New problems

February 2017

prob075 : Product Matrix Travelling Salesman Problem

September 2016

prob061 : Resource-Constrained Project Scheduling Problem (RCPSP)

prob062 : Interview Assignment Problem

prob063 : Winner Determination Problem (Combinatorial Auction)

prob076 : Costas Arrays

December 2015

prob069 : Balanced Nursing Workload Problem

September 2015

prob053 : Graceful Graphs

prob059 : Energy-Cost Aware Scheduling

prob060 : Ridesharing

prob064 : Generalised Balanced Academic Curriculum Problem

prob065 : Optimal Financial Portfolio Design

prob066 : Distance-Based Constrained Clustering

prob067 : Quasigroup Completion

prob068 : Traveling Tournament Problem with Predefined Venues (TTPPV)

prob070 : Distributed Channel Assignment Problem

prob071 : Diameter and Degree Bounded Network Design Problem

prob072 : Target Tracking in Distributed Sensor Network

prob073 : Test Scheduling Problem

prob074 : Maximum Clique

prob110 : Peaceably Co-existing Armies of Queens

prob115 : Tail Assignment

prob116 : Vellino's Problem

prob131 : Production Line Sequencing

prob132 : A Layout Problem

prob133 : Knapsack Problem

June 2015

prob058 : Discrete Lot Sizing Problem

May 2014

prob006 : Golomb rulers

prob008 : Vessel Loading

prob009 : Perfect Square Placement

prob018 : Water Bucket Problem

prob019 : Magic Squares and Sequences

April 2014

prob007 : All-Interval Series

prob024 : Langford's number problem

prob043 : differential diagnosis

prob044 : Steiner triple systems

prob047 : Supply Chain Coordinations

March 2014

prob004 : Mystery Shopper

prob032 : Maximum density still life

prob033 : Word Design for DNA Computing on Surfaces

prob034 : Warehouse Location Problem

prob035 : Molnar's Problem

prob036 : Fixed Length Error Correcting Codes

prob037 : Peg Solitaire

prob039 : The Rehearsal Problem

prob040 : A Distribution Problem with Wagner-Whitin Costs

prob041 : The n-Fractions Puzzle

prob042 : diagnosis

prob045 : The Covering Array Problem

prob046 : Meeting Scheduling

prob048 : Minimum Energy Broadcast (MEB)

prob049 : Number Partitioning

prob051 : Tank Allocation

prob052 : Extremal Graphs with Small Girth

February 2014

prob020 : Darts Tournament

prob021 : Crossfigures

prob022 : Bus Driver Scheduling

prob023 : Magic Hexagon

prob025 : Lam's Problem

prob026 : Sports Tournament Scheduling

prob027 : Alien Tiles Problem

prob028 : Balanced Incomplete Block Designs

prob029 : Prime queen attacking problem

prob030 : Balanced Academic Curriculum Problem (BACP)

prob031 : Rack Configuration Problem

prob038 : Steel Mill Slab Design

prob050 : Diamond-free Degree Sequences

prob054 : N-Queens

prob055 : Equidistant Frequency Permutation Arrays

prob056 : Synchronous Optical Networking (SONET) Problem

prob057 : Killer Sudoku

November 2013

prob003 : Quasigroup Existence

prob010 : Social Golfers Problem

prob011 : ACC Basketball Schedule

prob012 : Nonogram

prob013 : Progressive Party Problem

prob014 : Solitaire Battleships

prob015 : Schur's Lemma

prob016 : Traffic Lights

prob017 : Ramsey Numbers

October 2013

prob002 : Template Design

prob005 : Low Autocorrelation Binary Sequences

September 2013

prob001 : Car Sequencing