Solitaire of Life

[Billabob]

30:

Code: Select all

x = 11, y = 9, rule = LifeHistory
7.C$.A4.C.A.C$A.C3.C2.CA$.C3.AC$4.C4.2A$4.C4.C$3.AC.AC.A$2.A2.C2.A$2.
CA2.AC!

I think that’s optimal, well done.

[wwei23]

Can I post a puzzle, since no one else seems to be posting one?

[Macbi]

Please do.

[wwei23]

Code: Select all

x = 5, y = 5, rule = LifeHistory
.2A$.A.2A$A3.A$2A.A$2.2A!

I myself will offer a 36-cell solution, the smallest I can get:

Code: Select all

x = 11, y = 11, rule = LifeHistory
2.C$.C.C4.2C$.C.C3.C2.C$2.C.2A2.2C$4.A.2A$3.A3.A$3.2A.A$.2C2.2A.C$C2.
C3.C.C$.2C4.C.C$8.C!

After manually inspecting this one, I noticed that the red cells have to be dead.

Code: Select all

x = 7, y = 7, rule = LifeHistory
2.3D$.D2A2D$2DAD2AD$DA3DAD$D2ADA2D$.2D2AD$2.3D!

As a result, to prevent birth on blue, four cells will always be on:

Code: Select all

x = 7, y = 7, rule = LifeHistory
2.3DC$CD2ABD$DBAD2AD$DA3DAD$D2ADABD$.DB2ADC$.C3D!

All solutions must have at least 24 cells.

Code: Select all

x = 7, y = 7, rule = LifeHistory
2B3DCB$CD2A2DB$2DAD2AD$DA3DAD$D2ADA2D$B2D2ADC$BC3D2B!

Four cells to prevent birth on blue:

Code: Select all

x = 7, y = 7, rule = LifeHistory
2.3DC$CB2ADB$2DAD2AD$DA3DAD$D2ADA2D$.BD2ABC$.C3D!

Such cells will touch white, so four more cells are required to stabilize the white cells.

[Macbi]

I myself will offer a 36-cell solution, the smallest I can get:

Code: Select all

x = 11, y = 11, rule = LifeHistory
2.C$.C.C4.2C$.C.C3.C2.C$2.C.2A2.2C$4.A.2A$3.A3.A$3.2A.A$.2C2.2A.C$C2.
C3.C.C$.2C4.C.C$8.C!

LLS verifies that this the unique optimal solution.

[wwei23]

Almost posted this as a puzzle, but then I was doing my preparative analysis, and then this happened:

Code: Select all

x = 8, y = 8, rule = LifeHistory
3.3D$2.D2A2D$.2DAD2AD$D2A3DAD$DA2D2A2D$2DADA3D$.D2A2DED$2.5D!

What's the highest minimal stabilization to unstabilized ratio possible? I managed to get 3 in that last puzzle.
This will be the next puzzle with 14 cells, then...

Code: Select all

x = 7, y = 7, rule = LifeHistory
3.3D$2.2D2AD$.D2ADAD$2DA3DA$DA2D2AD$D2ADA2D$.2DA2D!

I managed to find a 38 cell solution.

Code: Select all

x = 11, y = 11, rule = LifeHistory
9.C$2.2C4.C.C$.C2.C3.C.C$.C.C2.2A.C$2.C.2A.A$4.A3.A$3.A2.2A.C$3.2A.A
2.C$.2C2.A2.C$C2.C2.2C$.2C!

I just try to make everything connected pre-blocks, because those tend to be excruciatingly hard.
Now for my analysis!

Every solution will have at least 24 cells.
Three are forced on. Three are needed to stabilize the two in the upper left, four to stabilize the one on the lower right:

Code: Select all

x = 9, y = 9, rule = LifeHistory
2.3B$2.BC3D$3B2D2AD$BCD2ADAD$B2DA3DA$.DA2D2ADE$.D2ADA2DE$2.2DA2DC$5.
2E!

[BlinkerSpawn]

Every solution will have at least 24 cells.
Three are forced on. Three are needed to stabilize the two in the upper left, four to stabilize the one on the lower right:

Code: Select all

x = 9, y = 9, rule = LifeHistory
2.3B$2.BC3D$3B2D2AD$BCD2ADAD$B2DA3DA$.DA2D2ADE$.D2ADA2DE$2.2DA2DC$5.
2E!

This would be a lot more fun if you hadn't done half the solving already

Code: Select all

x = 9, y = 9, rule = LifeHistory
.2C2B$C2.C3D$C.C2D2AD$BCD2ADAD$B2DA3DA$.DA2D2ADE$.D2ADA2DE$2.2DA2DC$
5.2E!

[wwei23]

That's not even a still life, what's going on here?

