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Chessco

Chessco opening atlas

See where real games begin.

Explore opening families and the routes players actually choose. Every count comes from public game history attached to an indexed Chess.com or Lichess account.

79,022,120

game records observed

78,791,695

ECO-classified

94

opening families

A game becomes a treeLive corpus
1.
82%
2.
65%
3.
49%
4.
35%
5.
24%

Your opening fingerprint

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See your win, draw, and loss record in every indexed opening family and variation. Results are always shown from the account player's point of view.

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Opening coverage

99.7% tagged

78,791,695 of 79,022,120 account-game observations reach a recognized opening within the first two moves. A game can appear once for each indexed player in it, so these are evidence records, not a claim of unique games.

Included sources

Chess.comLichess

Ranked by games

Opening families

01

Sicilian Defense

B20-B5013,576,242 games

17.2%

of classified

Most played variations

B27 3.9MOld Sicilian 2.1MModern Variations 1.6MClosed 1.1MFrench Variation 1.1MAlapin Variation 964.4KSmith-Morra Gambit 862.8KBowdler Attack 354.7KMcDonnell Attack 292.6KClosed, Traditional 281.8K
02

King's Knight Opening

C40-C448,060,284 games

10.2%

of classified

Most played variations

C40 · Latvian Gambit 4.1MNormal Variation 3.9M
03

Caro-Kann Defense

B10-B127,760,300 games

9.8%

of classified

Most played variations

B12 4.2MB10 3MAccelerated Panov Attack 225.4KHillbilly Attack 189.1KBreyer Variation 141.1KEuwe Attack 9,584Accelerated Panov Attack, Open Variation 1,026Masi Variation 971De Bruycker Defense 587Labahn Attack 429
04

French Defense

C006,729,694 games

8.5%

of classified

Most played variations

Normal Variation 2MC00 1.9MKnight Variation 1.6MQueen's Knight 497.2KLa Bourdonnais Variation 181.8KKing's Indian Attack 150.5KSteiner Variation 123KFranco-Sicilian Defense 105.7KHorwitz Attack 34.1KSteinitz Attack 33.8K
05

Scandinavian Defense

B015,070,600 games

6.4%

of classified

Most played variations

Mieses-Kotroc Variation 2.3MB01 1.9MModern Variation 713KBlackburne-Kloosterboer Gambit 141.7KZilbermints Gambit 28
06

Queen's Pawn Game

A40-D024,934,630 games

6.3%

of classified

Most played variations

Zukertort Variation 821.7KModern Defense 817.9KA40 · Zaire Defense 789.1KAccelerated London System 686.2KD00 · Amazon Attack 536.3KChigorin Variation 313.7KSymmetrical Variation 273.1KA41 · Wade Defense 250.3KChigorin Variation 118.9KLevitsky Attack 105.4K
07

Indian Defense

A45-E604,551,290 games

5.8%

of classified

Most played variations

Normal Variation 2MKnights Variation 703.9KWest Indian Defense 600.4KA45 · Canard Opening 543.8KAccelerated London System 432.4KBudapest Defense 122.9KWade-Tartakower Defense 53.3KSpielmann-Indian 35.1KTartakower Attack 21.8KOmega Gambit 17.1K
08

English Opening

A10-C202,230,922 games

2.8%

of classified

Most played variations

Agincourt Defense 251.2KAnglo-Indian Defense, Queen's Knight Variation 249.1KKing's English Variation, Reversed Sicilian 198.4KCaro-Kann Defensive System 177.3KSymmetrical Variation 150.2KSymmetrical Variation, Normal Variation 142.2KAnglo-Scandinavian Defense 136.8KKing's English Variation 130.1KA10 125.5KGreat Snake Variation 119.5K
09

Zukertort Opening

A04-A061,720,750 games

2.2%

of classified

Most played variations

Tennison Gambit 393.7KA05 212.1KSlav Invitation 160.8KSicilian Invitation 158.6KQueen's Gambit Invitation 154.2KKingside Fianchetto 130.7KPirc Invitation 102.2KA06 57.5KQueenside Fianchetto Variation 53.9KBlack Mustang Defense 48.2K
10

Pirc Defense

B001,427,549 games

1.8%

of classified

Most played variations

B00 · Borg Defense 1.4M
11

Modern Defense

B061,401,294 games

1.8%

of classified

Most played variations

B06 1.4MNorwegian Defense 11KFianchetto Gambit 169
12

Benoni Defense

A43-A561,378,662 games

1.7%

of classified

Most played variations

Old Benoni 977.4KA56 275.4KBenoni-Indian Defense 55.9KBenoni Gambit Accepted 33.9KOld Benoni 33.3KOld Benoni, Mujannah Formation 2,202Benoni Gambit, Schlenker Defense 202Cormorant Gambit 153Snail Variation 132Zilbermints-Benoni Gambit 11
13

