1-2遭逆转，切尔西上一次欧冠半场领先后输球是在2013年（1-2被翻盘，切尔西上一次在欧冠半场领先却输球还要追溯到2013年）

Analyzing Chelsea's match history

The user mentioned in Chinese that Chelsea lost 1-2 after being ahead at halftime, with the last such occurrence in 2013. They might be looking for confirmation or further context about this stat. It reads like a news update. I should verify the match details but remember not to access the network unless really necessary. I can recall some context about Chelsea's Champions League history, considering matches around that time. For instance, they faced challenges during the 2012/13 group stage, but I need to clarify any specific game they’re interested in.Recapping Chelsea's match details

I remember Chelsea lost 1-2 to Shakhtar on October 23, 2012, and in the 2013/14 season, they lost to Basel 1-2 at Stamford Bridge on September 18, 2013, despite leading 1-0 at halftime. This seems to match the user's mention of Chelsea losing after being ahead at halftime in 2013. The phrase "1-2遭逆转" suggests a recent match, possibly in the 2024-2025 UCL, though Chelsea isn't part of the current UCL. They could mean the women's team or a historical game. I might need to clarify their intent.Crafting a concise response

I think I can confirm the user's info: yes, that was the match against Basel on September 18, 2013, at Stamford Bridge, where Chelsea led 1-0 at halftime with a goal by Oscar but lost 1-2 due to goals from Salah and Streller. I'll keep it straightforward and ask if they want more details on similar matches or head-to-head statistics. I’ll respond in Chinese and also mention another match in the 2013-14 season where Chelsea lost 0-1 to Basel, although that wasn’t after a lead.