The longest mate-composition is at the moment ( February 2017 ) mate in 553 moves by Lutz Neweklowsky
https://www.youtube.com/watch?v=GC3oecykcC8
kindly regards
Lutz
Longest Mate (Official) - Mate in 545
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This is a very interesting checkmate. I believe it's the same as I posted (here) as a puzzle. I didn't realize someone already posted this three years ago.
Beside both being mates in 545 (or 546 based on how you count), I can recognize the sequence from 5-10 where the king marches towards the more-powerful rook.
Some other interesting comments are at the other thread too.
Have a look at here - all worldrecords for longest matecompositions from 2001 until today : https://www.youtube.com/watch?v=bqnq580ozAI
lol
idreesarif wrote:
rooperi wrote:
idreesarif wrote:
rooperi wrote:
I think it's just amazing that with tablebases we can find things like this now. I know it's useless, but much of chess' most entertaining aspects are useless.
Question:
Is this definitely the longest mate in the 7 man TB, or just the longest found so far?
The 7-Man TBBs are complete ... so this is surely the longest mate possible with 7 pieces on the board.
Im not sure how TB's are made or structured. Is it possible to search for specific things, eg all mates in 23?
all possible positions with 7 pieces on the board are analysed for every single variation upto mate ....
so yes I think these trivia questions can be answered.
may be you'll like this : http://chessok.com/?page_id=27966
Actually, it is not analyzed until mate. It is analyzed until piece exchange (Hence the DTZ metric in Syzgy TBs). For example, if you tried to now generate 8 piece TBs, once a piece is exchanged, you already have 7 piece TBs solved which you can then use (and so on, and so on...). Just a technicality.
The First generation, Nalimov 3-4-5 Tablebases, however, did analyze until mate. This is the reason the Nalimov TBs are ~ 7GB, and the Syzgy 3-4-5 is ~ 1 GB. Because Analyzing until mate, is giving you repetitious information.
Cant read it all D: D:
https://syzygy-tables.info/?fen=6N1/5KR1/2n5/8/8/8/2n5/1k6%20w%20-%20-%200%201
👆🏻 White is winning with DTZ 484 moves (current longest forced mate record?)
idreesarif schreef:
For this kind of positions the 50 move rule was invented. This position and the material is for humans not to understand by the way. It is a bit like the Quintic equation.
draw because 50 move rule
Jun 10, 2024
0
#33
chaotic_iak wrote:
Murgen wrote:
Does "complete" mean? I'm just asking because the 6-man Nalimov tablebase at some other site doesn't have endgames with a lone King on one side (I wanted to look at a King and Four Knights against King and it wasn't there).
So, for example, does the Lomonosov have King and Five Knights against King (for completeness and interest regardless of how unlikely it is to ever occur)?
According to Wikipedia, "By August 2012, tablebases had solved chess for every position with up to seven pieces (the positions with a lone king versus a king and five pieces were omitted because they were considered uninteresting)."So it is almost complete; it's missing the trivial positions (K+5units vs K), but they are uninteresting (either immediate stalemate or the majority side can win easily).
Never believe what you read in Wikipaedia.
To set the record straight, only a miniscule miniscule miniscule fraction of legal positions with up to 7 pieces have been solved by any tablebases.
To illustrate, the only perfect move in the final position (shown) below is 32...Ka1. It draws (try it against the computer by clicking on the magnifying glass) while 32...Kc1 loses.
If you query this with the Syzygy tablebase
https://syzygy-tables.info/?fen=8/8/8/8/8/K7/1R6/1k6_b_-_-_62_32
it gives Kc1 as the (unique) solution. Similarly for any other tablebases so far constructed or ever likely to be constructed.
In addition no tablebases have been published that solve positions with castling rights and many omit lone king endings for 6 men and above.
The Nalimov and Lomonosov tablebases are (were in the latter case) incorrect under FIDE competition rules for some positions (e.g. at least 7% of KNNvKP positions).
The first mentioned failing is immaterial in game play because if Syzygy's optimal moves are followed from any of the positions it covers with ply count 0 under the 50 move rule, it will result in perfect play, and such an one always appears first. The others are not necessarily immaterial in game play.
wow, if you took that long to mate me I wouldn't complain...