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You can play sudoku variants released earlier here

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Classic sudoku

rules

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the rows, columns, 3x3 box.

Today's puzzle: Renban Groups

rules

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the rows, columns, 3x3 box. Additionally, marked extra regions must contain consecutive digits (example: 2, 3, 4; 6, 7, 8, 9 etc.).
Sudoku variants released earlier:
  • 01.05.2012 - Jigsaw sudoku
  • 02.05.2012 - Diagonal sudoku
  • 03.05.2012 - Windoku
  • 04.05.2012 - Jigsaw sudoku
  • 05.05.2012 - Diagonal sudoku
  • 06.05.2012 - Windoku
  • 07.05.2012 - Greater Than
  • 08.05.2012 - Consecutive sudoku
  • 09.05.2012 - Greater Than
  • 10.05.2012 - Consecutive sudoku
  • 11.05.2012 - Diagonal and Windoku
  • 12.05.2012 - Irregular and Consecutive
  • 13.05.2012 - Diagonal sudoku
  • 14.05.2012 - Diagonal and Greater Than
  • 15.05.2012 - Consecutive sudoku
  • 16.05.2012 - Windoku
  • 17.05.2012 - Jigsaw sudoku
  • 18.05.2012 - Greater Than
  • 19.05.2012 - Diagonal and Windoku
  • 20.05.2012 - Irregular and Consecutive
  • 21.05.2012 - Diagonal sudoku
  • 22.05.2012 - Windoku
  • 23.05.2012 - Even sudoku
  • 24.05.2012 - Diagonal sudoku
  • 25.05.2012 - Jigsaw sudoku
  • 26.05.2012 - Diagonal Odd Sudoku
  • 27.05.2012 - Non-consecutive sudoku
  • 28.05.2012 - Skyscrapers
  • 29.05.2012 - Diagonal sudoku
  • 30.05.2012 - Odd sudoku
  • 31.05.2012 - Quadruple
  • 01.06.2012 - Diagonal Even
  • 02.06.2012 - Jigsaw sudoku
  • 03.06.2012 - Windoku
  • 04.06.2012 - Five Pair Sudoku
  • 05.06.2012 - Magic Summer Sudoku
  • 06.06.2012 - Gappy Consecutive Sudoku
  • 07.06.2012 - Alternative Sudoku
  • 08.06.2012 - Arrow Sudoku
  • 09.06.2012 - Quadruple
  • 10.06.2012 - Diagonal sudoku
  • 11.06.2012 - Twin Detector Sudoku
  • 12.06.2012 - Odd sudoku
  • 13.06.2012 - Kropki
  • 14.06.2012 - Thermo-sudoku
  • 15.06.2012 - Diagonal sudoku
  • 16.06.2012 - Even sudoku
  • 17.06.2012 - Mathdoku
  • 18.06.2012 - Skyscrapers
  • 19.06.2012 - Even sudoku
  • 20.06.2012 - Diagonal Sudoku
  • 21.06.2012 - Consecutive sudoku
  • 22.06.2012 - Jigsaw sudoku
  • 23.06.2012 - Sum Sudoku
  • 24.06.2012 - Non-consecutive sudoku
  • 25.06.2012 - Diagonal sudoku
  • 26.06.2012 - Windoku
  • 27.06.2012 - Consecutive sudoku
  • 28.06.2012 - Greater Than
  • 29.06.2012 - Jigsaw sudoku
  • 30.06.2012 - Odd sudoku
  • 01.07.2012 - Sudoku extraregions
  • 02.07.2012 - Diagonal even
  • 03.07.2012 - Mathdoku
  • 04.07.2012 - Kropki
  • 05.07.2012 - Sudoku extraregions
  • 06.07.2012 - Jigsaw sudoku
  • 07.07.2012 - Greater Than
  • 08.07.2012 - Diagonal sudoku
  • 09.07.2012 - Quadruple
  • 10.07.2012 - Odd sudoku
  • 11.07.2012 - Diagonal and Windoku
