Scouting report: Koustav Chatterjee (GM, IND)

570 over-the-board games in the Chess Stalker database (561 classical, 9 blitz): 45% wins, 34% draws, 21% losses. FIDE rating 2481 standard, 2396 rapid, 2431 blitz. 346 games analyzed with Stockfish: 93% accuracy, 0.07 blunders per game.

  • Opening repertoire of Koustav Chatterjee as White and Black, with results per line — free.
  • Weaknesses and blunder patterns, evaluated with Stockfish — free.
  • Recent over-the-board games and endgame statistics.
  • Twin Bot: a sparring bot that imitates Koustav Chatterjee's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/25073060 — no account needed.

Chess Stalker

Koustav Chatterjee

GM

Indiaborn 2003FIDE ID 25073060

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2350
2450
2550
2546 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2481
2431
2396
2548peak, May 2023
570games
258wins, 45%
193draws, 34%
117losses, 21%

Play style

before facing them
Elite accuracy: 93.3% average
Solid conversion: 85%
Very consistent (84%)
Very precise: only 0.1 blunders/game
Dominates 1.Nf3 as ♔ (72% in 78 games)

Play against Koustav Chatterjee's Twin

Their real openings, level & style

Based on 570 games

Openings

570 games

Weaknesses

where they slip as ♔ White

No significant weaknesses detected as white

Strengths

what holds up for them as ♔ White
Nimzo-Indian: Rubinstein1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e316 games, last played last month56.3%wins

Deep analysis

Stockfish · Classical · 346 analyzed
Accuracy by phase
Opening
96.8%
Middlegame
94.0%
Endgame
95.7%
Clutch factor
+4%
Winning (+2)
94%
Equal
94%
Losing (−2)
90%
Problematic pieces
23%
59 err
21%
54 err
21%
54 err
14%
35 err
12%
31 err
9%
22 err
Critical moment
Move 46 avg
0%
1-15
26%
16-25
26%
26-35
26%
36-45
21%
46+
26% of blunders occur after move 16-25. Keep tension until then.
Error heatmap · Critical squares
11
12
Few
Many
e4
12
f6
11
b3
9
a4
8
e6
8
e4/f6 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#30
f4?? vs Atwell
Middlegame · OTB · 2026
#17
♛e7?? vs Ehsan Ghaemmaghami
Middlegame · OTB · 2025
#28
♝a4?? vs Zhou
Middlegame · OTB · 2025
#15
♞e4?? vs Hong
Middlegame · OTB · 2025
#25
♜d8?? vs Ozenir
Middlegame · OTB · 2025
#112
♜h4+?? vs Budisavljevic
Endgame · OTB · 2025

Recent games

Sheehan, Ethan(2397)

CCCSA Labor Day GM-B 2026 · 7 Sept 2026

0–1
Sethuraman, Sandeep(2455)

CCCSA Labor Day GM-B 2026 · 7 Sept 2026

½–½
Altman, Joshua(2248)

CCCSA Labor Day GM-B 2026 · 6 Sept 2026

1–0
Jiang, Andrew(2276)

CCCSA Labor Day GM-B 2026 · 6 Sept 2026

½–½
Schitco, Ivan(2482)

CCCSA Labor Day GM-B 2026 · 5 Sept 2026

½–½
Amburgy, Ryan(2288)

CCCSA Labor Day GM-B 2026 · 5 Sept 2026

½–½

Endgame statistics

Repertoire

PRO
570 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
280 games49%W34%D17%L
Move
1. d4
1402w
48%31%21
64%
1. ♞f3
782w
58%29%13
72%
1. c4
332y
39%39%22
59%
1. e4
272w
44%48%
69%
1. g3
112y
100%
50%
1. b3
18y
100%
50%

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