The image you've linked to represents the concept of Proof-of-Work in the Bitcoin blockchain. It's a visual metaphor for the computational work that miners do to secure and validate transactions on the network.
Plain language explanation:
Think of it as a big competition where every computer is solving complex puzzles. The more powerful your computer, the better chance you have at winning this race. Instead of just shouting out answers (which could be faked), each miner has to prove they did their homework, which takes real effort and can't be easily cheated.
When we talk about voting here, it's not like raising hands or casting ballots; it's about how much work each participant contributes to keep the system running smoothly and honestly—hence "one-CPU-one-vote."
So if someone tries being sneaky by acting like they're many voters with lots of fake IP addresses, proof-of-work stops them in their tracks because what really counts is how much genuine computing grunt you bring to the table.
This whole setup creates a sturdy chain (blockchain) because changing anything isn't just turning back time on one block—it means climbing an entire mountain range all over again while racing against everyone else who keeps moving forward. It gets tougher with every new block added, making it super hard for any bad actors to mess things up.
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