STUPID TACTICS TRAINING

I found such a solution from the Chessbase's Playchess, Tactics Training: 1...Rg3+!!

White to move

Playchess's Tactics Training (similar to Chess24's, for example)—I seriously dislike such a fever.

They are trying to train you to be a superficial robot. 

Some stupid psychologists probably invented such a system.

Instead, I recommend using, for example, Chesstempo's tactics training. It trains you to calculate difficult, complicated positions and see nuances. 

On Chesstempo, you have to start by understanding the material balance of the position and its structure. It is important to know if you are a pawn down, etc., because the rightness of the solution depends on the final material balance.

I have received a rating above 2400 on such training systems. True, I often had to waste 30 minutes to find the right solution.

Let's return to Playchess's system. My tactics rating there is below 1800, and I will probably not use that system anymore.

Often, they give only 30 seconds to "solve" the problem.

Often, I have made the "right move" without having time to understand whether the final position's material balance and structure are good enough. After the "successful" solution, a new problem is immediately presented, while your brain is dissatisfied and still wondering whether the "right" solution was indeed right.

Often, I have lost time because I am still counting the dissipated pawns and exchanges.

Obviously, they are training you to be a blitz-idiot.

In a real game, the player remembers how many pawns and exchanges one has sacrificed!