Mestel, A Jonathan

ENG ENG·Born 1957·FIDE #400122

2417Classical

—Rapid

—Blitz

Statistics

Total1,140

Wins490

Draws357

Losses293

43%31%26%

Play Style

before facing themWhat you need to know before facing them

Elite accuracy: 92.4% average

Plays 3.0% better with white

Low resilience (31%): Doesn't save lost positions

Very consistent (91%)

Very precise: only 0.0 blunders/game

Dominates 1.g3 as

(69% in 16 games)

Play against Mestel's Twin

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

1,140 games analyzed

Deep Analysis

Stockfish 18 · Classical · 54 analyzedStockfish 18 · Classical games · 54 analyzed

Accuracy by phase

Opening

95.6%

Middlegame

92.9%

Endgame

95.9%

Clutch Factor

+5%

Winning (+2)Winning (+2)

95%16g

EqualEqual position

93%17g

Losing (−2)Losing (−2)

90%21g

Accuracy under pressure

Problematic Pieces — which cause most errors?

24%

19 err

19%

15 err

19%

15 err

16%

13 err

13%

10 err

7 err

Critical Moment

Move 33 avg

1-15

67%

16-25

26-35

36-45

33%

46+

67% of blunders occur after move 16-25 — keep tension until then.of blunders occur after move 16-25 — keep tension until then.

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

Hotspot zone

g6 / d4

Critical squares

6 err

4 err

g6/d4 concentrate most errors. Force decisions in those zones.

Openings

1,140 gamesBased on 1,140 player games

Weaknesses

— exploit these— exploit these lines

aswhite45.5%losses

Sicilian: Classical — 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6

11 games · last played 18 years agoPlay this line

asblack66.7%losses

Benoni — 1.d4 Nf6 2.c4 c5

9 games · low samplePlay this line

asblack60.0%losses

King's Indian: Main Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O

10 games · last played last yearPlay this line

Strengths

— avoid these— avoid these lines

aswhite69.2%wins

Pirc Defense — 1.e4 d6 2.d4 Nf613 g13 games · last played last year

asblack48.9%wins

Sicilian: d6 Systems — 1.e4 c5 2.Nf3 d6141 g141 games · last played 3 months ago

Critical Blunders

10 errors · Stockfish

#34Qxf6??Tacticsvs PeinOTB · 2025

#28Qe7??Tacticsvs LarkinOTB · 2024

#37Bc3??Tacticsvs CummingOTB · 2022

#23Qd7??Tacticsvs SmyslovOTB · 1973

#48Rf8??Endgamevs KorchnoiOTB

#20Nd4??Tacticsvs KorchnoiOTB

#30hxg6??Tacticsvs KorchnoiOTB

#29Bd4??Tacticsvs LarsenOTB

#35Nf5+??Tacticsvs PolgarRapid

#23Qd7??Tacticsvs SmyslovOTB

Recent Games

1,140 games

Draw

Arnason, Jon L(2407)

World Senior Teams +65 · 28 Apr 2026

½-½

Draw

Kyas, Juergen(2137)

World Senior Teams +65 · 27 Apr 2026

½-½

Draw

Nevanlinna, Risto(2189)

World Senior Teams +65 · 26 Apr 2026

½-½

Draw

Kalinitschew, Sergey(2374)

World Senior Teams +65 · 25 Apr 2026

½-½

Draw

Kiefer, Gerhard(2195)

World Senior Teams +65 · 22 Apr 2026

½-½

Win

Gazik, Igor(2224)

World Senior Teams +65 · 21 Apr 2026

0-1

Endgame Statistics

PRO25 endgames (45.5%) · avoid Rook+Bishop vs Rook+Knight (17%)

Strongest

79.4%

R+Bishop vs R+Knight

Weakest

60.6%

Pure Pawn

Reaches Endgame

45.5%

25 / 55

B vs N Pref

52.4%·47.8%

prefers the bishop

PiecesTypeWin %games

Rook + Equal Minors

77.9%353

R+Bishop vs R+Knight

79.4%306

Rook vs Minor (Exchange)

73.7%281

Rook vs Rook

72.6%252

Rook vs Two Minors

78.1%160

Pure Pawn

60.6%109

Rook + Equal Minors77.9%353

R+Bishop vs R+Knight79.4%306

Rook vs Minor (Exchange)73.7%281

Rook vs Rook72.6%252

Rook vs Two Minors78.1%160

Pure Pawn60.6%109

Weak in Rook+Bishop vs Rook+Knight: only 17% win rate (6 games) — Force thisShow all 14 types

Unlock Endgame Statistics

14 endgame categories — discover where they collapse under pressure

Repertoire

PRO

Move arrowsmost-played moves

Starting Position

SF18

562 games

46%34%20%

Move	games	%
1.e4	386	62%
1.c4	112	67%
1.Nf3	29	62%
1.d4	18	56%
1.g3	16	69%
1.Nc3	1	50%

MovegamesPerf%

1.e4

386

62%

1.c4

112

67%

1.Nf3

62%

1.d4

56%

1.g3

69%

1.Nc3

50%