Players, remember: the Witch has no capturing ability. As such, she cannot perform check.
28.We6 is simply moving White's Witch to be adjacent to Black's King, while Black's King remains unthreatened.
Micro Dog #8 Final (alexandermatos - yujieli)
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28. … Rxa3
Jan 22, 2021
0
#104
01. e2-4 01... e7-5
02. d2-4 02... Nh8-g6
03. Nc1-d3 03... f7-6
04. Nh1-g3 04... d7-5
05. exd5 05... Bg8xd5
06. d4xe5 06... f6xe5
07. Nd3xe5 07... Qf8-e7
08. e5-d3 08... Qe8x1+
09. Nd3xe1 09... Ng6-f4
10. Wb1-c3 10... Bd8-f6
11. Wc-e3 11... Bf6xb2
12. Ra-b1 12... Bb2-f6
13. Bd1-g4 13... Nc8-d6
14. Bg1-c5 14... Nd6-c4
15. Rb-d1 15... Nc4-b2
16. Rd-b1 16... Bd5xa2
17. Rb-a1 17... Ba2-c4+
18. Bg4-e2 18... Nf4xe2
19. Nfcxe2 19... b7-6
20. Bc5-a3 20... Nb2-a4
21. Ra-d1 21... Na4-c3
22. Rd1-2 22... Gb8-7
23. Ne1-d3 23... Nc3xe2
24. Rd-e2+ 24... Ke8-f7
25. h2-3 25... Ra-d8
26. Gi1-h2 26... Bc4xd3
27. c2xd3 27... Rd8x3
28. We3-6 28... Rdxa3
Click here for Yujieli's view as Black
Time warning
I claim win by timeout
Jan 27, 2021
0
#107
Black won by insufficient time.
Click here for Yujieli's view as Black.
A pleasant game from both Yujieli and AlexanderMatos. Congratulations to both of you.
Jan 28, 2021
0
#108
Now that the match is over, I wanted to discuss the following.
Yujieli, I want to commend you for a strong positional set up throughout much of the match.
However, I couldn't help but wonder. When your opponent moved 20.Ba3,
Click here for AlexanderMatos's view as White
You responded with 20...Na4. I was a bit discouraged when you didn't instead perform 20...Bxe2+; because that would have lead to a very powerful position for you! Take a look.
Click here for AlexanderMatos's view as White
White would have then had to respond by recapturing your Bishop with his/her King (The other possible move is to move his/her King to g2, but that would give you a captured Knight for free),
Click here for AlexanderMatos's view as White
which, in turn, would have cause you to be able to perform 21...Nc4(!). 
Click here for AlexanderMatos's view as White
As you can see from the diagram, 21...Nc4 has a huge benefit: it performs a discovery threat on White's a1 Rook, while your Knight itself performs a double threat by forking White's Bishop and Witch. Three of White's pieces are under fire at once. Ultimately, White will have to either lose a Rook or a Witch!
At the same time, the previous move that checked White's King will force the King to have to move out, depriving White of his/her ability to perform Castling.
~~~
With the most humble respect, I wanted to know: what caused you to not do this ^^^? Did you simply miss it, or did you see it and considered a different move that you thought might have been better?
oh that position, I overthought of that since that was my initial plan.
I think the reason is that he can play Ra2 and I don't really see myself trading a knight for a witch since I like the position of my knight and his witch is not really a problem for me
but the move I made was really questionable since I agree with the point of removing his king's castling ability and I can keep my knight there without taking anything when he plays Ra2.
I think with the position you shown, I could have been better. Still, good game for both of us, feel sadden that he hang his bishop since I feel like the game could have gone longer
Jan 29, 2021
0
#111
Yes, you don't need to take anything. The benefit of manipulating White's Rook to move to a2 would restrict the Rook's maneuverability; taking even more away from what lesser position White already suffered here.
I can treat this as a nice learning experience for just my 3rd game
Jan 29, 2021
0
#113
I like your positive attitude.
At any rate, both of you did nicely, and I'm proud to have hosted this game for you.
You (Yujieli) were about 1 or 2 steps ahead of your opponent with agressive position.
My one loose advice: try to draw the big Hand out and use her more actively. If you observed my game with AlexanderMatos in the first round, I was wild with that hand! She flew all over the board, causing my Knight, Rook and Queen to jump over to and evade positions; even helped performed a strange perpetual check that I wouldn't otherwise be able to do in "regular" non-variant FIDE chess. 
We6+