Transposition
Reaching the same position by a different move order.
Two different sequences of moves arrive at the identical position — the game has transposed. Openings are a web of transpositions: an English can become a Queen's Gambit, a Réti a King's Indian Attack.
Understanding transpositions lets you steer toward structures you like and dodge lines you don't, using move order as a weapon.
Move-order tricks — offering a transposition the opponent must accept or decline — are how strong players avoid preparation and reach their pet structures.
Memorising a line by rote and being lost when the same position arrives via a different move order.
Related terms
See Transposition in your own games
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