# Experimental higher-fidelity C31 in 10.5 GB

**URL:** <https://forum.grin.mw/t/experimental-higher-fidelity-c31-in-10-5-gb/3211>\
**Category:** Mining\
**Created:** [January 25, 2019, 12:13pm UTC](https://forum.grin.mw/t/experimental-higher-fidelity-c31-in-10-5-gb/3211 "2019-01-25T12:13:59Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![tromp](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/tromp/32/22_2.png) [@tromp](https://forum.grin.mw/u/tromp)\
**Post date:** [January 29, 2019, 8:14pm UTC](https://forum.grin.mw/t/experimental-higher-fidelity-c31-in-10-5-gb/3211/17 "2019-01-29T20:14:16Z")

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Ok, think I have most if not all bugs fixed now.  
Please try latest memred2 commit, and let me know if you still see problems, or if it works for you. Even better if you can give fidelity stats…

NOTE: there is now an option to set expand to 3,  
which is the default for 30+  
This means that when trying the new solver within grin-miner, you need to avoid setting expand=2

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