Tactics on diagonals, do they exist?

That's too basic. I am asking for a study, something with tactics problems, and not a Wikipedia 2-3 sentence overgeneralized definition.

Let's see the next new person give a comment that doesn't address the question. It's always a new account. It's never the same person in a conversation.

Wow . . . you're welcome?

Try this then: https://shop.chess.com/e-dvd-studies-in-bishop-pairs-chess-lecture-volume-170/

Is that any better than going through these videos? https://www.youtube.com/results?search_query=Bishop+Pairs+-+Chess+Lecture

Of course I am now. If someone asked me "How do I get to the nearest hotel?" and I answer "Well, you you put your foot on the accelerator and turn the steering wheel ." then I wouldn't expect much of a thank you. But giving an address or directions certainly warrants a thank you.

Interesting, I always used bishops as a 50/50 team. One bishop goes on 32 squares and the other bishop goes on the other 32 squares. Only 4.5 minutes into Ben Finegold's video, he explains giving up the bishop pair. Perhaps we should rename it to something like bishop attacker and bishop defender which make up a "bishop team". 

Normally, you don't stab an eye to make your vision better. You keep your pair of eyes.

Normally, you don't break a foot to become more agile. You kick with one foot and support your weight with the other. See? I am already learning. 

the theme you're looking for is called "discovered attacks"

solving puzzles might help.

I hate to nitpick here, but I don't think it is discovered attacks. This is a discovered attack.

The bishop was blocking the attack. You can read about it here, https://www.chess.com/article/view/the-dreaded-discovered-attack 

That isn't what I am talking about. I am talking more about a position like this.

As you can see there is no discovered attack.

So I left this topic but I actually prepared something for you (OP):

We have, bishop sacrifices patterns like the:

'GREEK GIFT:

FISHING POLE:

We also have some tactics:

The first 2 are opening traps. The third tactics one is a bit too far at the end of a game. The 4th is kind of what I am looking for, but it's an illegal position. You can't have no pawns played and have a queen and bishop out. It would make more sense to have one LSB and one DSB also. Perhaps a few more moves to make it a middlegame thing. Work in progress. Then the fifth, last one, is like the third, too far at the end to be a middlegame tactics puzzle for bishops.

I'm just giving an example

OP is really just a variety of troll.  We see this all the time.  How dare you suggest that I shouldn't study the Fried Liver attack at 600 rating!  That isn't what I asked!  Even more so than that example, since numerous folks have already explained that bishop tactics overlap with and are found in other categories of tactics.  Studying discovered attacks, pins and other tactical categories that only involve bishops would, of course, be a horrible idea since the value of a tactical problem is largely lost if you know what piece needs to be moved.  Just let him have fun looking for a pure bishop collection that doesn't exist.  Heck, its the internet, maybe he'll find something, and then he can search for "rook problems involving en passant the move before in games played on Thursdays".  Or maybe he wants something at the level of the "here is how to move the knight and how to do a knight fork" sets, which definitely do exist since the knight is so tricky.  I suppose there are probably some bishop sets at that "I don't know how to move the piece yet" level.

"How dare you suggest that I shouldn't study the Fried Liver attack at 600 rating!"

I am not sure how that relates to me, are you saying that is something I would say or that I don't think you should? If you look at my games or play me, I avoid the Fried Liver and play the Polerio instead. As for others studying it, it's up to them. I could care less.

"since numerous folks have already explained that bishop tactics overlap with and are found in other categories of tactics."

There is a significant difference in endgame positions and illegal positions with bishops than a middle game bishop tactics puzzle. It's not trolling to ask for those specifically.

"Studying discovered attacks, pins and other tactical categories that only involve bishops would, of course, be a horrible idea since the value of a tactical problem is largely lost if you know what piece needs to be moved.  Just let him have fun looking for a pure bishop collection that doesn't exist.  Heck, its the internet, maybe he'll find something, and then he can search for "rook problems involving en passant the move before in games played on Thursdays".  Or maybe he wants something at the level of the "here is how to move the knight and how to do a knight fork" sets, which definitely do exist since the knight is so tricky.  I suppose there are probably some bishop sets at that "I don't know how to move the piece yet" level."

