Avatar of Koustav Chatterjee

Koustav Chatterjee GM

Username: KoustavChatterjee1

Location: Kolkata, India

Playing Since: 2017-08-01 (Active)

Wow Factor: ♟♟♟♟♟

Chess.com

Daily: 2173
136W / 66L / 10D
Rapid: 2415
17W / 5L / 4D
Blitz: 2917
870W / 642L / 233D
Bullet: 2726
138W / 87L / 14D

Koustav Chatterjee: The Grandmaster with a Razor-Sharp Mind and a Sense of Humor

Born to play chess and probably eat checkmate sandwiches, Koustav Chatterjee, known online as KoustavChatterjee1, has carved out a formidable niche in the world of competitive chess. Awarded the prestigious Grandmaster title by FIDE, Koustav's journey from tentative bullet games to lightning-fast blitz battles reveals a player who refuses to settle for anything less than excellence—except maybe a good coffee break during long endgames.

Early Days and Meteoric Rise

Starting modestly with a bullet rating of 1207 in August 2017, Koustav's relentless dedication saw him skyrocket to a peak bullet rating of 2817 by January 2023—no small feat when every second counts! His blitz performance is equally awe-inspiring, boasting a peak of an almost mythical 2936 rating in February 2023. Clearly, when it comes to rapid calculation and intuitive play, Koustav’s brain is like a Swiss watch—precise, intricate, and baffling to mere mortals.

The Games That Tell the Tale

Koustav's tactical prowess shines brightest in his openings customarily veiled under "Top Secret" (because every grandmaster needs some mystery). With a winning rate of over 59% in bullet and solid performances across daily, blitz, and rapid formats, opponents have no idea whether to be more intimidated or just suspicious.

One of his recent game triumphs involved a devastating checkmate using the Four Knights Game Spanish Variation. Executed so smoothly that even his opponent barely realized the game was over until the checkmate was already on the board. Ah, the beauty of chess brilliance!

Playing Style: Endgame Whisperer & Comeback Kid

Koustav's games average around 75 moves when winning, proving he’s the kind of player who enjoys savoring his victories rather than rushing to claim them. His endgame frequency is impressively high at nearly 79%, showcasing a fondness for grinding down opponents patiently. With a comeback rate exceeding 84%, he turns losing positions into lessons for his foes on how to never lose hope.

Psychological Strength

The mysteries of chess psychology are well understood by Koustav, who maintains an impressive tilt factor of just 18. Meaning? When the going gets tough, Koustav remains as cool as a cucumber in a freezer. His peak time of day for best results is surprisingly midnight—whether it’s late-night brilliance or just caffeine-fueled wizardry is up for debate.

Human Behind the Pieces

With an average win rate above 50% playing either white or black, Koustav proves versatility knocks on every door. He’s known to keep opponents on their toes, regardless of who starts the game. And let’s not forget his humor—because if you can’t laugh after brutally checkmating someone in blitz, what’s the point?

Final Thoughts

Koustav Chatterjee is not just a Grandmaster; he’s a thrilling blend of calculated precision, relentless endurance, and a wink from the chess gods. Keep an eye on this rising star—he might just be plotting his next checkmate while you’re still figuring out your next move.

“In chess, as in life, sometimes it’s checkmate before your opponent even realizes they’re in danger. But don’t worry, Koustav promises to keep the moves entertaining!”


Coach Chesswick's Profile Photo
Coach Chesswick

Quick summary

Nice run: your recent blitz shows the same strengths that pushed your rating up — active piece play, quick conversion when you win material, and reliable tactical vision. Your rating trend is positive (up ~9 last month, +14 over 3 and 6 months) and your Strength Adjusted Win Rate (~52.2%) is healthy for blitz. Keep the momentum.

What you're doing well

  • Grabbing concrete opportunities: in your win against Levy Rozman you won decisive material (capturing an enemy rook) and simplified into a winning ending instead of letting complications last — good conversion instincts.
  • Active piece play and initiative: you consistently put rooks and queen on useful files/ranks (rook lifts and centralization) rather than passive maneuvers.
  • Opening strengths: you have very good results in several sharp lines — e.g. Sicilian Defense: Alapin Variation and Alekhine Defense show high win‑rates; that means your preparation in sharp systems pays off.
  • Resilience in long games: your rating history and overall Win/Loss/Draw record (900/641/234) show you turn good positions into points instead of throwing them away constantly.

