David Stolp

December 2009 (Contest XI)

The N Queens Puzzle Revisited, Effective Sets, Palindromic Numbers, Maze of Digits, Plant Location, Park tour

January 2010 (Contest XII)

Lost Primes, Jawbreaker, Wildcard Matching, Cell Phone Towers , Circle of towers, Place the balloon

February 2010 Contest

Toll Trolls, The Mine Field, Motorbike Racing, Soccer League, Sorting device, Overlapping discs

March 2010 Contest

Heroes of Magical Might, Traffic jam, Tri-Hexagonal Puzzle, K-important Strings, Treasure Hunting, The Best Tower

April 2010 Contest

Lighting the shop, The Reversed World, Flood, Travelling Salesman Again !, Trip, Adding Fractions

May 2010 Contest

Rotation Puzzle, Summing Slopes, Generalized Spanning Trees, Rendezvous, Nice Quadrangles, Lights Out

January 2011 Challenge

Chef attic window, Count Relations, Splitting Giant Subs, Chess Pushing Game, Restaurant Expansion, Flu Shot Lineup

The January 2011 Cook-Off

Holes in the text, Chef team, Whole submatrix, Time of collisions

February 2011 Contest

Rush Hour, Coloring Colorable Graphs, Counting Terms, Milestones, Glass Measurement, Bogosort

March Cook-off Challenge

Money Transformation, Snake Snaky, Grouping Chefs

April Long Contest

Rectangles Counting, Central Point, Graphs in Euclidean Space, Number Game Revisited, Gravel, Generalized Independent Sets

June Cook-off

Longest Arithmetic Progressions, Correctness of Knight Move, Super-plane

August Long Contest 2011

Coloring in Hypercube, Infinite Grid Game, Block Drop, Complex Spanning Tree

August Cook-off 2011

Rotate the String, Collect the Chocolate Chips, Angry Chef - Crispy Chips, Open the Dragon Scroll, Vote for the Noodle Soup

November Long Contest 2011

Colored Domino Tilings and Cuts, Chefs new Pet, New Restaurant, The Postal Service, Stepping Average, Lucky Days

November Cook-Off

Colorful Chain, Moving Coins, Subanagrams

Problems Authored (1)

Problems Tested (58)

Editorials Contributed (0)

No Contribution