The forum name is game analysis. Your whole blathering diatribe above limits people from the get go. Why do we want your flavor of trolling? It's not helping. If you don't like my questions then simply don't reply. Is it that hard? You have to accuse people of being a troll? What do you accomplish besides mob rule? Do you get anything out of this if a moderator reads this thread and allows the person to ask questions? Do you even get anything out of this is if a moderator is one of your cronies and thinks you are an Einstein by calling people trolls?

What do you gain by this? If you don't see benefit in categorizing tactics problems then please leave it to others to discuss. 

Is that tactics with bishops or tactics with rooks? 21. Rac1

10...Bg4 starts the bishop threats 

Bishops played a side role. I think in the game after 15. Nd5 Black had a strong Qxe4 to silence the bishops.

That's why I can't get into random tactics, especially endgame stuff. That's why I am asking for MIDDLEGAME BISHOP TACTICS. Something with the action between moves 33% to 66% of the game.

Are you not posting the full game also? It only shows up to move 23.

Since I can't see the examples I provided before, I will post a new example from a GM game that shows what I am asking about. Hopefully this will clarify any confusion. I am not looking for endgame stuff or opening stuff. 

We have the following moves. I'll put them in three groupings. The highlighted red is an example of what I want to get tactical bishop puzzles from.

Group 1

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. h3 O-O 6. Be2 c5 7. c3 Qb6 8. Qb3 Be6 9. Qxb6 axb6 10. a3 Bd5 11. O-O Bc6 12. Nbd2 Nbd7 13. Rfe1 Rfd8

Group 2

14. Bh2 b5 15. Bf1 e5 16. e4 exd4 17. cxd4 d5 18. e5 Ne4 19. dxc5 Ndxc5 20. Rac1 Nxd2 21. Nxd2 Ne6 22. Bg3 Bf8 23. Red1 b4 24. axb4 Bxb4 25. Nf3 Ba4 26. Rd3 Rac8 27. Rxc8 Rxc8 28. b3 Bc6 29. Rd1 Ra8 30. Ne1 Ra3

Group 3 (Part A)

31. Nc2 Rxb3 32. Nxb4 Rxb4 33. f3 Rb2 34. h4 h6

Group 3 (Part B, if you want to address Group 2 going up to 34 moves then add that to group 2.)

35. Bf2 Ba4 36. Rxd5 Rb1 37. Be3 Bb3 38. Rd2 Bc4 39. Rf2 b5 40. g4 b4 41. Kg2 Bxf1+ 42. Rxf1 Rxf1 43. Kxf1 b3 44. Bc1 Nf4 45. Ke1 Nd3+ 46. Kd2 b2 47. Bxb2 Nxb2 48. Kc3 Na4+ 49. Kd4 Kf8 50. f4 Ke7 51. f5 gxf5 52. gxf5 f6 53. Ke4 Nc5+ 54. Kf4 h5 0-1

In group 2, we have something going on with the bishops to maintain the position. After one bishop was traded off, black can advance the b pawn to win the game. If you feel white could have done something to at least challenge black's strength by playing the other bishop in Group 3, then part A might want to be addressed too. Otherwise, treat A and B as just group 3. 

This is a good example because the queens are off the board early and the rooks don't play a part until the knights start doing their thing. So, from this game what position do you think in Group 2 or Group 3 (Part A) would be good for a bishop tactics puzzle? If you have another game similar to this that can be broken into three groups and address the middle portion, please post it.

Take a look at the example I just posted. I am not looking for endgame stuff. In your game, there were plenty of queen moves that could have been made as well as. I am trying to focus on bishops in the middle of the game not the end or opening.

"And from move 15 to move 23, is it not middlegame? Yes it's a middlegame that turns swiftly, out of tactics where Bishops are heavily involved, to a so totally imbalanced engame that black does resign."

Bishops don't get traded until move 22. The game ends on move 23. Thus, the rhetorical question, is that the whole game? If the game went on for 20 more moves, 20 more QUALITY moves, then yea, then we could make that the middlegame. This was not a good example game of bishop tactics that I am looking for and full of other missed opportunities by the other pieces.

A mistake is still a mistake. Just because you might make fewer mistakes doesn't mean we should learn those mistakes. Black clearly had the game until they blundered. That's why it ended so early.

What is a diagonal?

If you like to play tic tac toe, then you already know.