They don't know what moves you are going to choose.
When opening names are shown, it is in reaction to the moves you and your opponent have already played.
opening moves readout names
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@1
"it knows what my next move is ?"
++ No it does not, it just reflects a shorthand description of moves by you and your opponent.
Do not worry about the names. They are just a short way to reference a move sequence.
Like 'he played Marshall' is shorter than "he played 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 O-O Be7 6 Re1 b5 7 Bb3 O-O 8 c3 d5."
Oct 22, 2022
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#5
The truth about chess at a high level, from what I can gather as an observer, is that GMs and the like really do know the various combinations of moves in the beginning. It's all been mapped out. That's what openings are. Best moves for both sides along some particular line.
1.e4 is King's Pawn Game. 1.e4 e5 may say Open Game. Then 1.e4 e5 2.Nf3 would say King's Knight Opening or something. That's because the definition changes as the moves change, at least until the move order settles into a particular opening line. If you see what I mean. Carry this out further, and at 1.e4 e5 2.Nf3 Nc6 it would still say something like King's Knight Game, but once you make the move that defines it as, say, the Ruy Lopez, then the definition changes when the move is made. That's what's going on.
thanks all for information it was very helpful
Oct 24, 2022
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#7
Opening can transpose into other openings through different move orders, which is why the opening name change even though you play the same move, since your opponent can play different things as reply.
Oct 24, 2022
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#8
The opening names given are just the name of what has been exactly played by both you and the opponent so far. As @cellen01 mentions, transpositions can later change the opening name as the game progresses. If you are curious about what the opening names themselves mean by category of chess opening, you can take a look at my detailed categorizing here:
every time i start a game it saids this guy's name or castle rook opening etc etc opening or that guy opening - Anderson opening etc
most times i use the same move to open - but usually a different opening name comes up -- how is that possible it knows what my next move is ? just wondering - i don't really use a named popular opening - cause my goal is to make 30 moves and up a regular thing till i get beat so my thinking is usually defensive only from the get go tell i can master first just of interest to me if anyone could explain i would be appreciated to that person