  • 12.07.2012 - Skyscrapers
  • 13.07.2012 - Non-consecutive sudoku
  • 14.07.2012 - Diagonal sudoku
  • 15.07.2012 - Jigsaw sudoku
  • 16.07.2012 - The greater
  • 17.07.2012 - Antiknight (to fullfill jzverina's wish)
  • 18.07.2012 - Even sudoku
  • 19.07.2012 - Diagonal sudoku
  • 20.07.2012 - Consecutive sudoku
  • 21.07.2012 - Jigsaw sudoku
  • 22.07.2012 - Outside sums
  • 23.07.2012 - Thermo-sudoku (the competition variant was prepared by player KrtekHonza)
  • 24.07.2012 - Odd sudoku
  • 25.07.2012 - Non-consecutive sudoku
  • 26.07.2012 - Mathdoku (to fullfill Ziti's wish)
  • 27.07.2012 - Diagonal sudoku
  • 28.07.2012 - Greater Than
  • 29.07.2012 - Little killer
  • 30.07.2012 - Arrow Sudoku (the competition variant was prepared by player KrtekHonza)
  • 31.07.2012 - Diagonal sudoku
  • 01.08.2012 - Jigsaw sudoku
  • 02.08.2012 - Kropki
  • 03.08.2012 - Thermo-sudoku (the competition variant was prepared by player KrtekHonza)
  • 04.08.2012 - Even sudoku
  • 05.08.2012 - Skyscrapers
  • 06.08.2012 - Diagonal sudoku
  • 07.08.2012 - Little killer (the competition variant was prepared by player KrtekHonza)
  • 08.08.2012 - Antiknight
  • 09.08.2012 - Odd sudoku
  • 10.08.2012 - Arrow Sudoku (the competition variant was prepared by player KrtekHonza)
  • 11.08.2012 - Windoku
  • 12.08.2012 - Non-consecutive sudoku
  • 13.08.2012 - Diagonal sudoku
  • 14.08.2012 - Antiknight
  • 15.08.2012 - Killer sudoku
  • 16.08.2012 - Untouchable
  • 17.08.2012 - Even sudoku
  • 18.08.2012 - Antidiagonal sudoku
  • 19.08.2012 - Little killer (the competition variant was prepared by player KrtekHonza)
  • 20.08.2012 - Sudoku extraregions
  • 21.08.2012 - Diagonal sudoku
  • 22.08.2012 - More-Less sudoku (to fullfill sudophile's wish)
  • 23.08.2012 - Greater Than
  • 24.08.2012 - Odd sudoku
  • 25.08.2012 - Killer sudoku
  • 26.08.2012 - Consecutive sudoku
  • 27.08.2012 - Jigsaw sudoku
  • 28.08.2012 - Diagonal sudoku
  • 29.08.2012 - Quadruple
  • 30.08.2012 - Twin Detector Sudoku
  • 31.08.2012 - Thermo-sudoku (the competition variant was prepared by player KrtekHonza)
  • 01.09.2012 - Even sudoku
  • 02.09.2012 - Outside sums
  • 03.09.2012 - Killer sudoku
  • 04.09.2012 - Jigsaw sudoku
  • 05.09.2012 - Kropki
  • 06.09.2012 - Diagonal sudoku
  • 07.09.2012 - Windoku
  • 08.09.2012 - Odd sudoku
  • 09.09.2012 - No four in a grow Sudoku
  • 10.09.2012 - Sudoku extraregions
  • 11.09.2012 - Arrow Sudoku (the competition variant was prepared by player KrtekHonza)
  • 12.09.2012 - Greater Than
  • 13.09.2012 - Diagonal sudoku
  • 14.09.2012 - Windoku
  • 15.09.2012 - Non-consecutive sudoku
  • 16.09.2012 - Even sudoku
  • 17.09.2012 - Renban sudoku (the competition variant was prepared by player jzverina)
  • 18.09.2012 - Jigsaw sudoku
  • 19.09.2012 - Diagonal sudoku
