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Interactive 2D Pebble Game
This interactive version of the 2D Pebble Game, developed by
Mykyta Chubynsky, should amuse you. It can handle tens of vertices
easily. There is a limit of 100 bonds and this has been designed
to be a learning tool. For larger systems, you should use the
FORTRAN version of the 2D Pebble Game [1, 2] that can be
downloaded.Here is how this applet works. Put the vertices of the graph and click the "Done" button. Add bonds, by clicking on its first endpoint (the site should turn red) and then on the second endpoint. After each new bond is entered, click the "Run" button (again, after every bond insertion!). The applet will try to free 4 pebbles at the ends of the newly entered "green" bond and if this succeeds, will then place one of the pebbles on the bond. If 4 pebbles cannot be freed, the bond is redundant and all bonds in the region of failed pebble search will turn red thus indicating that these bonds are stressed. At any point, the user can press the "Clear" button to clear all input and start from scratch. More details can be found here: 2D_pebble_game_applet_instr.pdf Interactive 2D Pebble Game Applet
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