Key weaknesses to fix (from recent games)

  • Back‑rank and queen checks: in your loss to Srihari L R a sequence with ...Qb1+ / ...Be5+ became decisive. When your king is on the back rank, avoid weakening pawn moves that open flight squares for checks — keep a luft or an escape plan before pushing pawns on the third/fourth ranks.
  • Timing of pawn breaks and king safety: some pawn advances (g/h moves) opened lines against your king. Before committing those pawns, check tactical backfires (discoveries, queen checks, forks).
  • Opening lines with lower win rates: you have below‑average performance in some quiet/positional systems (for example Catalan Opening shows ~35% WinRate). Those lines often require long‑term planning and prophylaxis rather than immediate tactics.
  • Time management in critical moments: in blitz the difference between making the correct move and panicking is often 10–15 seconds. You sometimes spend a lot of time earlier and then have little for complications — keep more reserve time into the middlegame.

Concrete next‑session plan (what to practice this week)

  • Tactics (daily): 20–30 minutes of mixed tactics with emphasis on back‑rank, queen checks and discovered attacks. Drill puzzles that end with checkmates or decisive queen intrusions.
  • Endgame basics (3× week): 15–20 minutes on rook + pawn endgames and king + pawn endgames — you convert material well, strengthen the technique so you never misstep in simplified positions.
  • Opening work (2× week): shore up weak zones: study 5–10 model games in the Catalan Opening and the London System: Poisoned Pawn Variation—learn typical pawn structures and one consistent plan for each side.
  • Blitz practice with time training: play 3–5 games at 3+0 or 5+0 but force yourself to keep at least 30 seconds into move 20. Practice short preps: one line per session so you don't burn time in the opening.
  • One post‑mortem weekly: pick your most recent loss and your most recent win and annotate 15–20 key moves (where you or the opponent deviated). Focus on the turning point rather than the whole game.

Short technical pointers (bite‑size)

  • If your king is on the back rank and you plan to push a flank pawn (h/g), ask: "Does this give my opponent a check on the first rank or a route for the queen?" If yes — delay or create luft first.
  • When you're a rook up or exchange up, aim to trade pieces but keep rooks on open files — trading into a pawn endgame is fine only if you can stop passed pawns.
  • Versus unknown lines: play simple, principled moves — develop, control center, connect rooks. Avoid speculative pawn storms unless you're sure of the attack.
  • In time trouble: simplify when safe. Trading down reduces chance of tactical refutation under low time.

Opening targets and priorities

Based on your Openings Performance, prioritize shoring up the lines with lower WinRates and consolidating the ones with strong returns.

  • Fix: Catalan Opening (WinRate ~35%) — learn 4–6 model endgames/pawn structures and one typical plan for each side.
  • Improve: London System: Poisoned Pawn Variation (WinRate ~40%) — the Poisoned Pawn requires accurate defense; learn one reliable defensive setup to neutralize early tactics.
  • Keep practicing the systems you score well in (Sicilian Alapin, Alekhine, Colle variant) — they reward your tactical style.

Micro‑tasks you can do in a 30‑minute session

  • 10 minutes: tactics ladder (focus: pins, forks, back‑rank).
  • 10 minutes: play a 5+0 rapid with the explicit goal of preserving 30s at move 20 and converting a small advantage calmly.
  • 10 minutes: review a key moment from your loss vs Srihari L R — find the single move that changed the evaluation and write down why.

Example position / replay of your recent win

Review the flow where you won material and converted; replay the critical phase to internalize decision patterns.

Final note — tempo & targets

Your overall trajectory is strong (positive slope across 1/3/6/12 months). Small, focused work on the two tactical themes above (back‑rank/queen checks + time management) will likely convert a lot of your narrow losses into wins. Aim to reduce “one‑move” tactical losses; that usually yields a bigger rating bump than fancy new opening theory.

  • This week: do the micro‑tasks for 4 sessions — you’ll feel the difference in blitz within days.
  • If you want, send one annotated loss and one annotated win and I’ll give line‑by‑line notes on the exact turning points.


