Dear USPEXers, We are releasing version 10.2 of USPEX. This is a very major upgrade, with many new features, improved robustness, and all known bugs fixed. We have removed the condition that users cannot participate in the development of competing codes, and warmly invite everyone to use USPEX under conditions specified on our website (uspex-team.org).

**No more dependence on Matlab:**USPEX now is distributed as a compiled code, the use of which does not require any commercial products such as Matlab.**List of new features:**- Implementation of random topological structure generator (Bushlanov, Blatov, Oganov, 2019), which greatly speeds up the calculations.
- Magnetic optimization. Available for clusters and crystals. This allows one to predict magnetic states of materials.
- Now fitnesses can be minimized or maximized (min_ or max_), and mathematical expressions can be mini/maximized.
- Pareto optimization, enabling simultaneous optimization of two or more properties (Allahyari & Oganov, 2018). optType is now a keyblock, not a keyword.
- Implementation of optimization of thermoelectric figure of merit (ZT), which is computed using BoltzTraP (Nunez-Valdez et al, 2018).
- Implementation of optimization of birefringence and fracture toughness (Niu, Niu, Oganov, 2019).
- Interface with Gaussian, MOPAC, DFTB, ORCA, FHI-aims, ABINIT.
- Use of plane groups for generating structures of 2D-crystals.
- Variable-composition prediction of 2D-crystals (following Revard et al., 2016).
- For surfaces, non-integer reconstructions (such as sqrt(2)xsqrt(2)) are enabled.
- For surfaces, the code now outputs the phase diagram.
- Symmetry determination is now done using SPGLIB. Symmetrization can also be optionally performed during calculation of physical properties, making it more robust.
- Added utility “pmpaths” based on the method of Stevanovic et al. (2018), allowing prediction of the likeliest phase transition mechanisms. This will only give a rough approximation, which you need to refine using VCNEB method implemented in USPEX (pmpaths gives files that can be directly read by VCNEB@USPEX).
- VCNEB module of USPEX has been improved and now converges a few times faster. Bug fix: structure generation for quaternary systems in varcomp didn’t work before, now is fixed. Various other bugs fixed. Version 10.2 has no known bugs.

**Changes in input:**- Keyword gap -> bandgap.
- Change of specification of fitness (optType is now a keyblock, not a keyword).
- For calculations of physical properties symmetrization of the structure can now be performed – for this, use parentheses “()” to specify stages of calculation where symmetrized structure will be used.

**New mode of distribution:**Now USPEX is distributed as a compiled code. This makes the code easier to install, and removes the need to have Matlab or any other commercial software.**Documentation:**- New website
- USPEX Manual has been updated to describe all changes and new features. Both English and Chinese versions are available.
- USPEX distribution now includes a number of MOL-files as examples.
- Improved many examples (especially Example13).
- Rerun all examples with the new code. Added many new examples. Now we have 34 examples of different types of calculations, and new examples include:
- two examples with Quantum Espresso.
- surface structure prediction for MgO.
- examples of calculations with FHI-aims, DFTB, MOPAC, Gaussian.
- Pareto optimization of thermoelectric figure of merit (ZT) and enthalpy.
- single-block (=fixed stoichiometry, but variable total number of formula units) optimization of the band gap for Si.
- magnetic structure prediction with USPEX.
- example of a TPS calculation.
- variable-composition prediction of stable 2D-compounds of Sn and S.
- variable-composition prediction of surface oxidation of Pd.

**References:**- Allahyari Z., Oganov A.R. (2019). Multi-objective optimization as a tool for materials design. In:.Handbook of Materials Modeling (ed. W. Andreoni, S. Yip). Volume 2 Applications: Current and Emerging Materials. Springer Verlag.
- Bushlanov P.V., Blatov V.A., Oganov A.R. (2019). Topology-based crystal structure generator. Comp. Phys. Comm. 236, 1-7.
- Núñez-Valdez M., Allahyari Z., Fan T., Oganov A.R. (2018). Efficient technique for computational design of thermoelectric materials. Comp. Phys. Comm. 222, 152-157.
- Niu H.Y., Niu S.W., Oganov A.R. (2019). Simple and accurate model of fracture toughness of solids. J. Appl. Phys., in press.