Determining plus/minus is not as simple as adding goals scored while a player is on the ice and subtracting goals allowed while a player is on the ice.

The plus/minus statistic attempts to measure how an individual player contributes to a team's success on the ice. A player is credited with a +1 when his team scores (even strength or short-handed) and he is on the ice, regardless of any direct involvement in the scoring play. Similarly, a player is charged with a -1 when his team allows a goal when he is on the ice.

Since a team on the power play has an automatic advantage, power-play goals do not factor into plus/minus calculation. As a result, a player who scores two power-play goals in a 2-0 victory has a plus/minus of zero (even) for the game. Players are also not charged with a -1 when allowing a goal on the power play.

When a short-handed goal is scored, all players on the ice for the scoring team are a +1 and all players on the power-play team are a -1. The plus/minus category is scored as follows in Yahoo! Sports Fantasy Hockey:

Head-to-Head: The team with the higher plus/minus for the week wins the category match-up. For example, +13 beats +8, +3 beats 0, -4 beats -7, etc.

Rotisserie: Teams are ranked first to last in the plus/minus category. The team with the highest plus/minus rating earns the most rotisserie points, the team with the lowest plus/minus rating earns one rotisserie point for finishing last in the category.

Points: Points are awarded by multiplying the player's plus/minus for the game times the scoring modifier selected by the league commissioner. If the scoring modifier is two and the player records a plus/minus of four, a total of eight points are awarded.