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Sudoku (1)

Other names: Classic Sudoku

Instruction:
Place a digit from 1-9 in each empty cell in the grid such that each row, column and marked 3x3 box contains each digit exactly once.

Reference: WPF (1)

Notes:
Variants:
- Different sizes (i.e. 6x6, 12x12).

Examples:
WPF Puzzle GP 2020 - Round 7 (146)
WPF Puzzle GP 2022 - Round 3 (183)
WPF Sudoku GP 2014 - Playoffs (119)
WPF Sudoku GP 2014 - Round 1 (112)
WPF Sudoku GP 2014 - Round 2 (113)
WPF Sudoku GP 2014 - Round 3 (114)
WPF Sudoku GP 2014 - Round 4 (115)
WPF Sudoku GP 2014 - Round 5 (116)
WPF Sudoku GP 2014 - Round 6 (117)
WPF Sudoku GP 2014 - Round 7 (118)
WPF Sudoku GP 2015 - Playoffs (111)
WPF Sudoku GP 2015 - Round 1 (13)
WPF Sudoku GP 2015 - Round 2 (43)
WPF Sudoku GP 2015 - Round 3 (106)
WPF Sudoku GP 2015 - Round 4 (107)
WPF Sudoku GP 2015 - Round 5 (108)
WPF Sudoku GP 2015 - Round 6 (109)
WPF Sudoku GP 2015 - Round 7 (110)
WPF Sudoku GP 2015 - Round 8 (45)
WPF Sudoku GP 2016 - Playoffs (105)
WPF Sudoku GP 2016 - Round 1 (98)
WPF Sudoku GP 2016 - Round 2 (99)
WPF Sudoku GP 2016 - Round 3 (100)
WPF Sudoku GP 2016 - Round 4 (101)
WPF Sudoku GP 2016 - Round 5 (102)
WPF Sudoku GP 2016 - Round 6 (103)
WPF Sudoku GP 2016 - Round 7 (37)
WPF Sudoku GP 2016 - Round 8 (104)
WPF Sudoku GP 2017 - Playoffs (97)
WPF Sudoku GP 2017 - Round 1 (2)
WPF Sudoku GP 2017 - Round 2 (3)
WPF Sudoku GP 2017 - Round 3 (4)
WPF Sudoku GP 2017 - Round 4 (5)
WPF Sudoku GP 2017 - Round 5 (6)
WPF Sudoku GP 2017 - Round 6 (7)
WPF Sudoku GP 2017 - Round 7 (8)
WPF Sudoku GP 2017 - Round 8 (9)
WPF Sudoku GP 2018 - Playoffs (122)
WPF Sudoku GP 2018 - Round 1 (58)
WPF Sudoku GP 2018 - Round 2 (59)
WPF Sudoku GP 2018 - Round 3 (60)
WPF Sudoku GP 2018 - Round 4 (61)
WPF Sudoku GP 2018 - Round 5 (62)
WPF Sudoku GP 2018 - Round 6 (63)
WPF Sudoku GP 2018 - Round 7 (64)
WPF Sudoku GP 2018 - Round 8 (67)
WPF Sudoku GP 2019 - Round 1 (124)
WPF Sudoku GP 2019 - Round 2 (125)
WPF Sudoku GP 2019 - Round 3 (126)
WPF Sudoku GP 2019 - Round 4 (127)
WPF Sudoku GP 2019 - Round 5 (128)
WPF Sudoku GP 2019 - Round 6 (129)
WPF Sudoku GP 2019 - Round 7 (130)
WPF Sudoku GP 2019 - Round 8 (131)
WPF Sudoku GP 2020 - Round 1 (148)
WPF Sudoku GP 2020 - Round 2 (149)
WPF Sudoku GP 2020 - Round 3 (150)
WPF Sudoku GP 2020 - Round 4 (151)
WPF Sudoku GP 2020 - Round 5 (152)
WPF Sudoku GP 2020 - Round 6 (153)
WPF Sudoku GP 2020 - Round 7 (154)
WPF Sudoku GP 2020 - Round 8 (155)
WPF Sudoku GP 2021 - Round 1 (157)
WPF Sudoku GP 2021 - Round 2 (158)
WPF Sudoku GP 2021 - Round 3 (159)
WPF Sudoku GP 2021 - Round 4 (160)
WPF Sudoku GP 2021 - Round 5 (161)
WPF Sudoku GP 2021 - Round 6 (162)
WPF Sudoku GP 2021 - Round 7 (163)
WPF Sudoku GP 2021 - Round 8 (164)
WPF Sudoku GP 2022 - Round 1 (173)
WPF Sudoku GP 2022 - Round 2 (174)
WPF Sudoku GP 2022 - Round 3 (175)
