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In sports, strength of schedule (SOS) refers to the difficulty or ease of a team's/person's opponent as compared to other teams/persons. This is especially important if teams in a league do not play each other the same number of times. ==Computation== The strength of schedule can be calculated in many ways. Such calculations are the basis of many of the various tie-breaking systems used in Swiss-system tournaments in chess and other tabletop games. Before the 2004 season, in the American college football Bowl Championship Series (BCS) 〔(BCS Chronology ), BCSFootball.org.〕 the SOS was calculated as follows, where OR is the opponents' record, while OOR is the opponents' opponents record.〔(Strength of Schedule ) NationalChamps.net〕 } Other calculations include adding the opponent's power ratings and multiplying them by the number of games, or a modification by assigning weights (higher weights for "stronger" teams).〔(Strength of Schedule ), Laxpower.com〕 Furthermore, several more factors may be added, such as the position of the team in the league, the strength of the team's division or conference, which games count in the formula and which don't (vital in the Bowl Championship Series), the locations of the games (see home team and home advantage) and others. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「strength of schedule」の詳細全文を読む スポンサード リンク
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