Mate with a knight and bishop?

I've gotten it a couple times. Once in a themed tournament, once in a regular game (see below). Not much and better things to focus on for sure, but I would never forgive myself if I drew that endgame haha. Not because it's a bad result, but because I think finishing a B+N is a really nice feather in your cap if it ever does happen.

I disagree w/ other's points regarding computer vs. person. At least with the method I use (the smaller and smaller triangles), people will often allow themselves to be trapped without knowing it. The hardest part in my mind is getting them in that first triangle, which of course you can force, but for which the engine does a better job of fighting against than in person, at least in my experience.

Once I get the King to the edge, I can finish it off. Getting to that point is the chore for me.

Really ?
First - lone King cannot stop you from bringing your King to any of the four central squares of the board.
Zugzwang makes that easy.  He cannot maintain opposition.
And you can use your bishop to stop him from getting opposition back. 
That already keeps him out of the center.

From there - you mainly use your bishop to force him back.
For example - if he's got opposition and your bishop is on the square in between - that could be a good time to improve your knight.  
He then has to back off towards the edge.
Then you take the opposition.  
You're already beginning to confine him.  

But this gets easier with 'Deletang' triangles.  
The beauty of which - you can actually let him bounce off the edge of the board - but it doesn't matter.  He's trapped behind that slanted line.
Obviously its not as easy as with a rook.
But with the assistance of your King - and of your knight here and there -
your three pieces can confine him and force him back as surely as with a rook.  

OK. After a couple hours practice, I can now efficiently move the opposing king to the edge. My trick is to push the opposing out of the center as previously explained and then "imagine a new center" and try to control that, again pushing the opposing king back. Once I have the opponent;s king on the edge and my king on c3, f3, c6 orf6, I can position my bishop and knight and continue with the "W" pattern. Will revisit this in about a week to see how well I've retained tha pattern.

I need to investigate and learn the Deletang triangles

Thanks @playerafar

This is the hardest checkmate to be done

Queen versus rook is no picnic.
Its a book win - but the 'theory' is not well articulated.  Not that I know of.
The good news is that the side with the rook blunders much more often than the side with the Queen.
The rook has to stay close to his King.
Plus the defending King has to try to avoid the edge of the board and the corners.  
The attacking King has to reduce or handle rook-checks and avoid pins and skewers.  Those last two he should be able to do easily.
Maybe there now is a good description of the process available on the net. 
I actually found N+B easier than Q versus rook !  Moreso after being told about 'Deletang's triangles'.  
Which I also liked more - than the 'W' method for N+B.  

the only 2 i haven't completed on endgame trainer are basic & advanced queen endings... i saved the hardest ones for last.

This is the hardest checkmate to be done

Queen versus rook is no picnic.
Its a book win - but the 'theory' is not well articulated.  Not that I know of.
The good news is that the side with the rook blunders much more often than the side with the Queen.
The rook has to stay close to his King.
Plus the defending King has to try to avoid the edge of the board and the corners.  
The attacking King has to reduce or handle rook-checks and avoid pins and skewers.  Those last two he should be able to do easily.
Maybe there now is a good description of the process available on the net. 
I actually found N+B easier than Q versus rook !  Moreso after being told about 'Deletang's triangles'.  
Which I also liked more - than the 'W' method for N+B.  

As long I remember, grandmasters said that knight and bishop is the hardest… Well it doesn’t means I am right.

Regarding mates that are rare - Boden's mate might be even rarer than N+B versus King.  Very easy to understand the mate itself !  
Its a position rather than a sequence.

Smothered mate happens in games - its a position too - not a sequence.
but the most common sequence leading to it - is key.
Queen at b3 or b6 (often the most valuable squares for a Q early in games)  versus a short-castled King.  

'derek grimmell' created a comprehensive series of youtube videos on queen versus rook that i would suggest if you want to learn it well.

@GoogleDestroyer
The "" quote button can be used at top right if you want -
to quote previous posts.   

Another very difficult ending is Rook and Bishop versus Rook.
Some GM games finish that way.
Its not always a win for the side with the bishop.
Some of the positions are actually book draws.
And like many of the classic endings - its not simple theory there.

Everybody usually remembers how to mate with K+R versus King !
Everybody usually can mate with K+Q versus K. 
Even without previous study.
But shockingly many don't know that you don't need the opposition to win with sixth rank King + pawn against lone King.  (provided its not an edge-pawn)

I know that I should use “” quote button, but for some reasons it appears like this. A bug probably. I thought it only appears for me, but it seems for others too. Also what about rook + knight versus rook? I believe knight is quite annoying when it comes to fork….

Oh wow it worked the box appeared 

There's some other useful buttons too.
I don't know what the 'upvote' button is.

not sure but it would make sense if it had to do with people who sort by relevance:  posts with the most 'upvotes' get pushed to the top?

I would prefer to understand it.  But maybe one has to 'learn' it before it can be understood.
The fact there's a 'series of videos' would further confirm its a daunting ending.

But thank you for pointing it out.

I was thinking that too.  
Its an interesting idea - and is perhaps designed to reduce having to wade through many pages of posts to get a gist of the conversation.
The flip side of that - almost literally - is that its the latest posts that are usually read first - or read at all as time passes.
If the intention is to alter the general process of how people approach forums - well it might succeed.
Many don't even read the opening post.  There's no compulsion to do so.
Its - name of forum and then the latest post - and then maybe a few before that.
See the 'drift' ?  Many posts won't be seen to be 'upvoted'

This post has 3 upvotes

checked & yes that was accurate.

Uh did you delete your post?