About 50 years ago, the Yugoslav chess magazine Chess Informant introduced a new classification system for chess openings. For chess players it was like the invention of the metric system: it systematized the nomenclature that varied wildly from country to country. (For instance, your Spanish Opening is my Ruy Lopez.) Now all the openings and their subvariations are labeled with three-digit codes, from A00 to E99. They are called ECO codes, for “Encyclopedia of Chess Openings.”
This got me thinking yesterday: Is there any tournament player alive who has played all 500 opening variations? I think the answer is probably no. It would require too much cooperation from your opponents. However, a much more reasonable goal would be to play all 50 openings, defining an “opening” as the first two digits of the ECO code. This isn’t a perfect definition, of course. Some openings fit nicely into one ECO code (for example, B1 = Caro-Kann Defense) but others don’t (the King’s Indian Defense sprawls over four ECO codes, and a single code like E8 represents one variation of the King’s Indian Defense).
Nevertheless, playing all 50 ECO openings seems like a hard but feasible project. It’s like visiting all 50 states — which is also something I haven’t done. (I have missed Alabama, Arkansas, Kansas, North Dakota, South Dakota, Montana and Alaska.) How is my chess “itinerary” going? Well, let’s see.
| A | B | C | D | E | |
| 0 | y | y | y | y | y |
| 1 | y | y | y | ||
| 2 | y | y | y | y | y |
| 3 | y | y | y | y | y |
| 4 | y | y | y | y | y |
| 5 | y | y | y | y | |
| 6 | y | y | y | y | |
| 7 | y | y | |||
| 8 | y | y | y | ||
| 9 | y | y |
Dana’s Complete Opening History (since 1984) (“y” = an opening I’ve played in a rated game)
Some comments:
- This table reflects only my games since 1984, when I started keeping records of all my games. I have spotty records before that, but made no effort to include them here.
- My “missing openings” are A7 (Main Line Benoni), A9 (Leningrad Dutch), B6-9 (all open Sicilians!), C1 (Main Line French), D7 (Anti-Gruenfeld systems), E1 (Queen’s Indian), E5 (Nimzo-Indian with 4. e3 and 5. Nf3), E8 (King’s Indian Saemisch) and E9 (King’s Indian Main Lines).
- I feel certain that I played some of these openings in my pre-1984 days. I absolutely used to play open Sicilians as White, so B7-9 should be checked. I briefly toyed with the King’s Indian as Black, so it’s possible that E8 and E9 should be checked. And I also played the French for a little while as Black, so C1 should get a check, too. Main Line Benonis are quite rare in the U.S. among amateurs, because if they play the Benoni they always play the Benko Gambit. (For amateurs, the Benko is the main line.) However, it’s hard to believe I’ve never played any A7’s. The only openings I’m sure I haven’t played, either as White or as Black, are A9, B6, D7, and E1.
- The above table gives you an idea of my opening tastes. I eschew the open Sicilian. I do play the King’s Gambit (C3), which I think for many players would be a missing entry in their résumé. I play double e-pawn defenses as Black, which means that the entire C column from C2 on is checked. I tend to avoid main lines in any opening, which means that the bottom half of the table has more gaps than the top half. (The ECO system tends to put more offbeat lines at the top and more main line variations at the bottom.)
Maybe after I get my rating back up to master level I will try to fill in the rest of this table! Not before then, however.
Have any of you played all 50 openings? Are there any contemporary grandmasters who have played all 50? Maybe a versatile guy like Magnus Carlsen? Presumably if you have access to a games database you could write a fairly simple program to answer the question. But I’m lazy and I don’t know how to program, so I’ll leave it to somebody else.
