No, 5...Qd7 isn't a mouse slip. GM has previously tried 5...Qd7 against Evgeniy Najer [FIDE World Cup 2017] and [ 2014].

"Richard's moves are hard to predict" -

https://t.co/xv3zaIDImw

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2019 Grand Chess Tour Finals
MVL 🇫🇷 vs Ding Liren 🇨🇳

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