Petr Klaban
| Challenge | Status | End | Votes | Entries | Players |
|---|---|---|---|---|---|
| Dominant Turquoise | closed | 5 years, 11 months ago | 8199999 | 12695 | 3380 |
| Wild Animal | closed | 5 years, 1 month ago | 17800000 | 42160 | 10757 |
| Parks And Gardens | closed | 4 years, 4 months ago | 7900000 | 21931 | 5490 |
| Wonderful Smell | closed | 3 years, 11 months ago | 12100000 | 29851 | 7438 |
| Natural Beauty | closed | 3 years, 9 months ago | 14400000 | 37644 | 9373 |
| Something Different | closed | 3 years, 7 months ago | 8300000 | 21289 | 5328 |
| Moments of Chaos | closed | 3 years, 2 months ago | 10700000 | 10155 | 5023 |
| Golden Ratio | closed | 2 years, 11 months ago | 11800000 | 27117 | 6745 |
| Colorful Buildings or Structures | closed | 2 years, 9 months ago | 9700000 | 8467 | 4189 |
| Sharp and Pointy | closed | 2 years, 3 months ago | 14100000 | 19217 | 6396 |
| Everyday Objects | closed | 2 years ago | 9500000 | 20562 | 5131 |
| On An Adventure | closed | 11 months, 1 week ago | 7562436 | 6167 | 3025 |
| Flight Or Flying | closed | 8 months, 3 weeks ago | 11863287 | 13245 | 4390 |
| Pure Classic | closed | 4 months, 1 week ago | 8237170 | 5960 | 2892 |