  • 20.09.2012 - No three in row consecutive sudoku (the competition variant was prepared by player jzverina)
  • 21.09.2012 - Quadruple
  • 22.09.2012 - Odd sudoku
  • 23.09.2012 - Antiknight
  • 24.09.2012 - Little killer (the competition variant was prepared by player KrtekHonza)
  • 25.09.2012 - Diagonal sudoku
  • 26.09.2012 - Skyscrapers
  • 27.09.2012 - Twin Detector Sudoku
  • 28.09.2012 - Sum sudoku
  • 29.09.2012 - Even sudoku
  • 30.09.2012 - Sudoku extraregions
  • 01.10.2012 - Jigsaw sudoku
  • 02.10.2012 - Diagonal sudoku
  • 03.10.2012 - Five Pair Sudoku
  • 04.10.2012 - Killer sudoku
  • 05.10.2012 - Alternative Sudoku
  • 06.10.2012 - Odd sudoku
  • 07.10.2012 - Antidiagonal sudoku
  • 08.10.2012 - Untouchable
  • 09.10.2012 - Diagonal sudoku
  • 10.10.2012 - Palindrome sudoku (to fullfill sudophile's wish)
  • 11.10.2012 - Antiknight
  • 12.10.2012 - XV sudoku (to fullfill MrLiang's wish)
  • 13.10.2012 - Even sudoku
  • 14.10.2012 - Greater Than Killer (to fullfill squick's wish)
  • 15.10.2012 - Diagonal and Windoku
  • 16.10.2012 - Consecutive Sudoku
  • 17.10.2012 - Diagonal Sudoku
  • 18.10.2012 - Jigsaw Sudoku
  • 19.10.2012 - No Four in a Grow Sudoku
  • 20.10.2012 - Diagonal Odd Sudoku
  • 21.10.2012 - Mathdoku (to fullfill Ziti's wish)
  • 22.10.2012 - Disjoint Groups
  • 23.10.2012 - Diagonal Sudoku
  • 24.10.2012 - Symmetric Unequal
  • 25.10.2012 - Queens
  • 26.10.2012 - Touchy
  • 27.10.2012 - Sudoku Extraregions
  • 28.10.2012 - Trio Sudoku (to fullfill dp_94's wish)
  • 29.10.2012 - Little Killer
  • 30.10.2012 - Diagonal Sudoku
  • 31.10.2012 - Non-consecutive Sudoku
  • 01.11.2012 - Sequences Sudoku (the competition variant was prepared by player MrLiang)
  • 02.11.2012 - Quadruple
  • 03.11.2012 - Greater Than
  • 04.11.2012 - Odd Sudoku
  • 05.11.2012 - Group Sum Sudoku (the competition variant was prepared by player MrLiang)
  • 06.11.2012 - Diagonal Sudoku
  • 07.11.2012 - Jigsaw Sudoku
  • 08.11.2012 - Windoku
  • 09.11.2012 - Pandigital sudoku (the competition variant was prepared by player MrLiang)
  • 10.11.2012 - Kropki
  • 11.11.2012 - Even Sudoku
  • 12.11.2012 - Untouchable
  • 13.11.2012 - Diagonal Sudoku
  • 14.11.2012 - Queens
  • 15.11.2012 - Consecutive sudoku (the competition variant was prepared by player MrLiang)
  • 16.11.2012 - Antiknight
  • 17.11.2012 - XV Sudoku
  • 18.11.2012 - Odd Sudoku
  • 19.11.2012 - Disjoint Groups
  • 20.11.2012 - Diagonal Sudoku
  • 21.11.2012 - Twin Detector Sudoku
  • 22.11.2012 - Outside Sums
  • 23.11.2012 - Kropki (the competition variant was prepared by player MrLiang)
  • 24.11.2012 - Symmetric Unequal
  • 25.11.2012 - Even Sudoku
  • 26.11.2012 - Greater Than
  • 27.11.2012 - Diagonal Sudoku
  • 28.11.2012 - Killer Sudoku
  • 29.11.2012 - Jigsaw Sudoku
