Arisktotle wrote:
What is "Endgame"? What is this discussion about? Which post?
@EndgameEnthusiast2357
Shortest-proof-game challenge
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Nov 25, 2023
0
#5983
n9531l1 wrote:
EvinSung wrote:
#5984
Here's one of several solutions in 9.5.
where are the others
Nov 25, 2023
0
#5984
Ilampozhil25 wrote:
Rg1 is just included to spite endgame enthusiast, yes?
yes
EvinSung wrote:
n9531l1 wrote:
EvinSung wrote:
#5984
Here's one of several solutions in 9.5.
where are the others
How many do you need? Here's another one.
EndgameEnthusiast2357 wrote:
BishopTakesH7 wrote:
I find Endgame's logic funny since the following are apparently against the rules:
- Any games that end with black resigning.
- Any endgame studies that end with a white move (most studies.)
- Any game where white checkmates black.
Resigning is technically a move by black, so I'm fine.
Actually with studies I prefer they begin with white to move, just as white begins an actual chess game, so therefore I prefer they also end with white to move. Any study that starts with black to move, the position can be inverted where white has the pieces.
Resignation is not a move. It's a action outside of the possibilities on the board itself. The starting position has 20 moves, not 21.
I still have no clue what "Endgame" refers to - probably not "endgames". But I know that "resigning" is commonly unacceptable in compositions. Otherwise black could e.g. destroy all selfmate compositions by resigning on move 1 of the intended solution. The composition field does better with only automaticities and no interventions by arbiters or player claims.
Arisktotle wrote:
I still have no clue what "Endgame" refers to - probably not "endgames".
Your clue was at #5989. "Endgame" was the short name being used for EndgameEnthusiast2357.
RewanDemontay wrote:
The starting position has 20 moves, not 21.
That's true. Do you know the names of all 20 possible first half-moves?
EvinSung wrote:
#5997
Here are two of several solutions in 9.0.
Nov 26, 2023
0
#5993
n9531l1 wrote:
RewanDemontay wrote:
The starting position has 20 moves, not 21.
That's true. Do you know the names of all 20 possible first half-moves?
anyway...
a3 is the anderssen attack
a4 is the ware opening
b3 is the nimzowitsch larsen attack
b4 is the polish opening
c3 is the saragossa opening
c4 is the english opening
d3 is the mieses opening
d4 is the queen's pawn game
e3 is the van't kruijs opening
e4 is the king's pawn game
f3 is the barnes opening
f4 is the bird opening
g3 is the king's fianchetto attack
g4 is the grob attack
h3 is clement's attack
h4 is the kadas opening
Na3 is the sodium attack
Nc3 is the van geet opening
Nf3 is the reti opening
and Nh3 is the amar opening
most of these have other names
n9531l1 wrote:
Arisktotle wrote:
I still have no clue what "Endgame" refers to - probably not "endgames".
Your clue was at #5989. "Endgame" was the short name being used for EndgameEnthusiast2357.
Thx, I misunderstood that as a referral to @Endgame.." to answer the question. Anyways, the rules mentioned in the related post do not exist for SPGs in general. Stipulations with half-moves (like #4.5) are as common as those with full moves. As you know there are also "EPGs" where the number of moves must be exact. I made one with EPG #7.0 which had other solutions in #6.5.
Ilampozhil25 wrote:
6000th
Nope lol
Ilampozhil25 wrote:
n9531l1 wrote:
Do you know the names of all 20 possible first half-moves?
anyway...
most of these have other names
Which move has the most names? I think it could be 1. Nc3:
Dunst Opening, Heinrichsen Opening, Baltic Opening, Van Geet Opening, Sleipnir Opening, Kotrč's Opening, Meštrović Opening, Romanian Opening, Queen's Knight Attack, Queen's Knight Opening, Millard's Opening, der Linksspringer (in English, the Knight on the Left).
Arisktotle wrote:
As you know there are also "EPGs" where the number of moves must be exact. I made one with EPG #7.0 which had other solutions in #6.5.
A while back there was a discussion here about the greatest possible move-length difference between a position's SPG and its SUPG (shortest unique proof game). For your position the difference would be 0.5. The position below has SPG in 3.0 (there are four of them) and SUPG in 4.0, for a difference of 1.0. Do you know of a position with a difference greater than 1.0?
n9531l1 wrote:
Arisktotle wrote:
As you know there are also "EPGs" where the number of moves must be exact. I made one with EPG #7.0 which had other solutions in #6.5.
A while back there was a discussion here about the greatest possible move-length difference between a position's SPG and its SUPG (shortest unique proof game). For your position the difference would be 0.5. The position below has SPG in 3.0 (there are four of them) and SUPG in 4.0, for a difference of 1.0. Do you know of a position with a difference greater than 1.0?
No! I used to in the time when I tried to keep pace with the latest developments. About 2 decades ago I read some articles about the subject with examples. Obviously the theoretical gap maximum is 1.5 as 2.0 would imply you can play an extra move and undo it. But I don't remember if 1.5 is possible! I am both a bad archivist and have an age affected memory which causes me to lose bits of history. Sorry for that.
I find Endgame's logic funny since the following are apparently against the rules:
What is "Endgame"? What is this discussion about? Which post?