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| Bidder | Amount | Date |
|---|---|---|
| R****r 84 | USD 174.00 | 09/20/2020 05:52:11 |
| P****i 113 | USD 164.00 | 09/20/2020 05:52:11 |
| P****i 113 | USD 162.00 | 09/20/2020 04:46:17 |
| R****r 84 | USD 152.00 | 09/20/2020 04:46:17 |
| R****r 84 | USD 139.00 | 09/20/2020 04:18:22 |
| P****i 113 | USD 129.00 | 09/20/2020 04:18:22 |
| R****r 84 | USD 101.00 | 09/19/2020 09:20:48 |
| L****r 42 | USD 96.00 | 09/19/2020 09:20:48 |
| R****r 84 | USD 87.00 | 09/18/2020 16:19:04 |
| L****r 42 | USD 82.00 | 09/17/2020 14:04:26 |
| R****r 84 | USD 78.00 | 09/17/2020 14:04:26 |
| R****r 84 | USD 76.00 | 09/17/2020 14:03:52 |
| L****r 42 | USD 71.00 | 09/17/2020 14:03:52 |
| R****r 84 | USD 50.00 | 09/13/2020 14:51:04 |
For most burr shapes, such as the 6-piece burr, if you have no internal holes, then the first piece that moves will come out all the way. This is because the burr shape is 'rectilinearly convex'. This is not true for the standard 24-piece burr shape. I decided to design a 24-piece burr in which:
1) there are no internal holes
2) the pieces are all notchable
3) many moves are required to remove the first piece
Here is the result of several weeks of design effort, using computer programs to assist in the process. It takes 7 moves to remove the first piece.
The construction of this puzzle is very good, with an excellent fit, not too loose, not too tight. Of course the pieces are precision milled from solid sticks.