Queen's Gambit

D061,348,465 games

1.7%

of classified

Most played variations

D06 1.3M
14

Queen's Gambit Declined

D06-D301,248,676 games

1.6%

of classified

Most played variations

D30 780.1KMarshall Defense 229.6KAlbin Countergambit 99.7KChigorin Defense 65KBaltic Defense 44.1KAustrian Defense 30KZilbermints Gambit 11
15

Nimzo-Larsen Attack

A01-A061,225,045 games

1.6%

of classified

Most played variations

A01 369.9KClassical Variation 264.4KModern Variation 251.5KIndian Variation 161.8KEnglish Variation 84.8KSymmetrical Variation 41.5KClassical Variation 39.2KDutch Variation 8,009Graz Attack 2,526Polish Variation 1,415
16

Alekhine Defense

B021,128,019 games

1.4%

of classified

Most played variations

Normal Variation 496.6KB02 428.8KScandinavian Variation 134.9KMaróczy Variation 33.1KBrooklyn Variation 14.4KMokele Mbembe 10.5KKrejcik Variation 9,696
17

Vienna Game

C25-C261,061,777 games

1.3%

of classified

Most played variations

C25 624.4KMax Lange Defense 262.7KFalkbeer Variation 145.9KAnderssen Defense 28.8K
18

Horwitz Defense

A401,041,264 games

1.3%

of classified

Most played variations

A40 · Zaire Defense 1MZilbermints Gambit 45
19

Hungarian Opening

A00-A07867,638 games

1.1%

of classified

Most played variations

A00 · Amar Opening 555.4KIndian Defense 80.4KSicilian Invitation 72.6KSymmetrical Variation 68.2KSlav Formation 34.6KCatalan Formation 25.3KReversed Alekhine 14KReversed Modern Defense 9,937Dutch Defense 6,256Myers Defense 797
20

Owen Defense

B00791,382 games

1.0%

of classified

Most played variations

B00 · Borg Defense 782.7KGuatemala Defense 8,716
21

Englund Gambit

A40770,604 games

1.0%

of classified

Most played variations

A40 · Zaire Defense 653.9KHartlaub-Charlick Gambit 88.1KSoller Gambit 27.7KMosquito Gambit 874
22

Van't Kruijs Opening

A00724,766 games

0.9%

of classified

Most played variations

A00 · Amar Opening 724.8K
23

Philidor Defense

C41693,842 games

0.9%

of classified

Most played variations

C41 693.8K
24

King's Pawn Game

B00-C40567,235 games

0.7%

of classified

Most played variations

Leonardis Variation 118.4KBusch-Gass Gambit 100.6KMaróczy Defense 82.6KWayward Queen Attack 59.8KMcConnell Defense 58KMacLeod Attack 39.8KNapoleon Attack 35.1KC20 · Center Game 16.3KKing's Head Opening 10.8KGunderam Gambit 10.3K
25

Petrov's Defense

C42539,242 games

0.7%

of classified

Most played variations

C42 539.2K
26

Slav Defense

D10538,578 games

0.7%

of classified

Most played variations

D10 538.6K
27

Bishop's Opening

C23-C24499,496 games

0.6%

of classified

Most played variations

C23 417.7KBerlin Defense 53.7KBoi Variation 17.2KPhilidor Counterattack 7,219Calabrese Countergambit 2,014Khan Gambit 1,665
28

Bird Opening

A02-A03480,237 games

0.6%

of classified

Most played variations

A02 248.7KDutch Variation 148.9KFrom's Gambit 55.7KWilliams Gambit 18.3KSturm Gambit 2,164Schlechter Gambit 1,597Horsefly Defense 833Wagner-Zwitersch Gambit 726Hobbs Gambit 619From's Gambit, Bahr Gambit 575
29

Nimzowitsch Defense

B00422,140 games

0.5%

of classified

Most played variations

Kennedy Variation 136.6KB00 · Borg Defense 90.3KDeclined Variation 89KScandinavian Variation 52.4KWilliams Variation 17.7KColorado Countergambit 13.4KMikenas Variation 10.5KFranco-Nimzowitsch Variation 6,956French Connection 3,327Pseudo-Spanish Variation 1,108
30

Center Game

C20402,310 games

0.5%

of classified

Most played variations

C20 402.3K
31

English Defense

A40385,092 games

0.5%

of classified

Most played variations

A40 · Zaire Defense 385.1K
32

Old Indian Defense

A41-A53383,089 games

0.5%

of classified

Most played variations

A41 · Wade Defense 210.8KA53 172.3K
33

Mieses Opening

A00380,676 games

0.5%

of classified

Most played variations

A00 · Amar Opening 345.1KReversed Rat 35.5KMyers Spike Attack 31
34

Dutch Defense

A80-A84339,322 games

0.4%

of classified

Most played variations

A80 102.6KNormal Variation 71.1KA84 50.1KClassical Variation 47.8KRaphael Variation 22.5KStaunton Gambit 11.7KHopton Attack 11.1KFianchetto Attack 10.3KStaunton Gambit Accepted 8,605Korchnoi Attack 1,760
35

