Saving a lost game is lesson 2 of 3 in Stalemate and other draws, a basics course suited to players rated around 600 (beginners). When you are losing, stalemate is your friend. If your king has no moves, try to get rid of your last pieces. It has 1 interactive exercise: 1 find-the-move puzzle. You play every move on a board and get feedback straight away. The lesson is free.
What this lesson explains
You are far behind, and Black threatens checkmate on e1. But look at your king. It cannot move, and your h-pawn is blocked. If your queen disappeared, you would have no legal move at all. That would be stalemate.
What you practise
Use it. Give check with your queen. If Black takes her, it is stalemate. If not, you keep checking.
Worked examples
Use it. Give check with your queen. If Black takes her, it is stalemate. If not, you keep checking. Saved. If the king takes your queen, you have no move, and it is stalemate. Black cannot escape the checks without taking her.
chessGM