Week 1

Three overlapping locations in Woodlands:

Two overlapping locations in Choa Chu Kang (redder point):

Three overlapping locations in Suntec City:

Three overlapping locations in Bedok:

Table of store locations

##  [1] "Challenger Bugis"            "Challenger Ang Mo Kio Hub"  
##  [3] "Challenger Nex"              "Challenger Vivocity"        
##  [5] "Challenger Jurong Point"     "Harvey Norman Millenia Walk"
##  [7] "Challenger Plaza Singapura"  "Challenger Great World City"
##  [9] "Courts Orchard"              "Newstead Suntec City"       
## [11] "Harvey Norman Suntec City"   "Challenger Suntec City"     
## [13] "Challenger Causeway Point"   "Popular Lot One"            
## [15] "Gain City Sungei Kadut"      "Popular Causeway Point"     
## [17] "Popular Tampines Mall"       "Challenger Tampines Mall"   
## [19] "Courts Causeway Point"       "Harvey Norman Bedok Point"  
## [21] "Challenger Bedok Point"      "Best Bedok Mall"            
## [23] "Challenger Lot One"

Week 2

Three overlapping locations in the West:

Two overlapping locations in the South:

Two overlapping locations in Hougang:

Two overlapping locations in Serangoon:

Two overlapping locations in Bugis:

Table of store locations

##  [1] "Challenger Bugis"             "Challenger Ang Mo Kio Hub"   
##  [3] "Challenger Nex"               "Challenger Vivocity"         
##  [5] "Challenger Jurong Point"      "Harvey Norman Millenia Walk" 
##  [7] "Harvey Norman Jurong Point"   "Challenger IMM"              
##  [9] "Challenger Jem"               "Courts Megastore"            
## [11] "Challenger Tiong Bahru Plaza" "Challenger Tampines One"     
## [13] "Harvey Norman Hougang Mall"   "Challenger Hougang Mall"     
## [15] "Popular Nex"                  "Challenger Sun Plaza"        
## [17] "Challenger Northpoint"        "Best Vivocity"               
## [19] "Digital Style Jurong Point"   "Challenger Bugis L3"