| -A |
| +A |
In the first instance (I), the White Column of Attack has the advantage and the Black formation has the disadvantage; in the second case (II), this condition is reversed.
COLUMN OF SUPPORT
A Column of Support has the superiority in position, as compared with the adverse Column of Support, whenever it contains more than the latter of the following advantages, viz.:
- I. One, or more, Passed Pawns.
- II. Two united Pawns, overlapping an adverse Pawn.
- III. Two isolated Pawns adjacent to a single adverse Pawn.
- IV. Three, or more, united Pawns at their fifth squares, opposed by a like number of adverse Pawns posted on their Normal Base Line.
- V. A majority of kindred Pawns on that side of the Board farthest from the adverse King.
The relative advantage and disadvantage of one Column of Support, over the opposing Column of Support, is expressed by the second term of the Strategic Syllogism, thus:
(I.)
| +S |
| -S |
or