Song Qiang
SongQiang60
Beijing Haidian TT Club
π ζ΅·ζ·εΊ
π¨π³ CN
1576
Rating
Bayesian conservative rating = ΞΌ β 2Ο. The system is 95% confident this player's skill is at least this value. More matches lower Ο and raise this number.
1643
ΞΌ (mean)
ΞΌ (Mu) is the best estimate of this player's skill level. Wins raise it, losses lower it. Beating a stronger player earns more than beating a weaker one.
33.7
Ο (uncertainty)
Ο (Sigma) = how confident the system is in the rating. Lower is better. New players start at Ο=200 β it falls with every match played.
54%
Win Rate
Wins Γ· (wins + losses). Requires at least 1 match.
7
Wins
6
Losses
Skill Confidence Intervals
Based on ΞΌ and Ο, the system estimates this player's skill range at different confidence levels. The smaller Ο is, the narrower the band.
68% (1Ο)1609 β 1677
95% (2Ο)1576 β 1710
99.7% (3Ο)1542 β 1744
Trust Level
How reliably this player submits match results. Formula: rejections per 10 submissions. Fewer rejections = higher trust.
No data
No submissions yet
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Login / RegisterRecent Matches
| Date | Player A | Player B | ΞΞΌ Change in ΞΌ after this match. Positive = won. The size depends on the skill gap between both players and their Ο values. | ||
|---|---|---|---|---|---|
| 5/30/2026 | |
π SongQiang60 |  |
ZhangMin83 | +3.0 |
| 5/30/2026 |  |
π LiuJing84 | |
SongQiang60 | -3.0 |
| 5/30/2026 |  |
π SunFei52 | |
SongQiang60 | +122.0 |
| 5/14/2026 | |
π LiuJing84 | |
SongQiang60 | -8.0 |
| 5/2/2026 | |
SongQiang60 |  |
π MaDong53 | -14.0 |
| 4/2/2026 | |
SongQiang60 |  |
π ZhaoGang27 | -13.0 |
| 3/22/2026 |  |
LinLong57 | |
π SongQiang60 | +4.0 |
| 3/14/2026 | |
π SongQiang60 |  |
XuBo51 | +8.0 |
| 2/24/2026 |  |
GuoRui56 | |
π SongQiang60 | +13.0 |
| 2/20/2026 | |
π SongQiang60 | |
SunFei52 | +14.0 |