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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/software/deduce-also-known-as-deduce-sa.md

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+---
+title: Deduce also known as Deduce-SA
+tags:
+- mind games
+years:
+- '1971'
+params:
+  specs:
+  - label: year of release
+    value: '1971'
+  - label: companies
+    value: RCA
+  - label: type
+    value: game
+  - label: media
+    value: tape
+  - label: systems
+    value: RCA Fred computers
+  - label: number of players
+    value: 1 player
+  - label: staff
+    value: Joseph Weisbecker (Programmer)
+  screenshots:
+  - title: you have 15 turns to guess the 4 digits chosen by the computer
+    subtitle: ''
+    text: ''
+    image: null
+  - title: 1 digit is in the right position and 3 are misplaced
+    subtitle: ''
+    text: ''
+    image: null
+  - title: again, 1 digit is in the right position and 3 are misplaced
+    subtitle: ''
+    text: ''
+    image: null
+  - title: Not turn left and the player has not guessed the four digits. Its a lost game.
+    subtitle: ''
+    text: ''
+    image: null
+  - title: Original note from the Fred documentation
+    subtitle: ''
+    text: ''
+    image: null
+  machines:
+  - /museum/rca-fred
+  company: /companies/rca
+  oc_id: 850
+  source:
+    url: https://web.archive.org/web/20230207050352/http://www.old-computers.com/museum/software_detail.asp?id=850
+    date: '2023-02-07'
+---
+
+This is one of the first games available for the Fred project, as the first version was programmed by Jospeh Weisbecker on the 7th december 1971.
+
+The first "Deduce" is not really a game but rather a demonstration of "artificial intelligence" of the computer. It works like this: the computer deduces which one of 8 front panel lights the player has chosen, simply by asking three questions. These questions are in fact a serie of 4 front panel lights lit, and the player must tell the computer if his chosen light is among the ones lit.
+
+There is no screen display involved in this version. Everything is happening on the front panel lights of the Fred computer.
+
+Sometimes later, surely after 1972 (as the famous board game Mastermind was released in 1971/1972), a second version was programmed for the Fred systems. This time it plays more like a Mastermind game where the player must guess 4 digits chosen by the computer within 15 rounds.
+
+Each time the player enter a serie of 4 digits, the computer will tell how many digits are are their right position, and how many digits are valid but misplaced.
+
+At the end of the 15 turns, if the player didn't succeed in finding the right 4 digits code, the computer will display LOSE.