  • 30.11.2012 - Antidiagonal Sudoku
  • 01.12.2012 - Sudoku Extraregions
  • 02.12.2012 - Odd Sudoku
  • 03.12.2012 - Skyscrapers
  • 04.12.2012 - Diagonal Sudoku
  • 05.12.2012 - Fortress Sudoku
  • 06.12.2012 - Little Killer
  • 07.12.2012 - Non-consecutive Sudoku
  • 08.12.2012 - Thermo-sudoku
  • 09.12.2012 - Prime Sudoku (the competition variant was prepared by player MrLiang)
  • 10.12.2012 - Diagonal Sudoku
  • 11.12.2012 - Diagonal Sudoku
  • 12.12.2012 - Consecutive Sudoku
  • 13.12.2012 - No Four in a Grow Sudoku
  • 14.12.2012 - Sum Sudoku
  • 15.12.2012 - Trio Sudoku (to fullfill jaku111's wish)
  • 16.12.2012 - Alternative Sudoku
  • 17.12.2012 - Antiknight
  • 18.12.2012 - Diagonal Sudoku
  • 19.12.2012 - Mathdoku
  • 20.12.2012 - Kropki
  • 21.12.2012 - Fortress Sudoku
  • 22.12.2012 - Greater Than
  • 23.12.2012 - Group Sum Sudoku (to fullfill jaku111's wish)
  • 24.12.2012 - Jigsaw Sudoku
  • 25.12.2012 - Snowflake (the competition variant was prepared by player MrLiang)
  • 26.12.2012 - Killer Sudoku (to fullfill moon58's wish)
  • 27.12.2012 - Greater Than (to fullfill Čert's wish)
  • 28.12.2012 - Quadruple
  • 29.12.2012 - Gappy Consecutive Sudoku
  • 30.12.2012 - 3-Cyclic (the competition variant was prepared by player MrLiang)
  • 31.12.2012 - Diagonal Sudoku
  • 01.01.2013 - Renban Sudoku (the competition variant was prepared by player jzverina)
  • 02.01.2013 - Windoku
  • 03.01.2013 - The Greater
  • 04.01.2013 - Jigsaw Sudoku
  • 05.01.2013 - Three Different (the competition variant was prepared by player jzverina)
  • 06.01.2013 - Diagonal Even Sudoku
  • 07.01.2013 - Little Killer (the competition variant was prepared by player jzverina)
  • 08.01.2013 - Diagonal Sudoku
  • 09.01.2013 - Antiknight
  • 10.01.2013 - No three in row consecutive sudoku (the competition variant was prepared by player jzverina)
  • 11.01.2013 - Disjoint groups
  • 12.01.2013 - Sudoku Extraregions
  • 13.01.2013 - Odd Sudoku
  • 14.01.2013 - Killer Sudoku (practice on SC9)
  • 15.01.2013 - Diagonal Sudoku
  • 16.01.2013 - XV Sudoku (practice on SC9)
  • 17.01.2013 - Notwo Sudoku (practice on SC9)
  • 18.01.2013 - Twin Detector Sudoku (practice on SC9)
  • 19.01.2013 - Kropki (to fullfill jaku111's wish)
  • 20.01.2013 - Even Sudoku
  • 21.01.2013 - Mathdoku (practice on SC9)
  • 22.01.2013 - The Greater (practice on SC9)
  • 23.01.2013 - Quadruple (practice on SC9)
  • 24.01.2013 - Fortress Sudoku (practice on SC9)
  • 25.01.2013 - Antiknight (practice on SC9)
  • 26.01.2013 - Diagonal Sudoku
  • 27.01.2013 - Odd Sudoku
  • 28.01.2013 - Sudoku Extraregions
  • 29.01.2013 - Diagonal Sudoku
  • 30.01.2013 - Difference Sudoku (the competition variant was prepared by player jzverina)
  • 31.01.2013 - Consecutive Sudoku (the competition variant was prepared by player jzverina)
