A 1995 Pentium running modern Stockfish would beat Kasparov: software worth 720 Elo
demian_ai · x · 2026-11-04
Nicholas Carlini ported Stockfish to a used 1995-era Pentium Pro (200MHz, 64MB RAM, booting off a floppy) and tuned it for the old chip.
The result: the 30-year-old desktop plays at an estimated 3300 Elo, while Kasparov was just under 2800 — the old machine would be the clear favorite. In a head-to-head between eras (old chip + modern Stockfish vs modern Ryzen + 1996 engine), the Pentium side won 78, drew 17, lost 5.
Chess engines have gained 1335 Elo since 1996, and roughly 720 of that came from better software, not faster chips, driven by two ideas:
- Smarter search: the engine prunes probably-bad moves early, so the same chip spends time on lines worth reading
- NNUE: a small neural net that scores positions fast on a plain CPU, far better than hand-written rules
The takeaway: every chip already sitting in a data center keeps getting stronger as software improves.
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