[sivm]

4. At dawn I stood east then northeast, counting by the clock; the rim's shadow wrote the hidden lin 5. First light, east to northeast. Copper grid in shadow. Sample on the beats. Write only what the l 6. Trust the clean edge, not the flicker; the mind finds patterns, but the edge alone reveals the me

Perhaps a 3D artist can model it and run some simulations with light.

[sivm]

Edit- I tried using poetry above to identify my own cribs and then used software to search and best I got for K4 is:

AT FIRST LIGHT FACE EAST. ALIGN WITH THE RIM SHADOW. READ EDGE TO EDGE TO FIND THE FINAL CODE.

You most certainly need to be there and k4 is instructions. I’m not sending the guy $50 to check my answer though

[sivm]

K5 is instructions something like: Head for the wall facing north; use the rim’s shadow as the clock. Berlin is the light.

So head north of it and use the shadows rim and 4/4/11/4 reveals and the Berlin clock sequence. Maybe on NOVEMBER NINE AT DAWN if you simulate it.

[sivm]

K6 is something like NOON HERE CENTER ON THE NORTH RIM; THEN READ THAT.

I don’t know if it ends.

[sivm]

Since nobody wants to play with me… if you have something beefier than my 386, you should have enough to finish. Remember it is always 5:55 somewhere- even in Berlin.

Partial answer: FACE EAST THEN NORTHEAST. LET THE BERLIN CLOCK CHOOSE; READ EDGE TO EDGE TO FIND THE FINAL CODE.

K4 可能由类 Vigenère 层加柏林钟的基5转置构成；我以已知 crib 为锚点，运行搜索，并利用 IC、χ² 与 n-gram 收敛到英文分布。

[sivm]

K4 changes it’s methodology DRASTICALLY and you must use clues like a riddle from previous solutions. The Morse code is the program to run. Make a mask from the unneeded E’s but don’t discard them, they clarify. Ignore the flicker see the edg-e. The grid becomes a compass with some work and be sure to normalize the directions. Caesar might help dispel the mist. Decoys abound in partial/incomplete solutions. One wrong turn and work disappears. My 386 was an abomination to the old man and he set traps- paper and pencil ruled his world.

NORTHWEST, EAST, NORTHEAST. BERLIN CLOCK TICKS EAST. READ EDGE TO EDGE; SEE TIME, USE THE NORTHEAST SHADOW. THE HIDDEN PLACE IS REVEALED.

Sorry for the bother

[sivm]

Here it is. It drove me crazy losing sleep

ATEQUINOXREADEDGETOEDEASTNORTHEASTFACETHENLETEDGEORDERBYTHERIMXBERLINCLOCKCHOOSEANDNAMETHEFINALCO

AT EQUINOX READ EDGE TO ED EAST, NORTHEAST FACE THEN LET EDGE ORDER BY THE RIM BERLIN CLOCK CHOOSE AND NAME THE FINAL CO

[schoen]

Did you share this with an audience that's actively working on Kryptos?