Start by identifying the arrangement type, number of positions and whether people face the centre, outward or a specified direction.

A left–right relation depends on facing direction. Draw and label a consistent convention before placing people.

Distinguish immediate neighbours from a looser statement such as somewhere to the left; the constraints are not equivalent.

Anchor a definite clue and combine relative clues into blocks where justified, retaining all possible block positions.

In a circular arrangement with no fixed reference direction, rotationally equivalent drawings usually describe the same relative arrangement.

Test conditional possibilities without treating a temporary assumption as a confirmed fact. Record why a branch becomes impossible.

A conclusion is definite only if it holds in every arrangement satisfying all clues. Finding one valid arrangement is not enough when several exist.

Recheck each original clue after obtaining a full arrangement; local consistency can hide a contradiction elsewhere.

If the question asks what may be true, a single permitted arrangement can establish possibility, unlike a must-be-true question.

For a linear arrangement, number the positions from left to right on the page. A person’s left and right depend on whether that person faces north or south in the usual diagram convention. For a circle, fix one person at a reference position to eliminate rotations when only relative seating matters; do not mistake rotated copies for distinct solutions.

Build blocks from strong constraints: an immediately adjacent pair, a fixed end position, or an exact gap. If A sits immediately left of B while both face north, the page-order block is AB. If they face south, that relative-direction statement produces the opposite page order. Keep the facing assumption beside the block rather than silently changing it later.

A condition that C is two places away from D must be interpreted through the question’s exact wording: some puzzles mean a position difference of two, while others explicitly state that two persons sit between them. These are not equivalent. Translate every phrase into a positional constraint before assembling the arrangement.

Example: five persons A, B, C, D, E sit in a row facing north. A is at the left end; B sits immediately to A’s right; C sits immediately to B’s right; E is at the right end. The positions are A B C D E, with D forced into the only remaining seat. Each placement follows a constraint or exclusion, not a visual guess.

Now remove the condition fixing C relative to B. Positions three and four can contain C and D in either order. The puzzle no longer uniquely determines their positions. If a question asks who must sit third, neither should be asserted without further information. This distinction between a possible arrangement and a necessary conclusion is central to harder puzzles.

For a larger puzzle, create branches only when a genuine alternative remains and cross out a branch as soon as it violates a condition. Record the reason for rejection so a later step does not reintroduce the same assumption. At the end, recheck every original condition, not only the last few. A complete-looking diagram can still contain an unnoticed reversal or gap error.