Mark Zaidelman

Rating history

Weekly performance shows the performance for daily puzzles solved during the corresponding week. It is nominated in universal scoring scale which allows to compare puzzles of different complexity. Rating is a cumulative value which is slowly adjusted every week towards the weekly performance. It shows long-term performance level. See the rating computation rules at help page.

Type performance

1178 (39 puzzles)
Antiknight Sudoku
1768 (2 puzzles)
Even/Odd Sudoku
1717 (3 puzzles)
Irregular Sudoku
1709 (6 puzzles)
Odd Sudoku
1634 (2 puzzles)
Perfect Square Sudoku
1589 (3 puzzles)
Consecutive Sudoku
1282 (3 puzzles)
No Touch Sudoku
1266 (3 puzzles)
Odd-Even-Big-Small
1015 (3 puzzles)
Antidiagonal Sudoku
783 (2 puzzles)
X Sums Sudoku
773 (4 puzzles)
Sudoku
756 (2 puzzles)
Diagonal Sudoku
704 (3 puzzles)
Skyscrapers Sudoku
1 (1 puzzle)
Fortress Sudoku
1 (2 puzzles)
792 (14 puzzles)
Easy as ABC
1613 (1 puzzle)
Top Heavy Number Place
1524 (2 puzzles)
Magic Snail
970 (3 puzzles)
Double Block
785 (2 puzzles)
Fuzuli
416 (2 puzzles)
Skyscrapers
372 (3 puzzles)
Kropki
0 (1 puzzle)
1352 (33 puzzles)
Queens
2229 (1 puzzle)
Point a Star
1952 (1 puzzle)
Hexa Minesweeper
1707 (2 puzzles)
Lighthouses
1698 (6 puzzles)
Battleships Minesweeper
1583 (2 puzzles)
Minesweeper
1576 (4 puzzles)
Star Battle
1098 (4 puzzles)
Gaps
1091 (7 puzzles)
Akari
1024 (2 puzzles)
Battleships
998 (2 puzzles)
Clouds
647 (2 puzzles)
1340 (39 puzzles)
Every Second Turn
2178 (2 puzzles)
Simple Loop
1848 (4 puzzles)
Alternate Loop
1790 (3 puzzles)
Hexa Fences
1717 (3 puzzles)
Minesweeper Loop
1559 (1 puzzle)
Country Road
1500 (2 puzzles)
Masyu
1355 (3 puzzles)
Russian Loop
1348 (2 puzzles)
Every Second Straight
1268 (3 puzzles)
Maxi Loop
1231 (4 puzzles)
Double Back
940 (2 puzzles)
Fences
851 (8 puzzles)
Chat Room
634 (2 puzzles)
1201 (18 puzzles)
Snakescope
1738 (4 puzzles)
Maxi Snake
1596 (3 puzzles)
Passage
1366 (3 puzzles)
Dutch Snake
1144 (1 puzzle)
Snake
1066 (3 puzzles)
Belarusian Snake
359 (4 puzzles)
1102 (41 puzzles)
Paint by Max
1643 (3 puzzles)
Hitori
1534 (6 puzzles)
LITS
1512 (3 puzzles)
Battenberg Painting
1355 (2 puzzles)
Nurikabe
1205 (3 puzzles)
Tapa
1133 (4 puzzles)
Heyawake
1106 (6 puzzles)
Paint by Hex
1092 (2 puzzles)
Cave
1000 (3 puzzles)
Easy as Coral
998 (1 puzzle)
Yin Yang
710 (4 puzzles)
Hexa Islands
1 (2 puzzles)
Kuromasu
0 (2 puzzles)
1228 (28 puzzles)
Fo-(Faibu-)seruzu
1598 (3 puzzles)
ABC Division
1444 (4 puzzles)
Araf
1370 (3 puzzles)
Spiral Galaxies
1339 (5 puzzles)
Black and white
1321 (3 puzzles)
Two Apiece
1152 (2 puzzles)
Shikaku
1065 (5 puzzles)
Neighbor Areas
473 (3 puzzles)
1304 (19 puzzles)
Slalom
1965 (2 puzzles)
Hungarian Pentomino
1875 (1 puzzle)
Suguru
1470 (2 puzzles)
Ripple Effect
1431 (4 puzzles)
Touching Pentomino
1287 (3 puzzles)
Chaos
955 (3 puzzles)
Tetroscope
896 (4 puzzles)