  • 01.02.2013 - Sum Sudoku
  • 02.02.2013 - Skyscrapers
  • 03.02.2013 - Even Sudoku
  • 04.02.2013 - Renban Groups (practice on LMI WPF Sudoku GP)
  • 05.02.2013 - Coded Pair (practice on LMI WPF Sudoku GP)
  • 06.02.2013 - Repeated Neighbours (practice on LMI WPF Sudoku GP)
  • 07.02.2013 - Thermo-sudoku (practice on LMI WPF Sudoku GP)
  • 08.02.2013 - Odd Even Frame (practice on LMI WPF Sudoku GP)
  • 09.02.2013 - Disjoint Groups (practice on LMI WPF Sudoku GP)
  • 10.02.2013 - Diagonal Sudoku (practice on LMI WPF Sudoku GP)
  • 11.02.2013 - Odd Sudoku
  • 12.02.2013 - Jigsaw Sudoku
  • 13.02.2013 - Non-consecutive Sudoku
  • 14.02.2013 - Order Sudoku (the competition variant was prepared by player jzverina)
  • 15.02.2013 - Sudoku Extraregions
  • 16.02.2013 - Outside Sums
  • 17.02.2013 - Touchy
  • 18.02.2013 - Between 1 and 9 (practice on DSM WPF Sudoku GP)
  • 19.02.2013 - Equal Sudoku (practice on DSM WPF Sudoku GP)
  • 20.02.2013 - Search Nine Sudoku (practice on DSM WPF Sudoku GP)
  • 21.02.2013 - Arrow Sudoku (practice on DSM WPF Sudoku GP)
  • 22.02.2013 - X-Sums Sudoku (practice on DSM WPF Sudoku GP)
  • 23.02.2013 - Little Killer Killer Sudoku (practice on DSM WPF Sudoku GP)
  • 24.02.2013 - Skyscrapers (practice on DSM WPF Sudoku GP)
  • 25.02.2013 - Even Sudoku
  • 26.02.2013 - Diagonal Sudoku
  • 27.02.2013 - Consecutive Sudoku
  • 28.02.2013 - Greater Than
  • 01.03.2013 - Queens
  • 02.03.2013 - Symmetric Unequal
  • 03.03.2013 - Sudoku Extraregions
  • 04.03.2013 - Diagonal Sudoku
  • 05.03.2013 - Killer Sudoku
  • 06.03.2013 - Arrow Sudoku
  • 07.03.2013 - Diagonal and Windoku
  • 08.03.2013 - Sum Skyscrapers (the competition variant was prepared by player jzverina)
  • 09.03.2013 - Palindrome Sudoku
  • 10.03.2013 - Odd Sudoku
  • 11.03.2013 - Multiple Sudoku (the competition variant was prepared by player MrLiang)
  • 12.03.2013 - Diagonal Sudoku
  • 13.03.2013 - Zigzag Sudoku (the competition variant was prepared by player Mahyar)
  • 14.03.2013 - Untouchable
  • 15.03.2013 - Twin Detector Sudoku (to fullfill Black Tiger's wish)
  • 16.03.2013 - Mathdoku
  • 17.03.2013 - Diagonal Even Sudoku
  • 18.03.2013 - Antiknight
  • 19.03.2013 - Diagonal Sudoku
  • 20.03.2013 - Jigsaw Sudoku
  • 21.03.2013 - Quadruple
  • 22.03.2013 - No Four in a Grow Sudoku
  • 23.03.2013 - Five Pair Sudoku
  • 24.03.2013 - Alternative Sudoku
  • 25.03.2013 - Non-consecutive Sudoku
  • 26.03.2013 - Diagonal Sudoku
  • 27.03.2013 - Sum Sudoku
  • 28.03.2013 - Fortress Sudoku
  • 29.03.2013 - Little Killer
  • 30.03.2013 - Kropki
  • 31.03.2013 - Odd Sudoku
  • 01.04.2013 - XV Sudoku
  • 02.04.2013 - Diagonal Sudoku
  • 03.04.2013 - Greater Than
  • 04.04.2013 - Thermo-sudoku
  • 05.04.2013 - Consecutive Sudoku
  • 06.04.2013 - Diagonal Sudoku - Change!
