I don't have it in front of me, but the idea is Bishop goes to h4, Knight goes f3 g1 (who looks at Ng3 when all the action is about the center?) h3 f4, allows the king to meander h8 to take the white pawn while keeping the black pawn on the board... From there it is easy- at least according to GMs... For me? I'd still lose either side.
World Championship Game 6 Mate in 30
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@FlashyFerrari, thanks for that.
That is hard.
Nov 21, 2018
0
#5
There's been a lot of conflicting claims about the forced mate found by Sesse/Stockfish. Most sources say it's M30, a few say M36, but when an actual mating line is shown, it takes longer, such as the M42 given in the Chess.com news article and quoted above, and even a M63 on a Reddit post. After some digging around, I found this screenshot of Sesse from a chess journalist's Twitter account that suggests it's M36:
But it's not confirmed - frustratingly, you only see about a third of the moves, and it seems impossible to work out the full sequence from that. You'd think that with 10,901 viewers, some of them must have captured the full variation and posted it online, but I couldn't find it anywhere.
Another strange thing is that when you consider all the GM analysis of the amazing variation found by the computer, they all start with 68...Bh4!! and finish with 84...Kxh7 (Black wraps up by winning the P) - but this line is definitely not a M36! We know that because 84...Kxh7 reduces the position to 7 pieces, after which the Lomonosov tablebases can tell us the exact number of moves required by Black to mate - and that is another 41 moves. Assuming the sequence from 68...Bh4!! to 84...Kxh7 is accurate - and many GMs seem happy with it - the forced mate sequence is actually M58! The M42 and M63 sequences mentioned above have a lot of sub-optimal moves according to Lomonosov using DTM.
Nov 21, 2018
0
#6
EndgameStudier wrote:
So its more of just a win then a direct checkmate. I thought there was some kind of mating net with the knight and bishop and alot of knight manuevring to force the mate. But it just transposes into a knight and bishop vs king mate or a pawn promotion. Got it.
Yes, the H pawn becomes irrelevant because you can move the black King in the way without material loss. Then white has the choice of how to be mated, slowly or very slowly.
Nov 25, 2018
0
#7
Hey I eventually found the Sesse M30 and M36, and they are quite bizarre. Check out my blog for the full story: Carlsen-Caruana WCC Game 6 – The actual forced-mate sequence that was missed.
According to someone's analysis of the game, a supercomputer which was tracking the game found a forced checkmate in 30 moves for black, with black to move. I can't for the life of me find it, does anyone knows what the moves are?