Obviously NOT counting draws there are a lot eg Nepo lost 4-0 total to Magnus in the 2021 WCC so removing the draws, there's that.
In the 2019 WFRCC, which was indeed classical, Magnus Carlsen lost to Wesley So in 3 classical games in a row, COUNTING draws: Draw and then 3 losses (and then fast rapid which was draw and then 1 loss).
Did this ever happen in regular classical chess (that are 1v1 tournaments but including finals or tiebreakers of tournaments that aren't 1v1) - 3 losses in a row?
- 2006-2021 - None.
- FIDE: 1993-2004 - Oh just 2 Alexei Shirov vs Vishy Anand in 2000 but was it classical time controls? And there's Anatoly Karpov vs Gata Kamsky in 1993 - ok so WFRCC 2019 was the 1st time since either 2000 or 1993 that someone lost 3 classical games in a row in either WCC or WFRCC.
- Classical (PCA world championship i mean) : 1993-2004 - None.
And then before 1993...