Chess Stalker
C
IM

Costachi, Mihnea

ROU ROU·Born 2000·FIDE #1217518·2,623 Games

Classical24592,343 Games
Rapid2381158 Games
Blitz2482164 Games

Play against Costachi, Mihnea's Twin

PRO

Uses their openings, level & style

Statistics

Total

2623

Wins

1349

Draws

581

Losses

692
51%22%26%

Play Style

What you need to know before facing them
Elite accuracy: 93.5% average
High resilience (57%): Dangerous even when losing
Solid conversion: 90%
Very consistent (92%)
Very precise: only 0.1 blunders/game
Dominates 1.c4 ♔ (79% in 19 games)

Deep Analysis

Stockfish 18 · Classical games · 196 analyzed
Accuracy by phase
Opening
96.1%
Middlegame
92.6%
Endgame
95.1%
Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?
+4%
Winning (+2 or more)
94%84g
Equal position
95%71g
Losing (-2 or more)
90%41g
Performance under pressure
Problematic Pieces — Which pieces cause most errors?
23%
47 errors
20%
40 errors
19%
39 errors
17%
34 errors
15%
30 errors
7%
14 errors
Critical Moment — When does the first serious error occur?
Move 45 average
0%
0%
27%
27%
45%
1-15
16-25
26-35
36-45
46+
45% of blunders occur between move 46+. Keep tension until that moment.
Error Heatmap — Where do most errors occur?
9
8
8
Few
Many
Critical squares
d6
9 err
b5
8 err
d4
8 err
e4
7 err
e7
7 err
d6/b5 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines
White43.4%Loses
1.Nc3 d5 2.d4 Nf6 — 1.Nc3 d5 2.d4 Nf6
53 Games · last played 11 months agoPlay this line
White43.4%Loses
London System — 1.Nc3 d5 2.d4 Nf6 3.Bf4
53 Games · last played 11 months agoPlay this line
Black60.0%Loses
1.b3 d5 2.Bb2 Nf6 — 1.b3 d5 2.Bb2 Nf6
10 Games · last played 8 months agoPlay this line

Strengths

— avoid these lines
White81.3%Wins
1.Nc3 Nf6 2.e4 e5 — 1.Nc3 Nf6 2.e4 e516 Games · last played 11 months ago
White76.9%Wins
Italian: Giuoco Piano — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc513 Games · last played 8 months ago
Black75.0%Wins
Italian: Evans Gambit — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b412 Games
Black57.0%Wins
Italian: Giuoco Piano — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5128 Games · last played 8 months ago

Critical Blunders

10 errors · Stockfish
Bd5??vs KukelkoBlitz · 2025
Rd6??vs WojtaszekBlitz · 2025
Rc8+??vs PlatBlitz · 2025
Qe7??vs Cruz de la OsaRapid · 2025
h2??vs DavidRapid · 2025
fxe4??vs NakamuraOTB · 2025
Rxh3??vs DjukicBlitz · 2024
Kf8??vs TsolakidouBlitz · 2024
Nf5??vs RadevaBlitz · 2024
Qf5??vs SirigosBlitz · 2024

Recent Games

W
Livaic, Leon(2569)

Round 7: Livaic, Leon - C... · 30 Nov 2025

0-1
W
Anton Guijarro, David(2560)

Round 10: Costachi, Mihne... · 30 Nov 2025

1-0
W
Kuipers, Dustin(2066)

Round 2: Costachi, Mihnea... · 30 Nov 2025

1-0
D
Georgiev, Kiril(2556)

Round 13: Georgiev, Kiril... · 30 Nov 2025

½-½
L
Iturrizaga Bonelli, Eduardo(2630)

Round 12: Costachi, Mihne... · 30 Nov 2025

0-1
W
Markocic, Tine(2143)

Round 3: Markocic, Tine -... · 30 Nov 2025

0-1

Endgame Statistics

PRO23 endgame categories analyzed
Endgame Statistics
Reveal weaknesses →
Repertoire
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Move arrowsmost-played moves
Starting Position
Stockfish
1320 Games
53%22%25%
MoveGamesPerformance%
1.d4
861
62%
1.e4Strong
192
73%
1.Nc3
167
61%
1.Nf3
31
68%
1.c4Strong
19
79%
1.b3Strong
12
71%
1.b4Strong
7
71%
1.a3Strong
6
75%
1.f4Strong
6
83%
1.f3Weak
5
20%
1.c3Strong
3
100%
1.a4Strong
2
100%
1.e3Strong
2
100%
1.g3Weak
2
0%
1.g4
2
50%
1.h4Strong
1
100%
1.d3Strong
1
100%
1.Nh3
1
50%

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