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 | William Bosi, 25 years old |
 Man  United Kingdom | |
 Born on december 27th 1998 | |
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| > Top boulder history | ||||
| Dates | Grades | Route | Rock climbing area | Country |
| nov 2nd 2022 | 9a | Alphane | Chironico | Switzerland |
| april 14th 2023 | 9a | Burden of Dreams | Lappnor | Finland |
| feb 20th 2024 | V17 (9a) | Return of the Sleepwalker | Black Velvet Canyon | United States |
| oct 19th 2024 | 9a | Spots of Time | Helvellyn | United Kingdom |
| Dates | Grades | Route | Rock climbing area | Country |
| sept 27th 2018 | 8c | Practice of the Wild | Magic Wood | Switzerland |
| oct 20th 2021 | 8c | Foundation's Edge | Fionnay | Switzerland |
| march 27th 2022 | 8c | Drift | Moravský kras (Holštejn) | Czech Republic |
| april 4th 2022 | 8c | Pata ledovce | Moravský kras (Holštejn) | Czech Republic |
| april 7th 2022 | 8c | Bulbasaur | Sklapsko | Czech Republic |
| april 9th 2022 | 8c | Ghost Rider | Moravský kras (Sloup) | Czech Republic |
| april 11th 2022 | 8c | Tekuté Štěstí | Moravský kras (Sloup) | Czech Republic |
| april 12th 2022 | 8c | Iceberg | Moravský kras (Holštejn) | Czech Republic |
| june 7th 2022 | 8c | Silent Singer | The Bowderstone | United Kingdom |
| june 10th 2022 | 8c | Trance | Badger cove | United Kingdom |
| june 13th 2022 | 8c | Outliers | Trowbarrow | United Kingdom |
| july 15th 2022 | 8c | Beautiful Mind | Badger cove | United Kingdom |
| nov 9th 2022 | 8c | Forgotten Gem | Chironico | Switzerland |
| dec 8th 2022 | 8c | Dreamtime | Cresciano | Switzerland |
| aug 12th 2022 | 8c+ | Honey Badger | Badger cove | United Kingdom |
| nov 11th 2022 | 8c+ | Ephyra | Chironico | Switzerland |
| may 22nd 2023 | 8c+ | Isles of Wonder SS | Ogwen valley (Carreg Mianog Boulders) | United Kingdom |
| nov 2nd 2022 | 9a | Alphane | Chironico | Switzerland |
| april 14th 2023 | 9a | Burden of Dreams | Lappnor | Finland |
| feb 20th 2024 | V17 (9a) | Return of the Sleepwalker | Black Velvet Canyon | United States |
| oct 19th 2024 | 9a | Spots of Time | Helvellyn | United Kingdom |
| > Top red point routes history | ||||
| Dates | Grades | Route | Rock climbing area | Country |
| march 9th 2021 | 9b/9b+ | King Capella | Siurana | Spain |
| > Extrem routes sends (french 9a/+ & +) | ||||
| Dates | Grades | Route | Rock climbing area | Country |
| nov 2nd 2021 | 9a/9a+ | Mutation | Raven Tor | United Kingdom |
| feb 5th 2020 | 9a+ | La Capella | Siurana | Spain |
| feb 4th 2021 | 9a+ | Furia de Jalabi | Siurana | Spain |
| feb 24th 2021 | 9a+ | First Ley | Margalef (El Laboratori) | Spain |
| nov 8th 2021 | 9a+ | Brandenburg Gate | Raven Tor | United Kingdom |
| july 4th 2022 | 9a+ | Free at Last | Dumbarton | United Kingdom |
| march 9th 2021 | 9b/9b+ | King Capella | Siurana | Spain |
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