🆚 Opponent Insights

Recent Opponents
Levy Rozman 2W / 0L / 0D View
icecreamiscream 0W / 0L / 1D View
Srihari L R 2W / 2L / 2D View
Suresh Harsh 1W / 0L / 1D View
Srihari L 0W / 1L / 1D View
Mohamed Anees M 0W / 0L / 1D View
Sebastian Kostolansky 0W / 1L / 0D View
Roman Pyrih 1W / 0L / 0D View
Bogdan Bilovil 1W / 0L / 0D View
ragingknightnc 2W / 0L / 0D View
Most Played Opponents
phorque 24W / 0L / 0D View Games
yellowfalmingo 9W / 13L / 1D View Games
honestgirl 5W / 11L / 2D View Games
Sankalp Gupta 7W / 7L / 1D View Games
hagubaby05 8W / 6L / 0D View Games

Rating

Year Bullet Blitz Rapid Daily
2025 2726 2917 2415
2024 2726 2848 2415
2023 2720 2791 2415
2022 2685 2801
2021 2724 2776
2020 2446 2708 2483 1769
2019 2325 2717 1919
2018 2172 2499 1771
2017 1984 2373 1958
Rating by Year20172018201920202021202220232024202529171769YearRatingBulletBlitzRapidDaily

Stats by Year

Year White Black Moves
2025 14W / 5L / 5D 20W / 2L / 6D 90.1
2024 40W / 14L / 7D 43W / 16L / 9D 82.2
2023 69W / 48L / 12D 58W / 56L / 16D 90.4
2022 27W / 21L / 2D 25W / 20L / 9D 91.1
2021 28W / 10L / 5D 28W / 15L / 3D 82.2
2020 163W / 121L / 55D 159W / 135L / 46D 79.7
2019 110W / 85L / 23D 124W / 72L / 24D 80.7
2018 110W / 84L / 20D 105W / 84L / 17D 68.7
2017 57W / 14L / 2D 53W / 14L / 7D 62.2

Openings: Most Played

Blitz Opening Games Wins Losses Draws Win Rate
London System: Poisoned Pawn Variation 64 26 27 11 40.6%
Amazon Attack: Siberian Attack 52 31 15 6 59.6%
Catalan Opening 45 16 23 6 35.6%
Döry Defense 43 20 14 9 46.5%
English Opening: Agincourt Defense 41 19 14 8 46.3%
Alekhine Defense 40 24 15 1 60.0%
Colle System: Rhamphorhynchus Variation 36 21 11 4 58.3%
QGD: Ragozin 35 19 13 3 54.3%
Sicilian Defense: Alapin Variation 33 25 5 3 75.8%
Hungarian Opening: Wiedenhagen-Beta Gambit 28 12 10 6 42.9%
Rapid Opening Games Wins Losses Draws Win Rate
Alekhine Defense 4 4 0 0 100.0%
Italian Game: Scotch Gambit, Anderssen Attack 3 3 0 0 100.0%
Slav Defense 2 2 0 0 100.0%
Four Knights Game: Spanish Variation 2 1 1 0 50.0%
Blackburne Shilling Gambit 2 2 0 0 100.0%
English Opening: Agincourt Defense 2 1 0 1 50.0%
Ruy Lopez: Berlin Defense 2 0 2 0 0.0%
Queen's Indian Defense: Anti-Queen's Indian System 2 1 0 1 50.0%
Slav Defense: Alekhine Variation 1 1 0 0 100.0%
Amazon Attack 1 1 0 0 100.0%
Bullet Opening Games Wins Losses Draws Win Rate
Colle System: Rhamphorhynchus Variation 27 14 12 1 51.9%
Amar Gambit 19 15 4 0 79.0%
Alekhine Defense 19 12 5 2 63.2%
London System: Poisoned Pawn Variation 10 3 5 2 30.0%
East Indian Defense 7 5 2 0 71.4%
Amazon Attack: Siberian Attack 7 4 2 1 57.1%
Australian Defense 7 5 2 0 71.4%
French Defense: Burn Variation 6 3 3 0 50.0%
Hungarian Opening: Wiedenhagen-Beta Gambit 6 3 2 1 50.0%
Barnes Defense 5 3 1 1 60.0%
Daily Opening Games Wins Losses Draws Win Rate
Unknown 12 5 7 0 41.7%
Amazon Attack 12 10 1 1 83.3%
Amazon Attack: Siberian Attack 11 7 4 0 63.6%
QGD: Albin, 3.dxe5 9 6 3 0 66.7%
Barnes Defense 8 3 5 0 37.5%
Nimzo-Larsen Attack 7 6 0 1 85.7%
Australian Defense 6 4 2 0 66.7%
English Opening: Agincourt Defense 6 4 2 0 66.7%
Sicilian Defense: Taimanov Variation, Bastrikov Variation 6 4 1 1 66.7%
Sicilian Defense: Alapin Variation 6 1 4 1 16.7%

🔥 Streaks

Streak Longest Current
Winning 24 2
Losing 18 0
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