King's Gambit

C30333,626 games

0.4%

of classified

Most played variations

C30 333.6K
36

King's Indian Attack

A05-A07333,006 games

0.4%

of classified

Most played variations

A07 182.5KSymmetrical Defense 61.2KA05 · Zukertort Opening 52.8KSicilian Variation 24.9KDouble Fianchetto 4,176Keres Variation 3,295Spassky Variation 2,496Omega-Delta Gambit 1,544
37

Elephant Gambit

C40273,109 games

0.3%

of classified

Most played variations

C40 · Latvian Gambit 273.1K
38

Blackmar-Diemer Gambit

D00271,768 games

0.3%

of classified

Most played variations

D00 · Amazon Attack 271.8K
39

King's Gambit Accepted

C33210,418 games

0.3%

of classified

Most played variations

C33 210.4K
40

Englund Gambit Declined

A40209,711 games

0.3%

of classified

Most played variations

Reversed French 79.3KReversed Alekhine 55.1KA40 · Zaire Defense 39.5KReversed Krebs 35.8K
41

Queen's Gambit Accepted

D20195,145 games

0.2%

of classified

Most played variations

D20 195.1K
42

Rat Defense

A41-C00193,265 games

0.2%

of classified

Most played variations

Small Center Defense 69.2KEnglish Rat 42KHarmonist 40.2KAntal Defense 35.6KBalogh Defense 5,979Petruccioli Attack 227Spike Attack 82
43

King's Gambit Declined

C30-C31190,532 games

0.2%

of classified

Most played variations

Queen's Knight Defense 94.1KFalkbeer Countergambit 60KClassical Variation 20.2KPetrov's Defense 6,207Keene's Defense 3,778Panteldakis Countergambit 2,559Norwalde Variation 2,236Mafia Defense 1,450Zilbermints Double Countergambit 3
44

Polish Opening

A00176,843 games

0.2%

of classified

Most played variations

A00 · Amar Opening 131.8KOutflank Variation 14.1KCzech Defense 7,984Bugayev Attack 7,462King's Indian Variation 6,101Birmingham Gambit 4,312Dutch Defense 1,775Baltic Defense 1,460Symmetrical Variation 829Grigorian Variation 659
45

Van Geet Opening

A00163,562 games

0.2%

of classified

Most played variations

A00 · Amar Opening 145.2KReversed Nimzowitsch 16KBattambang Variation 854Myers Attack 641Laroche Gambit 513Tübingen Gambit 299Billockus-Johansen Gambit 56Düsseldorf Gambit 6Twyble Attack 3Damhaug Gambit 1
46

East Indian Defense

A48145,708 games

0.2%

of classified

Most played variations

A48 · London System 145.7K
47

Center Game Accepted

C21145,033 games

0.2%

of classified

Most played variations

C21 · Center Game 145K
48

Trompowsky Attack

A45141,960 games

0.2%

of classified

Most played variations

A45 · Canard Opening 129.4KClassical Defense 12.5K
49

Saragossa Opening

A00136,856 games

0.2%

of classified

Most played variations

A00 · Amar Opening 136.9K
50

Réti Opening

A09105,138 games

0.1%

of classified

Most played variations

A09 89.1KAdvance Variation 11.9KRéti Accepted 4,050
51

Grob Opening

A00104,026 games

0.1%

of classified

Most played variations

A00 · Amar Opening 57.8KGrob Gambit 41.3KGrob Gambit Declined 4,342Double Grob 318Alessi Gambit 132London Defense 89Double Grob, Coca-Cola Gambit 3
52

St. George Defense

B0081,744 games

0.1%

of classified

Most played variations

B00 · Borg Defense 81.7KZilbermints Gambit 24
53

Latvian Gambit

C4075,720 games

0.1%

of classified

Most played variations

C40 75.7K
54

Mikenas Defense

A4070,294 games

0.1%

of classified

Most played variations

A40 · Zaire Defense 70.3K
55

Barnes Opening

A0058,793 games

0.1%

of classified

Most played variations

A00 · Amar Opening 55.9KHammerschlag 2,407Fool's Mate 452
56

Duras Gambit

B0050,838 games

0.1%

of classified

Most played variations

B00 · Borg Defense 50.8K
57

Anderssen's Opening

A0047,275 games

0.1%

of classified

Most played variations

A00 · Amar Opening 47.2KPolish Gambit 84
58

Polish Opening, with d5

A0033,889 games

0.0%

of classified

Most played variations

A00 · Amar Opening 33.9K
59

Kádas Opening

A0029,597 games

0.0%

of classified

Most played variations

A00 · Amar Opening 28.8KKoola-Koola Variation 481Beginner's Trap 234Schneider Gambit 88Kádas Gambit 12
60

