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White to move and mate in two #719 - IBM RAMAC 350, the world's first Disk Drive [1]

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Date: 2025-09-16

The mighty hard disk drive made its commercial debut on September 13, 1956. It was a revolutionary behemoth.

The IBM RAMAC 350 storage unit:

The IBM 305 system with RAMAC 350 disk storage leased for US$3,200 (equivalent to $35,800 in 2024) per month.

Here is a pic of the disk drive, its read-write head actuator assembly and the 50-disk stack.

We’ve come a long way since then —

WD 5 Terabyte Elements Portable External Hard Drive, price ~$130. www.amazon.com/...

Now, let’s solve today’s puzzle composed in 1889 by noted American chess composer William Meredith (1835-1903). 100 of his puzzles are featured in the book “100 Chess Problems”, each with commentary by a different problemist.

P.S.

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