29 Oct '07 13:30>
This position comes from the game Barcza - Rethy, Budapest 1953
White to move
White to move
Originally posted by WulebgrFirst things first. I think the mate needs to be on h8 so if I am correct that is the corner to which the K must be forced before the N on c3 moves when it has 3 moves to deliver mate.
This position comes from the game Barcza - Rethy, Budapest 1953
White to move
[fen]1k6/8/2K5/2N5/8/2p5/2N5/8 w - - 0 127[/fen]
Originally posted by Wulebgr1.Kd7 Ka7! 2.Kc7 Ka8 Now white need to get their knight to d6 and the king to b6. How to do that? 3.Kb6! Kb8 4.Nb7 Kc8! 5.Kc6 Kb8 6.Nd6! Ka7 7.Kb5 Kb8! [7...Ka8 8.Kb6 Kb8 9.Nb4 c2 10.Nc6+ and 11.Nb5 and 12.Nc7#] 8.Kb6 Ka8 Okay, task accomplished. 9.Kc7! Ka7 10.Nb4 c2 11.Nc8+ Ka8 12.Nc6 and 13.Nb6#
This position comes from the game Barcza - Rethy, Budapest 1953
White to move
[fen]1k6/8/2K5/2N5/8/2p5/2N5/8 w - - 0 127[/fen]
Originally posted by ilywrinI always understood that in order to mate with 2 knights you required your opponent was required to fall on their own sword and help you to mate them
1.Kd7 Ka7! 2.Kc7 Ka8 Now white need to get their knight to d6 and the king to b6. How to do that? 3.Kb6! Kb8 4.Nb7 Kc8! 5.Kc6 Kb8 6.Nd6! Ka7 7.Kb5 Kb8! [7...Ka8 8.Kb6 Kb8 9.Nb4 c2 10.Nc6+ and 11.Nb5 and 12.Nc7#] 8.Kb6 Ka8 Okay, task accomplished. 9.Kc7! Ka7 10.Nb4 c2 11.Nc8+ Ka8 12.Nc6 and 13.Nb6#
Originally posted by MctaytoTrue, but this is specifically two knights versus pawn, where the pawn helps against stalemate at a key moment.
I always understood that in order to mate with 2 knights you required your opponent was required to fall on their own sword and help you to mate them
Originally posted by Dragon FireI'm thick! So after a little research using Averbakhs "Knight Endings" here is a solution.
First things first. I think the mate needs to be on h8 so if I am correct that is the corner to which the K must be forced before the N on c3 moves when it has 3 moves to deliver mate.
On a8 I don't think mate can be delivered as the Q will either give check or be able to capture the checking N (on c7).
So Ne6 - c7 - b4 but I have previously failed with this difficult mate so I might be going up the wrong path.
Originally posted by Dragon FireI used an engine and a database to find this one. 😉
I'm thick! So after a little research using Averbakhs "Knight Endings" here is a solution.
1. Kb6 .. Kb8;
2. Nb7 .. Kc8;
3. Kc6 .. Kb8;
4. Nd6 .. Ka7;
5. Kb5 .. Kb8;
6. Kb6 .. Ka8;
7. Nc8 .. Kb8;
8. Ne7 .. Ka8;
9. Kc7 .. Ka7;
10. Nb4 .. c2;
11. Nec6+ .. Ka8;
12. Nd5 .. c1=Q;
13. Nb6# 1-0
So who now says books are useless?
Originally posted by Sam The ShamWhether the position is winning or not depends on where the pawn is blockaded. It's different for each file (although symmetrical a-d vs. e-h files). Assuming that the pawn is blockaded far enough back. I'd say converting the win is roughly as difficult as mating with K+B+N v. K. I wonder what percentage of players are able to do this? As a wild guess I'd say ~10% of regular players.
Mate with king and two knights against king+pawn, how many people are actually good enough to do that in under 50 moves, if at all?
Originally posted by Sam The ShamGedeon Barcza for one.
Mate with king and two knights against king+pawn, how many people are actually good enough to do that in under 50 moves, if at all?
Originally posted by Sam The ShamI once played an IM in a simul- I was down material and sacked a minor piece such that it was K and 2 Knights vs. king and one pawn- even though it was a simul he managed to mate me!
Mate with king and two knights against king+pawn, how many people are actually good enough to do that in under 50 moves, if at all?
Originally posted by chesskid001When I practice these, Fritz keeps muttering "not many choices, are there" and then, just before I crush the beast, "wee, the rabbit's free, all the way to the other side."
I once played an IM in a simul- I was down material and sacked a minor piece such that it was K and 2 Knights vs. king and one pawn- even though it was a simul he managed to mate me!