediately

• When low on time, trade to simplify if you are ahead in material or position — simplification is the fastest conversion tool in blitz.
• Before any tactical sacrifice ask two quick checks: “Does it win material outright?” and “What is opponent’s strongest reply?” If either is unclear, avoid the sacrifice.
• Use a 5‑10 second think on each opening move that defines the middle game plan (this prevents having to make multi‑move strategic choices with seconds left).
• Pre-moves: use them only when captures or forced recaptures won’t change the tactical landscape; otherwise they can be fatal in complications.

Notes from the specific games

• Win vs ericarecopy (Modern): you handled the open lines well and transitioned into a winning endgame. Good job using rooks and bishops actively — keep the same plan in similar structures. (Opening: Modern Defense)
• Loss vs ericarecopy (Petrov): the critical error was allowing/entering a messy tactical episode around f2 without confirming the follow-up. In plain language: don’t take the tempting pawn/square if it opens your position and lets the opponent’s pieces explode into your camp. (See Petrov's Defense for the theme.)
• Other wins: your games where you built small advantages and improved piece placement (especially bishop outposts and rook on the 7th/file) look very reliable — repeat that structure: improve pieces, provoke weaknesses, then convert.

View the tactical turning point from the loss quickly here:

Next steps — short checklist

• Run 10 tactical puzzles daily for 7 days straight (focus on motifs you missed).
• Analyze 3 recent losses with engine and identify one recurring mistake; make that your micro‑goal for the week.
• Play 10 blitz games where you deliberately practice hybrid time control: spend 5–10 extra seconds in move 8–15 to avoid late surprises.

Closing

Your rating trend and win/loss numbers show you’re doing a lot right. Small, consistent work on tactical discipline and a slight tweak to early time allocation in each blitz game should yield quick gains. If you want, I can prepare a short set of 20 tactical drills based on motifs from your loss + a quick annotated replay of the Modern game.