I stumbled across this http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=700 from a recent post and thought I'd contribute a few more results. I am unsure who tracks/updates this list.

71B/FORTH (about 3x faster than 71B/BASIC, faster than 50g UserRPL):

Output:

S=876 IN 46.27 SEC

Code:

: NQUEENSF ;

FVARIABLE TIMER

: STARTTIMER CLOCK TIMER STO ;

: DISPLAYTIMER CLOCK TIMER RCL F- STD F. ." SEC" ;

8 CONSTANT RR

VARIABLE SS

VARIABLE XX

VARIABLE YY

CREATE AA RR 1 + ALLOT

: RCLAA @ 2 * AA + C@ ;

: STOAA @ 2 * AA + C! ;

: NQCORE

  0 SS !

  0 XX !

  BEGIN

    1 XX +! RR XX STOAA

    BEGIN

      1 SS +!

      XX @ YY !

      BEGIN YY @ 1 > WHILE

        -1 YY +!

        XX RCLAA YY RCLAA - DUP

        0 = SWAP ABS XX @ YY @ - = OR IF

          0 YY !

          BEGIN XX RCLAA 1 - DUP XX STOAA 0 = WHILE

            -1 XX +!

          REPEAT

        THEN

      REPEAT

    YY @ 1 = UNTIL

  RR XX @ = UNTIL

;

: NQUEENS

  STARTTIMER

  NQCORE

  ." S=" SS @ . ." IN "

  DISPLAYTIMER CR

;

71B/RPN (HP41 emulator, about 4x faster than 41CX):

Output:

S=876 IN 269.87 SEC

Code:

LBL "NQ41"

FIX 0

CLRG

TIME

HR

STO 12

8

STO 11

LBL 00

RCL 00

RCL 11

X=Y?

GTO 04

ISG 00

DEG

STO IND 00

LBL 01

ISG 10

DEG

RCL 00

STO 09

LBL 02

DSE 09

DEG

RCL 09

X=0?

GTO 00

RCL IND 00

RCL IND 09

-

X=0?

GTO 03

ABS

RCL 00

RCL 09

-

X#Y?

GTO 02

LBL 03

DSE IND 00

GTO 01

DSE 00

GTO 03

LBL 04

"S="

ARCL 10

"} IN "

TIME

HR

RCL 12

-

3600

*

FIX 02

ARCL X

"} SEC"

AVIEW

RTN

Thank you for testing. The list was updated with your interesting results.