J
GM

Jenni, Florian

SUI SUI·Born 1980·FIDE #1304232·1,313 Games

Classical24631,236 Games
Rapid243611 Games
Blitz240766 Games

Play against Jenni, Florian's Twin

PRO

Uses their openings, level & style

Statistics

Total

1313

Wins

528

Draws

410

Losses

375
40%31%29%

Play Style

What you need to know before facing them
Elite accuracy: 93.2% average
Very consistent (91%)
Very precise: only 0.0 blunders/game
Dominates 1.Nf3 ♔ (61% in 36 games)
Vulnerable to 1.Nf3 ♚ (only 48%)

Deep Analysis

Stockfish 18 · Classical games · 35 analyzed
Accuracy by phase
Opening
96.3%
Middlegame
93.2%
Endgame
94.7%
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%6g
Equal position
95%18g
Losing (-2 or more)
90%11g
Performance under pressure
Problematic Pieces — Which pieces cause most errors?
34%
12 errors
29%
10 errors
14%
5 errors
9%
3 errors
9%
3 errors
6%
2 errors
Critical Moment — When does the first serious error occur?
Move 27 average
0%
0%
100%
0%
0%
1-15
16-25
26-35
36-45
46+
100% of blunders occur between move 26-35. Keep tension until that moment.
Error Heatmap — Where do most errors occur?
3
Few
Many
Critical squares
h6
3 err
d3
2 err
d7
2 err
e4
2 err
f4
2 err
h6/d3 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines
White40.7%Loses
French: Classical — 1.e4 e6 2.d4 d5 3.Nc3 Nf6
27 Games · last played 11 months agoPlay this line
Black53.8%Loses
Catalan — 1.d4 Nf6 2.c4 e6 3.g3
13 Games · last played 5 years agoPlay this line
Black53.8%Loses
Reti: Double Fianchetto — 1.Nf3 Nf6 2.g3 d5
13 Games · last played 2 months agoPlay this line

Strengths

— avoid these lines
White61.9%Wins
Sicilian: Rossolimo — 1.e4 c5 2.Nf3 Nc6 3.Bb521 Games · last played 5 years ago
Black50.0%Wins
Italian: Two Knights — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf620 Games · last played last year
Black50.0%Wins
Scotch: Mieses — 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc620 Games

Critical Blunders

9 errors · Stockfish
Rxd7+??vs GeorgiadisOTB · 2025
Rxd7+??vs GeorgiadisOTB · 2025
Nc7??vs BurriOTB · 2025
Bxe5??vs SchweizerBlitz · 2023
Re4??vs BaenzigerBlitz · 2023
Qd3??vs CaruanaOTB · 2009
Bxf7??vs KorchnoiOTB · 2001
a3??vs KramnikOTB · 1999
Rf3??vs KorchnoiOTB · 1998

Recent Games

W
Ustianovich, Nazar(2314)

TCh-SUI 2026 · 21 Jun 2026

0-1
L
Martins, David Pires Tavares(2432)

TCh-SUI 2026 · 20 Jun 2026

0-1
W
Mattenberger, Matthias(2293)

TCh-SUI 2026 · 31 May 2026

1-0
D
Zeller, Frank(2316)

TCh-SUI 2026 · 19 Apr 2026

½-½
D
Gautier, Anand(2267)

Swiss National League A 2... · 17 Mar 2026

½-½
D
Gautier, Anand(2255)

TCh-SUI 2026 · 15 Mar 2026

½-½

Endgame Statistics

PRO20 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
Stockfish
644 Games
45%31%24%
MoveGamesPerformance%
1.e4
580
61%
1.Nf3
36
61%
1.d4
23
59%
1.g3Strong
2
75%
1.b3Strong
2
75%
1.c4
1
50%

🍪 Cookies · Chess Stalker uses technical cookies (required for operation) and analytical cookies (to improve the service). Analytical cookies are optional.