Ware Opening

A0027,055 games

0.0%

of classified

Most played variations

A00 · Amar Opening 24KCrab Variation 1,221Symmetric Variation 989Meadow Hay Trap 810
61

Clemenz Opening

A0027,012 games

0.0%

of classified

Most played variations

A00 · Amar Opening 27KSpike Lee Gambit 20
62

Borg Defense

A40-B0026,962 games

0.0%

of classified

Most played variations

B00 17.2KBorg Gambit 5,720Borg Gambit 3,953Zilbermints Gambit 47
63

Barnes Defense

B0023,034 games

0.0%

of classified

Most played variations

B00 · Borg Defense 23K
64

Slav Indian

A5020,495 games

0.0%

of classified

Most played variations

A50 20.5K
65

Ware Defense

B0020,193 games

0.0%

of classified

Most played variations

B00 · Borg Defense 20.2KSnagglepuss Defense 38
66

Goldsmith Defense

B0017,866 games

0.0%

of classified

Most played variations

B00 · Borg Defense 17.8KPicklepuss Defense 30
67

Paleface Attack

A4517,252 games

0.0%

of classified

Most played variations

A45 · Canard Opening 17.3K
68

Gunderam Defense

C4017,168 games

0.0%

of classified

Most played variations

C40 · Latvian Gambit 17.2K
69

Carr Defense

B0016,221 games

0.0%

of classified

Most played variations

B00 · Borg Defense 16.2KZilbermints Gambit 22
70

Canard Opening

A4515,479 games

0.0%

of classified

Most played variations

A45 15.5K
71

Polish Defense

A4014,906 games

0.0%

of classified

Most played variations

A40 · Zaire Defense 14.9K
72

Mexican Defense

A5014,602 games

0.0%

of classified

Most played variations

A50 · Slav Indian 14.6K
73

Queen's Indian Accelerated

A5013,104 games

0.0%

of classified

Most played variations

A50 · Slav Indian 13.1K
74

Lasker Simul Special

A0010,195 games

0.0%

of classified

Most played variations

A00 · Amar Opening 10.2K
75

Pseudo Queen's Indian Defense

A478,149 games

0.0%

of classified

Most played variations

A47 · Marienbad System 8,149
76

Amar Opening

A006,299 games

0.0%

of classified

Most played variations

A00 6,299
77

King's Pawn Opening

C205,355 games

0.0%

of classified

Most played variations

C20 · Center Game 5,355
78

Kangaroo Defense

A405,023 games

0.0%

of classified

Most played variations

A40 · Zaire Defense 5,023
79

Valencia Opening

A004,747 games

0.0%

of classified

Most played variations

A00 · Amar Opening 4,747
80

Amazon Attack

D002,723 games

0.0%

of classified

Most played variations

D00 2,723
81

Sodium Attack

A002,560 games

0.0%

of classified

Most played variations

A00 · Amar Opening 2,560
82

Fried Fox Defense

B002,407 games

0.0%

of classified

Most played variations

B00 · Borg Defense 2,407
83

Portuguese Opening

C202,234 games

0.0%

of classified

Most played variations

C20 · Center Game 2,234
84

Hippopotamus Defense

B002,058 games

0.0%

of classified

Most played variations

B00 · Borg Defense 2,058
85

Global Opening

A002,013 games

0.0%

of classified

Most played variations

A00 · Amar Opening 2,013
86

Wade Defense

A411,675 games

0.0%

of classified

Most played variations

A41 1,675
87

Lemming Defense

B001,509 games

0.0%

of classified

Most played variations

B00 · Borg Defense 1,509
88

Creepy Crawly Formation

A001,171 games

0.0%

of classified

Most played variations

Classical Defense 1,171
89

English Orangutan

A15825 games

0.0%

of classified

Most played variations

A15 825
90

Montevideo Defense

A40825 games

0.0%

of classified

Most played variations

A40 · Zaire Defense 825
91

Australian Defense

A40770 games

0.0%

of classified

Most played variations

A40 · Zaire Defense 770
92

Bongcloud Attack

C20411 games

0.0%

of classified

Most played variations

C20 · Center Game 411
93

Döry Defense

A46297 games

0.0%

of classified

Most played variations

A46 297
94

Zukertort Defense

A04132 games

0.0%

of classified

Most played variations

Kingside Variation 110Sicilian Knight Variation 22

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