Zendo, play by forum

[Ramon]

White koans:
  BEFT     * FT
  BELTF      LEFT
  BLEFT      LEMMINGF
  BUCKLE     LOVELY
  BUCKLES    RIGHT
* EFT        SUPERB
  FRUIT      UPWARD

Black koans:
  AURA      * EF
  BBBB        FEMMING
  BELT        FLEMMING
  BLELT       LELT
  BLEMMING    LEMMING
  BU          LEMMINGS
  BUBBLE      OCEAN
  BUCK      * UEUFUTU
  BUCKS       UP
  DOWN

(U*) and (BU*) is white for H I J Y (and black for every other letter)
(*), (**) and (***) is black for all letters

[Simon]

UUUUEFT
RFUTI
LEMMBING

-- Simon

[Ramon]

White koans:
  BEFT       LEFT
  BELTF      LEMMINGF
  BLEFT      LOVELY
  BUCKLE   * RFUTI
  BUCKLES    RIGHT
  EFT        SUPERB
  FRUIT      UPWARD
  FT       * UUUUEFT

Black koans:
  AURA        EF
  BBBB        FEMMING
  BELT        FLEMMING
  BLELT       LELT
  BLEMMING  * LEMMBING
  BU          LEMMING
  BUBBLE      LEMMINGS
  BUCK        OCEAN
  BUCKS       UEUFUTU
  DOWN        UP

(U*) and (BU*) is white for H I J Y (and black for every other letter)
(*), (**) and (***) is black for all letters

[Proxima]

BT
EFH
LEL

[WillLem]

Haha "LEMMBING"

[Ramon]

White koans:
  BEFT       LEFT
  BELTF      LEMMINGF
  BLEFT      LOVELY
  BUCKLE     RFUTI
  BUCKLES    RIGHT
  EFT        SUPERB
  FRUIT      UPWARD
  FT         UUUUEFT

Black koans:
  AURA        BUCK        LELT
  BBBB        BUCKS       LEMMBING
  BELT        DOWN        LEMMING
  BLELT       EF          LEMMINGS
  BLEMMING  * EFH         OCEAN
* BT          FEMMING     UEUFUTU
  BU          FLEMMING    UP
  BUBBLE    * LEL

(U*) and (BU*) is white for H I J Y (and black for every other letter)
(*), (**) and (***) is black for all letters

[Ramon]

If I were to give a hint, what sort of hint would you prefer? Insightful koans or a nudge toward the rule itself (or the exclusion of rule aspects)?

[WillLem]

Nudge towards the rule for me.

Maybe wait and see what others say as well; some players prefer to give it a bit longer before hints are involved.

[Proxima]

Maybe an insightful koan or two for now, and a bigger hint later if that turns out not to be enough?

[Ramon]

So I'm not actually sure how to give good koan examples without giving too much away, but here goes.

WE is white, and NO is black.

White koans:
  BEFT       LEMMINGF
  BELTF      LOVELY
  BLEFT      RFUTI
  BUCKLE     RIGHT
  BUCKLES    SUPERB
  EFT        UPWARD
  FRUIT      UUUUEFT
  FT       * WE
  LEFT

Black koans:
  AURA        BUCK        LELT
  BBBB        BUCKS       LEMMBING
  BELT        DOWN        LEMMING
  BLELT       EF          LEMMINGS
  BLEMMING    EFH       * NO
  BT          FEMMING     OCEAN
  BU          FLEMMING    UEUFUTU
  BUBBLE      LEL         UP

(U*) and (BU*) is white for H I J Y (and black for every other letter)
(*), (**) and (***) is black for all letters

[WillLem]

It seems to be something to do with letter pairings/alphabet position, but each time I think I've found something there's an existing koan that disproves it.

[Proxima]

EW
FE
HU
ON
PU
TB
TF
UB

[WillLem]

AB
BC
CD
DE
EF
FG
GH
HI
IJ
JK
KL
LM
MN
OP
PQ
QR
RS
ST
TU
UV
VW
WX
XY
XZ

[Ramon]

White koans:
  BEFT       FRUIT     * MN
  BELTF      FT        * OP
  BLEFT    * GH          RFUTI
  BUCKLE   * HU          RIGHT
  BUCKLES  * IJ          SUPERB
* CD       * JK        * TF
* DE       * KL          UPWARD
  EFT        LEFT        UUUUEFT
* EW         LEMMINGF    WE
* FG         LOVELY    * XZ

Black koans:
* AB          BUBBLE    * HI        * ON    UEUFUTU
  AURA        BUCK        LEL       * PQ    UP
  BBBB        BUCKS       LELT      * PU  * UV
* BC          DOWN        LEMMBING  * QR  * VW
  BELT      * EF          LEMMING   * RS  * WX
  BLELT       EFH         LEMMINGS  * ST  * XY
  BLEMMING  * FE        * LM        * TB
  BT          FEMMING     NO        * TU
  BU          FLEMMING    OCEAN     * UB

(U*) and (BU*) is white for H I J Y (and black for every other letter)
(*), (**) and (***) is black for all letters

[WillLem]

YZ

NOON
EON
WON
NOW
OWN