[Majestas32]

Every solution will have at least 24 cells.
Three are forced on. Three are needed to stabilize the two in the upper left, four to stabilize the one on the lower right:

Code: Select all

x = 9, y = 9, rule = LifeHistory
2.3B$2.BC3D$3B2D2AD$BCD2ADAD$B2DA3DA$.DA2D2ADE$.D2ADA2DE$2.2DA2DC$5.
2E!

This would be a lot more fun if you hadn't done half the solving already

Code: Select all

x = 9, y = 9, rule = LifeHistory
.2C2B$C2.C3D$C.C2D2AD$BCD2ADAD$B2DA3DA$.DA2D2ADE$.D2ADA2DE$2.2DA2DC$
5.2E!

:facepalm:

[gmc_nxtman]

New puzzle:

Code: Select all

x = 10, y = 10, rule = LifeHistory
5.C2.C$8.C$3.C2.C$.C2.C$.C2.C$4.2C2.C$8.C$C$3.C5.C$4.2C!

[Goldtiger997]

New puzzle:

Code: Select all

x = 10, y = 10, rule = LifeHistory
5.C2.C$8.C$3.C2.C$.C2.C$.C2.C$4.2C2.C$8.C$C$3.C5.C$4.2C!

42:

Code: Select all

x = 15, y = 11, rule = LifeHistory
12.2A$8.AC2.C$7.A2.A.C$7.C.AC.2A$A.2A.CA.C$2A.A.C2.C$5.A2.2C2.CA$4.A
7.C$4.CA2.2A4.A$7.C2.A2.CA$8.2C!

[Macbi]

42 isn't optimal.

[wwei23]

38 and 38:

Code: Select all

x = 33, y = 11, rule = LifeHistory
9.2A17.2A$8.C2.C15.C2.C$8.A2.C15.A2.C$6.CA.CA14.CA.CA$4.C2.C15.C2.C$
4.CA.C15.CA.C$5.A.2C2.CA6.2A3.A.2C2.CA$2A.A.A5.C7.A2.A.A5.C$A.AC.A.2A
4.A7.AC.A.2A4.A$6.C2.A2.CA11.C2.A2.CA$7.2C17.2C!

And 38 and 38 and 38:

Code: Select all

x = 49, y = 12, rule = LifeHistory
7.2A15.2A18.2A$6.C2.C13.C2.C16.C2.C$6.A2.C13.A2.C16.A2.C$4.CA.CA12.CA
.CA15.CA.CA$2.C2.C13.C2.C16.C2.C$2.CA.C13.CA.C16.CA.C$3.A.2C2.CA9.A.
2C2.CA12.A.2C2.CA$3.A5.C10.A5.C13.A5.C$.CA.3A4.A6.CA.3A4.A7.A.CA.3A4.
A$2.A.C2.A2.CA4.A2.A.C2.A2.CA7.2A.A.C2.A2.CA$A4.2C9.2A4.2C18.2C$2A!

35:

Code: Select all

x = 11, y = 11, rule = LifeHistory
6.2A$5.C2.C$5.A2.C$3.CA.CA$.C2.C$.CA.C$4.2C2.CA$.3A4.C$C3.2A4.A$2A.C
2.A2.CA$4.2C!

34:

Code: Select all

x = 11, y = 11, rule = LifeHistory
6.2A$5.C2.C$5.A2.C$3.CA.CA$.C2.C$.CA.C$4.2C2.CA$A.2A4.C$CA2.2A4.A$3.C
2.A2.CA$4.2C!

[Macbi]

Yep, 34 wins.

[AforAmpere]

Here's a new one:

Code: Select all

x = 11, y = 10, rule = LifeHistory
7.2C2$4.C4.2C$C8.C$C5.C$.2C3.C$3.C2$6.C$6.C!

[Macbi]

Here's a new one:

Code: Select all

x = 11, y = 10, rule = LifeHistory
7.2C2$4.C4.2C$C8.C$C5.C$.2C3.C$3.C2$6.C$6.C!

33

Code: Select all

x = 11, y = 11, rule = LifeHistory
3.2A2.A2.A$3.A3.2C2A$4.A$3.AC4.2C$CA7.C$C5.CA.A$.2CA2.CA.2A$3.C2$6.CA
$6.CA!

[Saka]

Here's a new one:

Code: Select all

x = 11, y = 10, rule = LifeHistory
7.2C2$4.C4.2C$C8.C$C5.C$.2C3.C$3.C2$6.C$6.C!

34:

Code: Select all

x = 13, y = 11, rule = LifeHistory
9.A$3.2A2.2C3A$3.A2.A5.A$4.C2A2.2C.A$CA7.C.A$C5.C2A$.2CA2.C$3.C2$6.CA
$6.CA!

