Ma Dong
MaDong13
Beijing Shougong TT Club
π ζ΅·ζ·εΊ
π¨π³ CN
1452
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.
1543
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.
45.4
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.
90%
Win Rate
Wins Γ· (wins + losses). Requires at least 1 match.
9
Wins
1
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)1498 β 1588
95% (2Ο)1452 β 1634
99.7% (3Ο)1407 β 1679
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. | ||
|---|---|---|---|---|---|
| 5/24/2026 | |
π MaDong13 |  |
ZhouPeng49 | +3.0 |
| 5/4/2026 | |
MaDong13 |  |
π ZhuKai14 | -24.0 |
| 5/2/2026 |  |
HuangXia88 | |
π MaDong13 | +2.0 |
| 3/29/2026 |  |
SongQiang20 | |
π MaDong13 | -5.0 |
| 3/21/2026 |  |
XuBo11 | |
π MaDong13 | -12.0 |
| 3/9/2026 | |
π MaDong13 |  |
HuZhi15 | -25.0 |
| 2/22/2026 |  |
SunFei12 | |
π MaDong13 | -22.0 |
| 1/14/2026 |  |
LuoHui19 | |
π MaDong13 | +7.0 |
| 12/28/2025 | |
π MaDong13 |  |
GuoRui16 | +27.0 |
| 12/19/2025 | |
π MaDong13 |  |
LinLong17 | +71.0 |