This project's documentation includes a list of winning solutions for machine learning competitions which used LightGBM.

https://github.com/microsoft/LightGBM/tree/master/examples#machine-learning-challenge-winning-solutions

With one exception (), this has not been updated since December 2019.

How to close this issue

Look through "completed" competitions (from December 2019 to now)

Problem:
catboost version: 0.23.2
Operating System: all
Tutorial: https://github.com/catboost/tutorials/blob/master/custom_loss/custom_metric_tutorial.md

Impossible to use custom metric (С++).

Code example

from catboost import CatBoost
train_data = [[1, 4, 5, 6],