Mareco, Sandro

ARG ARG·Born 1987·FIDE #112275·2,276 Games

Classical25512,173 Games

Rapid256639 Games

Blitz254764 Games

Play against Mareco, Sandro's Twin

PRO

Uses their openings, level & style

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

Ready to play

2276 games analyzed

Statistics

Total

2276

Wins

1166

Draws

793

Losses

316

51%35%14%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

High resilience (70%): Dangerous even when losing

Solid conversion: 84%

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (75% in 253 games)

Deep Analysis

Stockfish 18 · Classical games · 482 analyzed

Accuracy by phase

Opening

96.9%

Middlegame

94.1%

Endgame

94.9%

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

+7%

Winning (+2 or more)

95%232g

Equal position

95%196g

Losing (-2 or more)

88%54g

Performance under pressure

Problematic Pieces — Which pieces cause most errors?

26%

81 errors

17%

52 errors

16%

51 errors

15%

46 errors

15%

48 errors

11%

33 errors

Critical Moment — When does the first serious error occur?

Move 39 average

35%

21%

35%

1-15

16-25

26-35

36-45

46+

35% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap — Where do most errors occur?

Few

Many

Errors mapped

103

Hotspot zone

c5 / d4

Critical squares

15 err

12 err

11 err

10 err

c5/d4 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

No significant weaknesses detected as White

Black55.6%Loses

English vs 1...e5 — 1.c4 e5 2.e3 Nf6

9 Games · Low sample · last played last yearPlay this line

Strengths

— avoid these lines

White80.0%Wins

King's Indian: Classical — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e515 Games · last played 4 years ago

White78.6%Wins

Reti vs King's Indian — 1.Nf3 Nf6 2.c4 g628 Games · last played 8 months ago

Black46.2%Wins

Sicilian: d6 Systems — 1.e4 c5 2.Nf3 d6145 Games · last played last year

Black58.3%Wins

Catalan — 1.d4 Nf6 2.c4 e6 3.g312 Games

Critical Blunders

10 errors · Stockfish

#57fxg4??Endgamevs Baules RodriguezOTB · 2026

#47Rb2??Endgamevs BenedettiBlitz · 2025

#55a2??Endgamevs SilvaBlitz · 2025

#29Qf1??Tacticsvs TariBlitz · 2025

#26f4??Tacticsvs SchnaiderOTB · 2025

#31Bd3??Tacticsvs FloresOTB · 2025

#58Rb5??Endgamevs OroOTB · 2025

#95Re5??Endgamevs OroOTB · 2025

#58Rb5??Endgamevs OroOTB · 2025

#95Re5??Endgamevs OroOTB · 2025

Recent Games

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Endgame Statistics

PRO23 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

1143 Games

56%32%12%

Move	Games	%
1.d4 Strong	498	71%
1.e4 Strong	260	73%
1.Nf3 Strong	253	76%
1.c4	129	69%
1.b3 Strong	3	100%

MoveGamesPerformance%

1.d4Strong

498

71%

1.e4Strong

260

73%

1.Nf3Strong

253

76%

1.c4

129

69%

1.b3Strong

100%