Doing Puzzles and I don't understand a solution. Why couldn't black king just take on b7?

While black is somewhat winning with other moves, can you find the only move that truly solidifies a completely winning endgame for black?

Trouble understanding chess books

I understand chess notations but what is this? Why are the moves separated in 4 columns and why does it only have white moves? (Book : Pocket encyclopaedia of chess openings - Jon Speelman)

My first brilliant and it was intentional!

First intentional brilliant, white took the bait

I just got an estimated 1200 rating in a game

I’m 600 How accurate are these? Of course it’s just one game, but I was very surprised to see this.

Made my first brilliant move!

What's wrong with Qxh1 here?

I played Nc3 before seeing Qxh1 then went into panick mode, but my opponent played Qd8, and apparently Qxh1 isn't a thing. But I can't see how to punish it.

Do you see why this move is so destructive for black?

Why is this a bad move?

It says i missed a fork but i created one

I believe this is what you call, a Smothered Mate