This is why you shouldn't play the dragon, kids: Checkmated with a knight on b8 and rook on a8? Still theory!
Tactics, anyone?
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blueemu wrote:
Optimissed wrote:
Well, I wasn't very impressed because it gave my solution for #2 as wrong. But I liked mine better, mainly because it was the first thing I saw. White plays Qd5 and however black defends the checkmate, plays QxB followed by Ne7 checkmate.
Not sure what you mean. Isn't that line a move slower?
1. Qd5 e6 2. Qxe5 f6 where's the mate? It takes you four moves instead of three, no?>>>
This was presented as an hypothetical situation in a chess game and the line I gave was the first line I spotted, so I'd probably have played it in blitz. The time lost by looking for another series of moves other than an obviously winning line completely outweighs the time gained by saving a move. I'm talking about clock time, which is the only relevant type of time in chess, and I get irritated by chess problems that mark as "wrong" perfectly correct lines with a forced win. I think they're bad for our chess, not good. That's just my own view.
Incidentally, it's why I don't use tactics trainer here on chess.com. It marks as wrong perfectly winning lines which don't happen to be those that someone else, whoever that is, would use. So I find them to be irritating and bad for confidence, which is an important part of chess. I think I did about three of them by mistake at one point. Somehow I clicked onto them so I thought I'd do them. I think that playing a bit of three-day chess is better. Lots of time to analyse potential positions.
Yeah there are a lot of bad problems on tactics trainer.
Scottrf wrote:
Yeah there are a lot of bad problems on tactics trainer.
Really , I saw only 1 out of 3000 tactics I played here. ( That one problem is incorrect, agreed by almost everyone that played the puzzle)
Yeah there are loads.
Jan 20, 2019
0
#28
1) Thank you bluemu for your contribution to this thread; you show really good on-level tactics for everyone.
2)Sorry; my games aren’t exactly very interesting or positional, so I would like for some more positional tactics to be posted.
3) When my game with ove finishes, I have some tactics to show....
2)Sorry; my games aren’t exactly very interesting or positional, so I would like for some more positional tactics to be posted.
3) When my game with ove finishes, I have some tactics to show....
blueemu wrote:
And here is a beautiful Interference combination from a game by Tarrasch, played more than 100 years ago. I will explain how it works, and then you can see if you can find the winning move.
Interference is a tactical theme that takes advantage of the fact that the Bishop, Rook and Queen all move in straight lines (unlike the Knight, for example). These straight lines, files and diagonals, will often intersect on certain squares... which makes those squares especially sensitive, since they must be kept EMPTY if the lines passing through them are to remain open.
In the following example, Black is under heavy attack but he seems to be holding it together, at least for the moment. His Rook at c8 prevents the threatened Rook mate on c5, while his Queen on d7 prevents the threatened Queen mate on b7. But these two lines (c8-c5 and d7-b7) intersect on the c7 square... so that square must be kept EMPTY...>>>>
Again there are problems. Black isn't holding it together at all because, at least so far as I can see, the simple Bd6 also wins easily. I think black has to give up the Q to prevent a quick mate, after which he can resign. My point is that in a real game, all a player usually needs is a forced win and not a pretty solution.
I did look at that but it's a forced mate for white.
Looks like
Bd6 ...Ka5
Rc5+ Rc5
Rc5+ Kb6
Rc7 Qc7
Bc7 Kc7
so no, sorry, there was no mate .... I was wrong, but there's a forced win for white all the same because in this position white's Q is far stronger than the B and R. I don't have a chess engine so all analysis is by hand.
Jan 20, 2019
0
#33
AlisonHart wrote:
This is why you shouldn't play the dragon, kids: Checkmated with a knight on b8 and rook on a8? Still theory!
My own favorite example of someone getting a hopelessly lost position before they've left theory is this one:
https://www.chess.com/daily/game/200865884
We didn't leave The Book until move 28 (!) by which time White was already getting mated.
Of course, we all have our personal favorites...
I had one with 15 moves of theory and the first move out of theory dropped a piece...
Scottrf wrote:
Yeah there are loads.
Just show me a few. All tactics are checked by engines.
There is possibility of engine error when the engine analysis is too short, but it is extremely rare.
drmrboss wrote:
Scottrf wrote:
Yeah there are loads.
Just show me a few. All tactics are checked by engines.
There is possibility of engine error when the engine analysis is too short, but it is extremely rare.
I don't remember the problem numbers, surprisingly.
I've literally reported dozens which have been shortened. Believe what you want, but the tactics on this site are a mess.
You can see on the comments for some, moderators have to manually shorten them:
https://www.chess.com/tactics/82346
This I believe is one but I can't repeat them as not premium:
https://www.chess.com/tactics/342697?page=2#comments
https://www.chess.com/tactics/8234
Scottrf wrote:
drmrboss wrote:
Scottrf wrote:
Yeah there are loads.
Just show me a few. All tactics are checked by engines.
There is possibility of engine error when the engine analysis is too short, but it is extremely rare.
I don't remember the problem numbers, surprisingly.
I've literally reported dozens which have been shortened. Believe what you want, but the tactics on this site are a mess.
You can see on the comments for some, moderators have to manually shorten them:
https://www.chess.com/tactics/82346
This I believe is one but I can't repeat them as not premium:
https://www.chess.com/tactics/342697?page=2#comments
Saw both, both are 100% correct. First one was 800 rated problem and people cant answer correctly, so the mods shorten the tactics, it is not problem fault.
Second one is also the same, it is 100% correct.
In tactics, if there is a mate in 6, and if you play mate in 7 or just take piece advantage , you are wrong.
The one that I saw in wrong tactic was rated about 2800 + in which their answer A (their Answer ) leads to + 5 material advantage ( e.g) and the answer B lead to + 3 material advantage . However in longer /deeper calculation that +3 material advantage become + 6 material advantage.
In your tactical rating, you are unlikely to get such complicated tactics.
Was it a mistake that Black moved his king instead of castling/protecting it with another piece?