WPF Sudoku GP 2022 - Round 4 (176)
WPF Sudoku GP 2022 - Round 5 (177)
WPF Sudoku GP 2022 - Round 6 (178)
WPF Sudoku GP 2022 - Round 7 (179)
WPF Sudoku GP 2022 - Round 8 (180)
Child puzzles:
% Sudoku
0 to 9 Sudoku
24-Trio Sudoku
3D Sudoku
Anti-Knight Sudoku
Arrow Sudoku
Ascending Starters Sudoku
Battenburg Sudoku
Battleships Sudoku
Before 9 Sudoku
Between Sudoku
Block Sum Relations Sudoku
Braille Sudoku
Bust Sudoku
Chess Kings Sudoku
Clock Faces Sudoku
Clock Sudoku
Clone Sudoku
Cloned Strands Sudoku
Coded pairs Sudoku
Consecutive Sudoku
Counting neighbours Sudoku
Dead or Alive Arrows Sudoku
Deficit Sudoku
Descriptive Pairs Sudoku
Detection Sudoku
Determinant Sudoku
Diagonal pairs Sudoku
Diagonal Sudoku
Disjoint Groups Sudoku
Disparity Sudoku
Distance Sudoku
Divisible by Three Sudoku
Divisor Sudoku
Double Sandwich Sudoku
Double Sudoku
Dragon Sudoku
Either Or Sudoku
Elimination Sudoku
Emitters Sudoku
Equal Sum Lines Sudoku
Even Sandwich Sudoku
Expanded Sudoku
Extra Regions Sudoku
Extra Space Sudoku
Figure Sum Sudoku
Figures Sudoku
First Impression Sudoku
Fives Sudoku
Flip-flop classics Sudoku
Football Sudoku
Fortress Sudoku
Full Rank Sudoku
German Whispers Sudoku
Half-mosaic Sudoku
Hit the Target Sudoku
Irregular Sudoku
Killer Sudoku
Kropki Sudoku
LC Sudoku
Letter Sudoku
Lonely Number Sudoku
Magic Squares Sudoku
Mathdoku
Max Ascending Sudoku
Meandering Diagonals Sudoku
Missing Digit Sudoku
Multi Sudoku
Multiples Sudoku
Multiplication Table Sudoku
Neighbor Sums Sudoku
Next to 9 Sudoku
No Even Neighbours Sudoku
No Touch Sudoku
Non-Consecutive Sudoku
Numbered Rooms Sudoku
Odd Even Bridge Sudoku
Odd Sums Sudoku
Odd Tapa Sudoku
Odd-Even-Big-Small Sudoku
Odd/Even Sudoku
Offset Sudoku
One-five-nine Sudoku
Orthogonal spacing Sudoku
Outside Sudoku
Overlapping Sudoku
Paint It Black Sudoku
Palindrome Sudoku
Pandigital Sudoku
Parquet Sudoku
Perfect Squares Sudoku
Pinocchio Sudoku
Placement Sudoku
Point to Next Sudoku
Pointing Digits Sudoku
Prague star Sudoku
Product Sudoku
Pyramidal Sudoku
Quad Max Sudoku
Quadruple Sudoku
Queen Sudoku
Rank Sudoku
Ratio Sudoku
Renban Sudoku
Repeated Neighbors Sudoku
Roman Numeral Sudoku
Round Off Sudoku
Same sum Sudoku
Search Nine Sudoku
Sequences Sudoku
Shape Sudoku
Snowflake Sudoku
Spiral Sudoku
Step by step Sudoku
Subsets Sudoku
Substitution Sudoku
Sudoku N
Sukaku
Sum 100 Sudoku
Sum Sandwich Sudoku
Surplus Sudoku
Symmetric Unequal Sudoku
Thermo Sudoku
Tic-Tac-Toe Winner Sudoku
Tight Fit Sudoku
Top Heavy Sudoku
Total Blackout Sudoku
Transfer Sudoku
Triomino Sudoku
Triple Sum Sudoku
Unicorn Sudoku
Unique rectangles Sudoku
Wildcard Sudoku
X-One Sudoku
X-Sums Sudoku
Related puzzles:
Cross-Number Sudoku
Easy As Sudoku
Inequality Sudoku
Japanese Sums Sudoku
Mastermind Sudoku
Mathrax Sudoku
Set Double Block Sudoku
Skyscrapers Sudoku
Sudoku with Stars
Sudokuro