Shortest-proof-game challenge - Chess Forums - Page 316

cobra91 · 2011-11-27T02:40:56-08:00

Anyone up for this? For anyone that doesn't know, this involves determining the FASTEST way that a given chess position can be reached in a normal (but not necessarily logical) game. 1. Only one answer per person (to discourage guessing, of course). 2. The first person to come up with the so

BishopTakesH7

Feb 4, 2024

0

#6301

Edit: Added more bishops to position.

If you reach a drawn position by insufficient material before this position, the proof game doesn't count.

EndgameEnthusiast2357

Feb 4, 2024

0

#6302

n9531l1 wrote:

EndgameEnthusiast2357 wrote:

Here are some reasonable modifications to the common courtesy rules:

I wonder if you ever have the urge to make a positive contribution to this thread, either by posting a possible shortest proof game for a position someone else has posted, or by posting your own position which presents a challenge in finding a proof game.

I've posted my own positions multiple times but they usually just get ignored. I even posted a game for one of my own positions that beat someone else's attempt by 1 move! Here's one:

n9531l1

Feb 4, 2024

0

#6303

EndgameEnthusiast2357 wrote:

I've posted my own positions multiple times but they usually just get ignored. I even posted a game for one of my own positions that beat someone else's attempt by 1 move! Here's one:

How many proof games have you posted for someone else's position? I don't remember any, but my memory is suspect.

A lot of positions posted here get ignored, and there's usually a good reason for it.

The position you just posted is a good one if legal, and I don't remember it. When did you post it? I can't check it now because my power just went out in a windstorm and my computer is running on battery power and I'll be shutting down until my power comes back on.

EndgameEnthusiast2357

Feb 4, 2024

0

#6304

No the proof game I posted was for my own position which was hard, and it was one move shorter than another person's attempt. The one above is just a new position I thought of.

EvinSung

Feb 5, 2024

0

#6305

EndgameEnthusiast2357 wrote:

n9531l1 wrote:

EndgameEnthusiast2357 wrote:

Here are some reasonable modifications to the common courtesy rules:

I wonder if you ever have the urge to make a positive contribution to this thread, either by posting a possible shortest proof game for a position someone else has posted, or by posting your own position which presents a challenge in finding a proof game.

I've posted my own positions multiple times but they usually just get ignored. I even posted a game for one of my own positions that beat someone else's attempt by 1 move! Here's one:

illegal

EvinSung

Feb 5, 2024

0

#6306

EndgameEnthusiast2357

Feb 5, 2024

0

#6307

This is why I don't usually attempt it..not even close lol

EvinSung

Feb 5, 2024

0

#6308

EndgameEnthusiast2357 wrote:

This is why I don't usually attempt it..not even close lol

wrong positions

EndgameEnthusiast2357

Feb 5, 2024

0

#6309

Oh forgot to move the pawn to e4, well it would still be 70 as I actually triangulated to make it whites move and e4 would have done that.

daStrwbrry

Feb 5, 2024

0

#6310

EvinSung wrote:

#6315

Here's a proof game, might be optimal

EndgameEnthusiast2357

Feb 5, 2024

0

#6311

Less than half of mine..this is why I stand no chance in this thread LOL, half the time was forgetting what squares the pieces had to be on..

n9531l1

Feb 5, 2024

0

#6312

daStrwbrry wrote:

EvinSung wrote:

#6315

Here's a proof game, might be optimal

I was hoping some others might help me celebrate the return of daStrwbrry, who in the past was one of the top contributors here.

EvinSung

Feb 5, 2024

0

#6313

n9531l1 wrote:

daStrwbrry wrote:

EvinSung wrote:

#6315

Here's a proof game, might be optimal

I was hoping some others might help me celebrate the return of daStrwbrry, who in the past was one of the top contributors here.

is it unique

daStrwbrry

Feb 6, 2024

0

#6314

n9531l1 wrote:

I was hoping some others might help me celebrate the return of daStrwbrry, who in the past was one of the top contributors here.

Thanks. It feels nice to be back here after all those months.

EvinSung

Feb 6, 2024

0

#6315

hi

daStrwbrry

Feb 6, 2024

0

#6316

EvinSung wrote:

n9531l1 wrote:

daStrwbrry wrote:

EvinSung wrote:

#6315

Here's a proof game, might be optimal

I was hoping some others might help me celebrate the return of daStrwbrry, who in the past was one of the top contributors here.

is it unique

I'm fairly certain it's unique, after doing a bit of rigorous analysis. However, I might have overlooked something and there could possibly be a dual. Maybe someone else who is more certain than me, or a proof game checker, could validate the uniqueness of the SPG.

EvinSung

Feb 7, 2024

0

#6317

can n9531l1 comp test it

n9531l1

Feb 7, 2024

0

#6318

EvinSung wrote:

can n9531l1 comp test it

Stelvio 1.31 says it's unique. If EvinSung composed it, it's the new record for longest unique SPG composed by one of the regulars here, breaking Leither123's 32.0 record.

To my knowledge, the longest unique SPG by anyone is still 57.5 moves.

EvinSung

Feb 8, 2024

0

#6319

i did compose it

EvinSung

Feb 8, 2024

0

#6320