  • 07.04.2013 - Even Sudoku
  • 08.04.2013 - Non-consecutive Sudoku
  • 09.04.2013 - Diagonal Sudoku
  • 10.04.2013 - Diagonal Skyscrapers (the competition variant was prepared by player jzverina)
  • 11.04.2013 - The Greater
  • 12.04.2013 - Killer Sudoku
  • 13.04.2013 - Antidiagonal Sudoku
  • 14.04.2013 - Sudoku Extraregions
  • 15.04.2013 - Quadruple (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 16.04.2013 - Arrow Sudoku (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 17.04.2013 - Tennis Sudoku (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 18.04.2013 - Little Killer (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 19.04.2013 - Thermo-sudoku (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 20.04.2013 - Renban Groups (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 21.04.2013 - Jigsaw Sudoku (practice on WPF Sudoku Grand Prix — Serbian Round)
  • 22.04.2013 - Odd Sudoku
  • 23.04.2013 - Diagonal Sudoku
  • 24.04.2013 - Consecutive Sudoku
  • 25.04.2013 - Antiknight
  • 26.04.2013 - Greater Than
  • 27.04.2013 - Windoku
  • 28.04.2013 - Twin Detector Sudoku
  • 29.04.2013 - Disjoint Groups
  • 30.04.2013 - Diagonal Sudoku
  • 01.05.2013 - Figure sudoku
  • 02.05.2013 - Untouchable
  • 03.05.2013 - Skyscrapers
  • 04.05.2013 - Even Sudoku
  • 05.05.2013 - Notwo Sudoku
  • 06.05.2013 - XV Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 07.05.2013 - Diagonal Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 08.05.2013 - Thermo Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 09.05.2013 - Deficit Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 10.05.2013 - Killer Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 11.05.2013 - Surplus Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 12.05.2013 - Palindrome Sudoku (practice on WPF Sudoku Grand Prix — UK Sudoku Championship)
  • 13.04.2013 - Diagonal Sudoku
  • 14.04.2013 - Jigsaw Sudoku
  • 15.05.2013 - Non-consecutive Sudoku
  • 16.05.2013 - Odd Sudoku
  • 17.05.2013 - Outside Sums
  • 18.05.2013 - Mathdoku
  • 19.05.2013 - Queens
  • 20.05.2013 - Consecutive Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 21.05.2013 - Arrow Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 22.05.2013 - Thermo Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 23.05.2013 - Dynasty Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 24.05.2013 - Property Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 25.05.2013 - Jigsaw Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 26.05.2013 - Killer Sudoku (practice on WPF Sudoku Grand Prix — U.S. Sudoku Team Qualifying Test)
  • 27.05.2013 - Sudoku Extraregions
  • 28.05.2013 - Diagonal Sudoku
  • 29.05.2013 - Windoku
  • 30.05.2013 - Symmetric unequal
  • 31.05.2013 - No Four in a Grow Sudoku
  • 01.06.2013 - Odd Sudoku
  • 02.06.2013 - Greater Than
  • 03.06.2013 - Touchy
  • 04.06.2013 - Diagonal Sudoku
  • 05.06.2013 - Twin Detector Sudoku (to fullfill Black Tiger's wish)
  • 06.06.2013 - Kropki
  • 07.06.2013 - Alternative Sudoku
  • 08.06.2013 - Even Sudoku
  • 09.06.2013 - Fortress Sudoku (to fullfill Black Tiger's wish)
  • 10.06.2013 - XV Sudoku (practice on NSC of Czech Republic)
  • 11.06.2013 - Antiknight (practice on NSC of Czech Republic)
  • 12.06.2013 - Worddoku (practice on NSC of Czech Republic)
  • 13.06.2013 - Skyscrapers (practice on NSC of Czech Republic)
