GM

Tiviakov, Sergei

NED NED·Born 1973·FIDE #1008013·3,649 Games

Classical25383,522 Games
Rapid2602105 Games
Blitz265322 Games

Statistics

3649

Total

1666

Wins

1538

Draws

445

Losses

46%42%12%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average
Solid conversion: 84%
Very consistent (81%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 ♔ (72% in 1858 games)

Deep Analysis

Stockfish 18 · Classical games · 367 analyzed

Accuracy by phase
Opening96.5%
Middlegame94.2%
Endgame95.7%

Clutch Factor

Performance under pressure

+6%
Winning (+2 or more)95%
115 Games
Equal position95%
176 Games
Losing (-2 or more)89%
76 Games

Problematic Pieces

Which pieces cause most errors?

♖
27%
58 errors
♙
23%
50 errors
♞
17%
37 errors
♕
13%
29 errors
♔
11%
25 errors
♗
9%
19 errors

Critical Moment

When does the first serious error occur?

Move 36average
1-15
16-25
26-35
36-45
46+
31% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

7
6
6
8
9
11
7
11
7
6
abcdefgh
Many
Few
Critical squares
e411 err
e511 err
d59 err
c58 err
c77 err
e4/e5 concentrate most errors. Force decisions in those zones.

Recent Games

W
Duijn, Richard2158

Dutch League 2025-26 · 11 Apr 2026

1-0
D
Willemze, Thomas2331

Dutch Meesterklasse 2025-... · 28 Mar 2026

½-½
W
Ten Hertog, Hugo2519

Dutch Meesterklasse 2025-... · 8 Mar 2026

1-0
W
Ten Hertog, Hugo2521

Round 8: Tiviakov, Sergei... · 7 Mar 2026

1-0
L
Van Foreest, Jorden2698

NED Ch KO 2025 · 6 Jul 2025

1-0
D
Van Foreest, Jorden2698

NED Ch KO 2025 · 6 Jul 2025

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!
White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID
White
French: Tarrasch
58.0%
243 Games·Wins

1.e4 e6 2.d4 d5 3.Nd2

Sicilian: Closed
70.3%
74 Games·Wins

1.e4 c5 2.Nc3 Nc6

Black
Sicilian: d6 Systems
53.4%
163 Games·Wins

1.e4 c5 2.Nf3 d6

Reti: Double Fianchetto
56.1%
41 Games·Wins

1.Nf3 Nf6 2.g3 b6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#27Rb1??
Tactics
vs Begmuratov
OTB·2025
▶
#30Rxd5??
Tactics
vs Marn
OTB·2024
▶
#29g3??
Tactics
vs Sokolov
OTB·2024
▶
#89Nc7??
Endgame
vs Sokolov
OTB·2024
▶
#44Re8??
Endgame
vs L'Ami
OTB·2024
▶
#28Qc2??
Tactics
vs Nikitenko
OTB·2024
▶
#49Rxg7+??
Endgame
vs Sonis
OTB·2024
▶
#40c7??
Tactics
vs Haubro
OTB·2024
▶
#56Kf3??
Endgame
vs Rasulov
OTB·2023
▶
#30f3??
Tactics
vs Suleymenov
OTB·2022
Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2026
2025
2024
2023
2022
2021
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
1869 Games
53%39%8%
1.e4
72%
1858
1.c4
71%
7
1.d4
67%
3
1.f4
50%
1
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