Gennadi Sosonko
GMNetherlandsborn 1943FIDE ID 1000039
Rating & statistics
FIDE rating lists · Sep 2023 – Sep 20262500
2540
2520 · Sep 2023
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2024
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2025
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Sep 2023Oct 2026
2520Classical
2527peak, Jan 2011
1,475games
411wins, 28%
840draws, 57%
224losses, 15%
Play style
before facing themWhat you need to know before facing themElite accuracy: 93.2% average
Plays 2.7% better with white
Low resilience (22%): Doesn't save lost positions
Very consistent (81%)
Very precise: only 0.1 blunders/game
Dominates 1.d4 as 
(64% in 732 games)
(64% in 732 games)Vulnerable to 1.c4 
(only 43%)
(only 43%)Play against Sosonko's Twin
Their real openings, level & style
Practice against a bot that uses their real openings and playing style
Based on 1,475 games
Openings
1,475 gamesBased on 1,475 player gamesWeaknesses
where they slip as ♔ WhiteNo significant weaknesses detected as white
Strengths
what holds up for them as ♔ WhiteModern Benoni1.d4 ♞f6 2.c4 c5 3.d5 e614 games, last played 52 years ago64.3%wins
Deep analysis
Stockfish · Classical · 101 analyzedStockfish · Classical games · 101 analyzedAccuracy by phase
Opening
97.1%
Middlegame
93.9%
Endgame
94.8%
Clutch factor
+8%Winning (+2)Winning (+2)
97%12g
EqualEqual position
95%56g
Losing (−2)Losing (−2)
88%33g
Accuracy under pressure barely drops when losing.
Problematic pieces
28%
36 err
19%
25 err
18%
23 err
12%
16 err
12%
15 err
11%
14 err
Critical moment
Move 29 avg14%
0%
71%
14%
0%
71% of blunders occur after move 26-35. Keep tension until then.of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squaresError heatmap
8
8
8
FewMany
54Errors mapped
d5 / f5Hotspot zone
d5
88 err
f5
88 err
h5
88 err
e7
55 err
g7
55 err
d5/f5 concentrate most errors. Force decisions in those zones.
d5/f5 concentrate most errors. Force decisions in those zones.
Critical blunders
10 errors · Stockfish#33
d5e6?? vs Karpov
Blitz
#29
♜e5?? vs Korchnoi
Endgame · OTB
#77
f6?? vs Larsen
Endgame · Blitz
#26
♝f1?? vs Smyslov
Middlegame · OTB
#23
e3?? vs Korchnoi
Endgame · OTB
#37
c2b3?? vs Karpov
Blitz
Recent games
1,475 gamesRee, Hans(2402)
Donner Mem Rapid · 14 Apr 2002
Langeweg, Kick(2318)
Donner Mem Rapid · 14 Apr 2002
Ligterink, Gert(2391)
Donner Mem Rapid · 14 Apr 2002
Kuijpers, Frans(2381)
Donner Mem Rapid · 14 Apr 2002
Hartoch, Robert G(2318)
Donner Mem Rapid · 14 Apr 2002
Szekely, Peter(2445)
NRW · 10 Dec 2000
Endgame statistics
55 endgames (50%) · force Rook vs Two Minors (0%)Unlock Endgame Statistics
All their endgames: discover where they collapse under pressure
Repertoire
PROTime controls · Years · Events
1,475 games in scope
8
76
5
4
3
2
1a
b
c
defghExplore the repertoireevery move played, ranked by frequency
772 games37%W54%D9%L
772games in this linewon 37%, drew 54%, lost 9%
Move
1. d4
73224y37%54%9
64%1. ♞f3
28Sept 198554%32%14
70%1. e4
6Jan 19891783%0
58%1. c4
5Jan 1991080%20%
40%1. g3
1—0100%0
50%