EDIT: Aw really? Darn it!

[BlinkerSpawn]

29 looks better:

Code: Select all

x = 11, y = 11, rule = LifeHistory
7.A$7.2CA$2.2A6.A$.A2.C4.2C$C.2A5.C$C5.CA.A$.2CA2.C.A$3.C2$6.CA$6.CA!

[Hdjensofjfnen]

31. It doesn't improve the previous one, but is still worth noting, if only for the 16-bitter:

Code: Select all

x = 12, y = 11, rule = LifeHistory
7.A$7.2CA$10.A$.2A.CA3.2C$C.A.A.A2.C$C5.C4.A$.2CA2.CA2.2A$3.C2$6.CA$
6.CA!

[Saka]

I like this game so here's a puzzle:

Code: Select all

x = 12, y = 12, rule = LifeHistory
3.C2$10.C$C5.C$6.C.C$.2C2.C$8.C2.C$.C4.2C2.C$.C$7.C$.C4.C$9.C!

[PHPBB12345]

I like this game so here's a puzzle:

Code: Select all

x = 12, y = 12, rule = LifeHistory
3.C2$10.C$C5.C$6.C.C$.2C2.C$8.C2.C$.C4.2C2.C$.C$7.C$.C4.C$9.C!

75, isn't optimal.

Code: Select all

x = 15, y = 16, rule = LifeHistory
4.AC$4.2A3.A$8.A.A.CA$.AC5.C.A.2A$.A2.A.A.C.C$3.2C.AC2.A$10.C.AC$3.C
4A2CA.CA$3.C3.A$A4.A3.C4A$3AC4ACA4.A$11.C2A$2.4A2.4A$2.A2.A2.A$9.A$8.
2A!

61:

Code: Select all

x = 15, y = 13, rule = LifeHistory
4.AC$4.2A3.A$8.A.A.CA$.AC5.C.A.2A$.A2.A.A.C.C$3.2C.AC2.A$10.C.AC$3.C
4A2CA.CA$3.C$2A.A.2A.AC4A$A.AC.2A.C5.A$11.C2A$11.A!

[dani]

Here's a 57, definitely suboptimal (although I haven't checked):

Code: Select all

x = 15, y = 13, rule = LifeHistory
4.AC$4.A.A5.2A$6.A5.CA$.AC3.A.CA$.A2.A.A.C.C$3.2C.AC2.A$10.C.AC$3.C4A
2C2.C$3.C8.A.A$2A.A.2A.AC3.2A$A.AC.2A.C$9.2AC$11.A!

[AforAmpere]

Here's 50:

Code: Select all

x = 14, y = 13, rule = LifeHistory
4.AC$4.2A$11.AC$.AC4.AC.A.A$.A2.A.A.C.C$3.2C.AC2.A$10.C.AC$3.CA.2A2C
2.C$3.C.2A5.A$2A.A5.C2A$A.AC4.C$9.2AC$11.A!

And a different 50:

Code: Select all

x = 14, y = 14, rule = LifeHistory
5.2A$5.CA2$11.AC$2.CA3.AC.A.A$2.A.A.A.C.C$3.2C.AC2.A$10.C.AC$3.CA.2A
2C2.C$3.C.2A5.A$2A.A5.C2A$A.AC4.C$9.2AC$11.A!

And another:

Code: Select all

x = 14, y = 14, rule = LifeHistory
4.2A$4.AC2$11.AC$2.CA3.AC.A.A$2.A2.A2.C.C$3.2C2AC2.A$10.C.AC$3.CA.2A
2C2.C$3.C.2A5.A$2A.A5.C2A$A.AC4.C$9.2AC$11.A!

[gmc_nxtman]

44:

Code: Select all

x = 14, y = 13, rule = LifeHistory
2.2A$2.AC2$9.AC$CA3.AC.A.A$A.A3.C.CA$.2C2.C$5.A.AC2AC$.CA3.2C2.C2.A$.
C10.2A$2.A3.AC$.CA3.C2.A$8.AC!

[wwei23]

Here's another 44:

Code: Select all

x = 12, y = 13, rule = LifeHistory
2.2A$2.AC2$5.2A2.AC$CA4.C3.A$A.A3.C.C$.2C2.CA.2A$5.A2.C2.C$.CA3.2C2.C
A$.C$2.A3.AC2.2A$.CA3.C.A2.A$9.CA!

Edit:
41:

Code: Select all

x = 12, y = 13, rule = LifeHistory
2.2A$2.AC2$5.2A2.AC$CA4.C3.A$A.A3.C.C$.2C2.CA.2A$5.A2.C2.C$.CA3.2C2.C
A$.C$2.A3.AC$.CA3.C2.A$8.AC!