unusual checkmates

Here I have a forced promotion for a knight
lichess.org/analyse/wdj8pmac/black

promoting to a knight in karifa's game is probably still faster

when promoting to a queen, the immediate mate threat on g1 can be prevented with Qf1, Kf4, etc.

still wins easily of course

i got a chess problem for you guys

lichess.org/analyse/d35q1ca2/black

after 22.Qg2 (only move or black checkmate on h1) how does black win?

This took me a long time to find lol, and it's not forced (just a possible queen sac if white doesn't see the checkmate) but here it is:

22. Qg2 d2
23. Qxc3 Bd3+
24. Re2 d1=Q #

if white doesn't take on on c3 (23. Qxc3) and instead Bxd2, then:

23. Bxd2 Bd3+
24. Re2 Qxg2+
25. Kxg2 Bxe2

winning white's rook. So, it's a win-win situation for black. I think that's the best, there may be one better

actuallly ^^ that wouldn't be (an immediate) checkmate looking at it again, however it puts black in an awfully nice position! :D

in your first analysis, after 24... d1=Q white king can go on g2 square

in your second analysis better is :

23 Bxd2 Bd3+
24.Re2 Bxe2+

and now if :

25. Qxd2 Qh1+ mate
25. Kxe2 (or Ke1) Qxg2 (winning the queen and threatening Re8+

there is a checkmate in the first analysis. I will let you find it.

checkmate with pawn!

i'm actually quite proud of it, after losing a rook to a knight - i'm so poor i always get that against the sicilian - i also sacrificed a full knight to get his king out in the bushes...

the topping on the cake is the mate with pawn on f7.

lichess.org/analyse/m8ir9a2w

well it's not really an unusual one but is still a pretty rook sacrifice checkmate

lichess.org/analyse/e2dxfzfz/black

I was black btw

another one lichess.org/analyse/b9ut23h5