4Stack #70 — answers & breakdown

Monday, September 21, 2026

The sixteen cards in this puzzle were: Commodore 64, ZX Spectrum, Amstrad CPC, BBC Micro, Amiga 500, Atari ST, Acorn Archimedes, Sharp X68000, MSX, PC-98, FM Towns, PC-88, Sound Blaster, Turbo button, 3dfx Voodoo, Config.sys.

The four stacks

8-bit home computers

Commodore 64, ZX Spectrum, Amstrad CPC, BBC Micro

16-bit home computers

Amiga 500, Atari ST, Acorn Archimedes, Sharp X68000

Japanese computer platforms

MSX, PC-98, FM Towns, PC-88

Early PC gaming staples

Sound Blaster, Turbo button, 3dfx Voodoo, Config.sys

Want to try it yourself? Play puzzle #70 — archive plays don't affect your streak. Or jump into today's puzzle.