to leave the opening book early on purpose on say move 4 or 5 ? I play sicilian very often and I don't want to follow the opening book for eternity (at least not ALWAYS). Of course my move than should be very very careful, but 30 move openings can be pretty annoying, killing the joy of playing.
Originally posted by ivan2908It does if you're playing someone with a ski-slope graph & fancy a little bit of post-match analysis.
to leave the opening book early on purpose on say move 4 or 5 ? I play sicilian very often and I don't want to follow the opening book for eternity (at least not ALWAYS). Of course my move than should be very very careful, but 30 move openings can be pretty annoying, killing the joy of playing.
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Originally posted by ivan2908It can do. Kasparov did departed from book at move 1 against a computer (playing 1d3 or 1e3 - I forget which), to get the computer out of its enormous opening database. Same strategy makes sense v a human whose book knowledge is better than his overall strength (plenty of them about), and of course in CC where everyone has the ability to consult huge books but not everyone can think for themself.
to leave the opening book early on purpose on say move 4 or 5 ? I play sicilian very often and I don't want to follow the opening book for eternity (at least not ALWAYS). Of course my move than should be very very careful, but 30 move openings can be pretty annoying, killing the joy of playing.
Of course the objection is that a move so early in the game which isn't in the opening book can't be all that good. But often you can get away with it, especially with the white pieces. For example after 1 e4e5 2Nf3 Nc6, the most popular moves are Bc4, Bb5, d4 and Nc3, all of which are perfectly sensible moves, but Be2, on which there isn't a lot of theory, isn't going to get you into any trouble. It's rather unambitious - you're unlikely to get any advantage from the opening against decent play - but there's nothing really wrong with it, and it gets you right out of book.
More risky with the black pieces I suspect.
As long as there's a reason for the move other than merely avoiding book. Naturally you must take some care that the chosen move is sound. As an example, my opponent in this game Game 4365455 decided to abandon book on move 6. As it turned out there was a very good reason why that particular move wasn't "book", and the tactical refutation was easy to find. So the moral is to look before you leap.
A move doesn't have to be "book" to be playable. As long as the move aids in development and doesn't make a major positional concession (and of course doesn't lose to a tactical trick!) it is playable.
Super-GM Lajois Portisch once wrote that the purpose of the opening "is to get a playable middlegame."
Originally posted by ivan2908In my entire life i've never met one playing the Sicilian by the book for 30 moves.
to leave the opening book early on purpose on say move 4 or 5 ? I play sicilian very often and I don't want to follow the opening book for eternity (at least not ALWAYS). Of course my move than should be very very careful, but 30 move openings can be pretty annoying, killing the joy of playing.
After 10 moves it's mostly already out of book, so why worry. We're no GM's.