2021 - Position 143

XGID=-B-cBBCb---BbC-aa--bbb---A:1:-1:1:21:0:0:3:0:10

Unlimited Games. How should Red play 21?

It might seem right to hang back with bar/23, 6/5 but Red leads in the race and has the stronger home board. Both those facts indicate that Red should step up with bar/22 and challenge White now.

The rollouts strongly support this idea. Bar/23, 6/5 is a bad error but not quite a blunder.