Song Qiang
SongQiang20
Beijing Chaoyang TT Club
π ζ΅·ζ·εΊ
π¨π³ CN
1232
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.
1415
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.
91.6
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.
40%
Win Rate
Wins Γ· (wins + losses). Requires at least 1 match.
4
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)1323 β 1507
95% (2Ο)1232 β 1598
99.7% (3Ο)1140 β 1690
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. | ||
|---|---|---|---|---|---|
| 5/25/2026 |  |
π LuoHui19 | |
SongQiang20 | -1.0 |
| 4/29/2026 |  |
GuoRui16 | |
π SongQiang20 | +8.0 |
| 3/29/2026 | |
SongQiang20 |  |
π MaDong13 | +3.0 |
| 3/13/2026 |  |
GaoYong18 | |
π SongQiang20 | +13.0 |
| 3/10/2026 | |
SongQiang20 |  |
π SunFei12 | -7.0 |
| 2/23/2026 | |
π SongQiang20 |  |
SunFei32 | +29.0 |
| 2/14/2026 |  |
π LinLong17 | |
SongQiang20 | +13.0 |
| 2/7/2026 | |
π SongQiang20 |  |
ZhuKai14 | +10.0 |
| 1/3/2026 |  |
π ZhuKai34 | |
SongQiang20 | +20.0 |
| 1/1/2026 | |
SongQiang20 |  |
π XuBo11 | -105.0 |