Short answers, pulled from the story.
Article 93 of the Russian Constitution requires specific steps including State Duma indictment and mandatory Supreme Court opinions before any vote takes place. The process mandates Constitutional Court assessment and a two-thirds majority in both chambers to succeed.
The State Duma needs 300 affirmative votes out of 689 deputies to indict, while the Federation Council requires 114 votes to finalize removal. Both chambers must achieve a two-thirds majority to proceed with removing the president from office.
On the 28th of March 1993, deputies voted against removing President Boris Yeltsin from power. Only 617 out of 689 possible votes were cast for impeachment, failing to reach the required majority during this first attempt.
All three historical attempts to impeach a Russian president have failed completely because no other individual has faced formal proceedings under Article 93 since its adoption. The State Duma never achieved the necessary 300 votes in any case, preventing judicial review or final action by the Federation Council.
Between May 11 and the 15th of May 1999, deputies accused President Yeltsin of causing the collapse of the Soviet Union, committing war crimes in Chechnya, and weakening national defense capabilities. Some lawmakers argued his actions amounted to genocide against the Russian people, but none received the required 300 votes needed for indictment.