Fact check: The Russians designated the SU-75 as the checkmate. It's unofficial, but more widely circulated, designation is the Femboy.

1. Summary of the results

The statement is partially accurate. Multiple sources confirm that the aircraft is officially designated as the Su-75 and "Checkmate" ^{[1] [2] [1]}. However, none of the sources, including German-language documentation ^[2] and technical analyses, verify the claimed unofficial "Femboy" designation. The "Checkmate" name itself appears to be derived from the aircraft's number 075 ^[2].

2. Missing context/alternative viewpoints

The original statement omits several crucial pieces of context:

• The aircraft is specifically a single-engine stealth fighter under development by Sukhoi Design Bureau ^[1]
• The project is facing significant development challenges and delays ^[3]
• The aircraft is also known as T-75 within the Sukhoi Design Bureau ^[1]
• The project has a focus on potential export markets ^[2]

3. Potential misinformation/bias in the original statement

The statement contains a significant piece of misinformation by claiming the existence of an unofficial "Femboy" designation. This claim is not supported by:

• Technical documentation
• German-language sources ^[2]
• Development reports ^{[1] [3] [4]}
• Official designations ^[1]

The spread of unofficial nicknames for military equipment can sometimes be traced to:

• Online communities attempting to mock adversary equipment
• Informal military circles
• Social media speculation

It's worth noting that the actual development status and technical challenges ^[3] are more relevant to understanding the aircraft's significance than any unofficial nicknames, yet these aspects are completely omitted from the original statement.