Search tips: Space will search X or Y, "+" will search X and Y, "-" will exclude that term from search.
            27.94%  of auctions linked
        
        
            Search tips
            
  
    
  
        
    
    
     Using a space will search X or Y.
"+" will search X and Y.
"-" will exclude that term from search.
            27.94% 
            linked
        "+" will search X and Y.
"-" will exclude that term from search.
            Updated Nov 01, 2025
            
  
    
  
    
    
    
     Values for auctions have been converted to USD using conversion rates from the actual date of the auction.
  
        | Puzzle 
                    
  
    
   
    
    
     Click the  to link 
                an auction to a puzzle.  | 
                |||||
|---|---|---|---|---|---|
| 
                        
  
    
   
    
    
     Click the  to link 
                    an auction to a puzzle.  | 
                |||||
| “The Prague Czecherboard” (Exchange Puzzle IPP 28) | 2023-Sep-22 | $20.00 | 1 | 
                        
  
    
   | 
                    |
| 
                         “The Prague Czecherboard” (Exchange Puzzle IPP 28) 
                        
                     | 
                    Sep 22 2023  | 
                    
                         $20.00 
                        1 bids 
                     | 
                    |||
| The Prague Czecherboard | 2012-Feb-11 | $27.00 | 3 | 
                        
  
    
   | 
                    |
| 
                         The Prague Czecherboard 
                        
                     | 
                    Feb 11 2012  | 
                    
                         $27.00 
                        3 bids 
                     | 
                    |||
| The Prague Czecherboard | 2009-Feb-14 | $30.00 | 7 | 
                        
  
    
   | 
                    |
| 
                         The Prague Czecherboard 
                        
                     | 
                    Feb 14 2009  | 
                    
                         $30.00 
                        7 bids 
                     | 
                    
                   Auction: 
                   
                   
                
                Search here for a puzzle...