26-Letter Puzzle Contest (10thth - 17thth July) has started Discuss
World Sudoku & Puzzle Championship 2026
ISC & SM and IPC & PR 2026

Jiacheng Song

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Real name Jiacheng Song
Puzzle Blog
Country China
Date registered2026-02-28 3:00 AM
Last logon2026-06-16 10:58 PM
Total posts
Rank
LMI RatingsCurrent RankCurrent RatingsBest RankBest RatingsRatings History
LMI Sudoku Ratings 287 446.7832 287 446.7832 History

Sudoku Ratings HistoryRatingsRank
2026R4 (Irregular & Converse) 446.7832 287
2026R3 (OE & Hybrids) 446.7832 298
2026R2 (Math & Outside) 446.7832 306
Sudoku Testjcsong's Rankjcsong's ScoreTest Max ScorePSRSNSW
2026R2 (Math & Outside) 75 86.5 141.283 727 835 754 1

PS = Prorated Score (Score based on players's score, median score and top score in the test)
RS = Rank Score (Score based on player's rank in the test)
NS = Normalized Score (.75 * PS + .25 * RS)
W = Weight of the test
Click here for detailed logic of LMI Player Rating System v2.0