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The Tarrasch Rule,
formulated by Siegbert Tarrasch, is a rule of thumb (heuristic) applied in endgames and sometimes (late) middlegames with passed pawn(s) and rook(s) involved. Rooks should be placed "behind" own passers as well as candidates to support them, as well "behind" opponent passers to hold them.

The advantage of a rook intersecting the passers rear span is that it does not hinder the passer from queening, but indirectly controls its stop square with increasing vertical rook mobility the more the passer advances. Since the passers rear spans might also be occupied by other pieces, specially own or opponent file-immobile pawns, the passer should actually be defended or attacked by a rook from south (white passer) or north (black passer). Alternatively, with bitboards and fill stuff in mind, to determine the relevant subset of the rear span, the north- or south Dumb7- or Kogge-Stone occluded fill might be applied, only with pawns of both sides as obstructions.
Tarrasch by Frank Stiefel [1][2]

See also


External Links


References

  1. ^ Die Tarrasch-Verteidigung from Kania Chess books
  2. ^ Schachclub Leinzell - Schachkarikaturen von Frank Stiefel

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