  • 14.06.2013 - NEWS (practice on NSC of Czech Republic)
  • 15.06.2013 - Odd Sudoku (practice on NSC of Czech Republic)
  • 16.06.2013 - Diagonal Sudoku (practice on NSC of Czech Republic)
  • 17.06.2013 - Even Sudoku
  • 18.06.2013 - One Digit Unique Solution (practice on WPF Sudoku Grand Prix — Turkish Round)
  • 19.06.2013 - Odd Tab (practice on WPF Sudoku Grand Prix — Turkish Round)
  • 20.06.2013 - A or B (practice on WPF Sudoku Grand Prix — Turkish Round)
  • 21.06.2013 - Antiknight
  • 22.06.2013 - Notwo Sudoku
  • 23.06.2013 - Diagonal Odd Sudoku
  • 24.06.2013 - Jigsaw Sudoku (practice on WPF Sudoku Grand Prix — Italian Round)
  • 25.06.2013 - Killer Sudoku (practice on WPF Sudoku Grand Prix — Italian Round)
  • 26.06.2013 - Coast to Coast sudoku (practice on WPF Sudoku Grand Prix — Italian Round)
  • 27.06.2013 - The Big Bang Theory Sudoku (practice on WPF Sudoku Grand Prix — Italian Round)
  • 28.06.2013 - 1011 Sudoku (practice on WPF Sudoku Grand Prix — Italian Round)
  • 29.06.2013 - Kropki (practice on WPF Sudoku Grand Prix — Italian Round)
  • 30.06.2013 - Diagonal Sudoku
  • 01.07.2013 - Sum Sudoku
  • 02.07.2013 - Little Killer
  • 03.07.2013 - Untouchable
  • 04.07.2013 - Arrow Sudoku
  • 05.07.2013 - Sudoku Extraregions
  • 06.07.2013 - Antidiagonal Sudoku
  • 07.07.2013 - Coded Pair
  • 08.07.2013 - Diagonal Sudoku
  • 09.07.2013 - Antiknight
  • 10.07.2013 - Non-consecutive Sudoku
  • 11.07.2013 - Killer Sudoku
  • 12.07.2013 - No four in a grow Sudoku
  • 13.07.2013 - Quadruple
  • 14.07.2013 - Thermo Sudoku
  • 15.07.2013 - Diagonal Sudoku
  • 16.07.2013 - Kropki (the competition variant was prepared by player Black Tiger)
  • 17.07.2013 - Non-consecutive Sudoku (to fullfill karzym's wish)
  • 18.07.2013 - 4 as the Basic Operations (the competition variant was prepared by player Mahyar)
  • 19.07.2013 - Bent Diagonal (to fullfill sudophile's wish)
  • 20.07.2013 - Jigsaw Sudoku
  • 21.07.2013 - Greater Than
  • 22.07.2013 - Palindrome Sudoku (the competition variant was prepared by player Black Tiger)
  • 23.07.2013 - Diagonal Sudoku
  • 24.07.2013 - Classic & Jigsaw Sudoku (the competition variant was prepared by player Mahyar)
  • 25.07.2013 - Windoku
  • 26.07.2013 - Killer Sudoku (to fullfill karzym's wish)
  • 27.07.2013 - Coast to Coast sudoku (to fullfill Black Tiger's wish)
  • 28.07.2013 - Even Sudoku
  • 29.07.2013 - Notwo Sudoku
  • 30.07.2013 - Diagonal Sudoku
  • 31.07.2013 - Odd Sudoku
  • 01.08.2013 - Antiknight
  • 02.08.2013 - XV Sudoku
  • 03.08.2013 - Diagonal Sudoku
  • 04.08.2013 - Even Sudoku
  • 05.08.2013 - Windoku
  • 06.08.2013 - Diagonal Sudoku
  • 07.08.2013 - Sudoku Extraregions
  • 08.08.2013 - Little Killer
  • 09.08.2013 - Antidiagonal Sudoku (to fullfill karzym's wish)
  • 10.08.2013 - Odd Sudoku
  • 11.08.2013 - Consecutive Sudoku
  • 12.08.2013 - Non-consecutive Sudoku
  • 13.08.2013 - Diagonal Sudoku
  • 14.08.2013 - Greater Than
  • 15.08.2013 - Twin Detector Sudoku
  • 16.08.2013 - Killer Sudoku
  • 17.08.2013 - Even Sudoku
  • 18.08.2013 - Outside Sums
  • 19.08.2013 - Jigsaw Sudoku
  • 20.08.2013 - Diagonal Sudoku
  • 21.08.2013 - Quadruple
  • 22.08.2013 - Sudoku Extraregions
  • 23.08.2013 - Skyscrapers
  • 24.08.2013 - Odd Sudoku
  • 25.08.2013 - Fortress Sudoku
  • 26.08.2013 - Non-consecutive Sudoku
  • 27.08.2013 - Diagonal Sudoku
  • 28.08.2013 - Even Sudoku
  • 29.08.2013 - Little Killer
  • 30.08.2013 - Diagonal Sudoku
