Puzzles needed for tactics trainer

Link to game: http://www.chess.com/livechess/game?id=369218000

nyLsel's #621 is just so awesome!

puzzle No. 2 is much good than the Puzzle No. 1. and 3

I don't think it is a allowed to submit from ongoing games. We are not allowed to comment the game here where you can see it and computer analyses on ongoing games is not ok.

Page33 submissions

MSC157, the first two moves are too easy and third ambiguous with Na4 not much worse than Nc4. Even Bxb5 is not worse than Qxg3. Please check submissions with a computer as requested in the first post.

Thankyou Metaknight251 for the 196th puzzle http://www.chess.com/tactics/server?id=249561  . However please write down the move number of the start of your puzzle above your diagram so I don’t have to go through the whole diagram’s moves, and check your submissions with an engine. I had to add a knight and rook to black’s position to allow the problem to continue, which was time consuming to work out. 

Thankyou Abhishek2, for the 197th puzzle http://www.chess.com/tactics/server?id=447607 (An amazing puzzle but unfortunately it cannot continue far enough to be conclusive, so we shall see how it is received by tactics trainer users. It is likely to be a 2900+ problem and users at that level may think it needs to be deleted.

koala8, thankyou for the 198th puzzle http://www.chess.com/tactics/server?id=233597 However as above, please use a computer. I had to remove a bishop, knight and rook from black’s side to make this problem work !

Thankyou samlong1989, for the 199th puzzle http://www.chess.com/tactics/server?id=449869 however the puzzle is a refutation of your submission. Please use a computer as requested in the first post.

Martin, unfortunately 2…Qd4 is almost as good as 2….dxe4 making the problem ambiguous.

schnitba, thankyou for the 200th puzzle http://www.chess.com/tactics/server?id=271339 (white bishop removed to prevent ambiguity)

Scottrf, thankyou for the 201st puzzle http://www.chess.com/tactics/server?id=64691 and 202nd puzzle http://www.chess.com/tactics/server?id=366193 

See http://www.chess.com/tactics/server?id=435831 for

GM AlexanderL’s comment

‘this idea of bringing the last reserve into the game and having harmony of the pieces is just lovely. I'm happy that tactics trainer is getting new types of puzzles to make your brain work.’

Thanks katonas!

By the way, all of these are tablebase checked, and all end when there are multiple ways to win (or it's just obvious opposition).

The 10th and 11th you just added, 9th I'm not sure is suitable (2nd and 6th may already be on there, they are quite famous) but the rest should be good.

http://blog.chess.com/Scottrf/pawn-endgames

I checked with the computer already before, but seems we have different computer engines, my engine isn't strong enough maybe? If it is not ok, I give up and I will try to post another one then. :)

I thought I'd share these 3 problems I've approved in the last 24hours.

http://www.chess.com/tactics/server?id=94877

http://www.chess.com/tactics/server?id=262009

http://www.chess.com/tactics/server?id=287631

I am liking this one... From this game

Anyone who doesn't have a computer to check a puzzle should either add their puzzle to http://www.chess.com/forum/view/more-puzzles/help-needed-to-checkalter-puzzle-to-go-on-tactics-trainer and ask for help, or try the free chess computer programs I've linked.

A nice forcing combination from one of my blitz games. Sadly in the actual game I lost on time 1 move before its completion. ;<

Anyway solve it if you can ;D

Edit: Changed the position ever so slightly in o0rder to remove one of the solutions...

Black played Qf6-g5 leaving the following position:

Then change the line to 2.dxe4 Qc3# I did give 2 lines just in case

Martin, 2.Nxe4 (-2.8) is white's (computer's) best move. Often I've  let the computer play a blunder and be mated when it is to save a lot of material such as a queen or rook, but here the mate threat just seemed too obvious and the loss of material (a knight) too slight for the computer to make the blunder 2.dxe4?? Qc3# 

However, I asked a senior approver whether 2...dxe4?? could be allowed and it can, because it forces black to show why he opened the diagonal.

Page33 submissions (re-visited)

Thankyou and my apologies, Martin0, for the 202nd puzzle http://www.chess.com/tactics/server?id=282623

If you like fairy stories and want to see the effect your beautiful flies are having on the frogs in the swamp then have a look at the discussion on problem 

http://www.chess.com/tactics/server?id=474557

After a while the frog realized he should have been a dragonfly as this was his avatar.

DJDopamine, I'll be looking at the next page of submissions on Tuesday (in turn ) 

Chapters 2 and 3 of the fairy story have been written, and may help understanding who is who...

http://www.chess.com/tactics/server?id=474557

Probably around 800 rating checkmate. :)

http://www.chess.com/livechess/game?id=24833570 Sadly I lost this... so many blunders. :((

Metaknight, I really like the Kg6 variation, it would make for a very interesting puzzle.  The last thing you expect is that the king will rush at you when you check him... but apparently he lives longer that way!