  • 31.08.2013 - Odd Sudoku
  • 01.09.2013 - XV Sudoku
  • 02.09.2013 - Diagonally Non-consecutive Sudoku
  • 03.09.2013 - Diagonal Sudoku
  • 04.09.2013 - Even Sudoku
  • 05.09.2013 - Disjoint Groups
  • 06.09.2013 - Thermo Sudoku (the competition variant was prepared by player KrtekHonza)
  • 07.09.2013 - Odd Sudoku
  • 08.09.2013 - Diagonal Sudoku
  • 09.09.2013 - Diagonal Sudoku
  • 10.09.2013 - Non-consecutive Sudoku
  • 11.09.2013 - Alternative Sudoku
  • 12.09.2013 - Mathdoku
  • 13.09.2013 - No Four in a Grow Sudoku
  • 14.09.2013 - Sudoku Pairs
  • 15.09.2013 - Odd Lab
  • 16.09.2013 - Antiknight (practice on SC10)
  • 17.09.2013 - Disjoint Groups (practice on SC10)
  • 18.09.2013 - Palindrome Sudoku (practice on SC10)
  • 19.09.2013 - Killer Sudoku (practice on SC10)
  • 20.09.2013 - Quadruple (practice on SC10)
  • 21.09.2013 - Diagonal Sudoku
  • 22.09.2013 - Even Sudoku
  • 23.09.2013 - Diagonal Odd Sudoku
  • 24.09.2013 - Diagonal Sudoku
  • 25.09.2013 - Non-consecutive Sudoku
  • 26.09.2013 - Jigsaw Sudoku
  • 27.09.2013 - Pairs
  • 28.09.2013 - Queens
  • 29.09.2013 - Coded Pair
  • 30.09.2013 - Diagonal Sudoku
  • 01.10.2013 - Gappy Consecutive Sudoku (practice on WPF GP finals)
  • 02.10.2013 - Point To Next (practice on WPF GP finals)
  • 03.10.2013 - Arrow Sudoku (practice on WPF GP finals)
  • 04.10.2013 - Tennis Sudoku (practice on WPF GP finals)
  • 05.10.2013 - Sudoku Extraregions (practice on WPF GP finals)
  • 06.10.2013 - Even/Odd Sudoku (practice on WPF GP finals)
  • 07.10.2013 - Odd Lab (practice on WPF GP finals)
  • 08.10.2013 - Coast to Coast sudoku (practice on WPF GP finals)
  • 09.10.2013 - Diagonal Sudoku
  • 10.10.2013 - Windoku
  • 11.10.2013 - Outside Sums
  • 12.10.2013 - Disjoint Groups
  • 13.10.2013 - Odd Sudoku
  • 14.10.2013 - Antiknight
  • 15.10.2013 - Diagonal Sudoku
  • 16.10.2013 - Twin Detector Sudoku
  • 17.10.2013 - Jigsaw Sudoku
  • 18.10.2013 - Top Heavy Sudoku (to fullfill sudophile's wish)
  • 19.10.2013 - Untouchable
  • 20.10.2013 - Even Sudoku
  • 21.10.2013 - Diagonal Sudoku
  • 22.10.2013 - Windoku
  • 23.10.2013 - No Four in a Grow Sudoku
  • 24.10.2013 - Killer Sudoku
  • 25.10.2013 - Greater Than
  • 26.10.2013 - Odd Sudoku
  • 27.10.2013 - Fortress Sudoku
  • 28.10.2013 - Non-consecutive Sudoku
  • 29.10.2013 - Diagonal Sudoku
  • 30.10.2013 - Disjoint Groups
  • 31.10.2013 - X-Sums Sudoku
  • 01.11.2013 - Classic & Jigsaw Sudoku
  • 02.11.2013 - Sudoku Extraregions
  • 03.11.2013 - Even Sudoku
  • 04.11.2013 - Little Killer
  • 05.11.2013 - Diagonal Sudoku
  • 06.11.2013 - XV Sudoku
  • 07.11.2013 - Untouchable
  • 08.11.2013 - Outside Sums
  • 09.11.2013 - Notwo Sudoku
  • 10.11.2013 - Odd Sudoku
  • 11.11.2013 - Jigsaw Sudoku
  • 12.11.2013 - Diagonal Sudoku (the competition variant was prepared by player TiiT)
  • 13.11.2013 - Even Sudoku
  • 14.11.2013 - Killer Sudoku
  • 15.11.2013 - Diagonal Sudoku
  • 16.11.2013 - Non-consecutive Sudoku
  • 17.11.2013 - Twin Detector Sudoku
  • 18.11.2013 - Odd Sudoku
  • 19.11.2013 - Diagonal Sudoku
  • 20.11.2013 - Arrow Sudoku
  • 21.11.2013 - Diagonal Sudoku
  • 22.11.2013 - Odd Lab
  • 23.11.2013 - Quadruple
  • 24.11.2013 - Even Sudoku
  • 25.11.2013 - Little Killer
  • 26.11.2013 - Diagonal Sudoku
  • 27.11.2013 - Antiknight
  • 28.11.2013 - Windoku
  • 29.11.2013 - Queens
  • 30.11.2013 - Palindrome Sudoku
  • 01.12.2013 - Odd Sudoku