[Free]

For anyone interested in another NT structure, here's the FD code for HEEMAN. It's very easy to remember and has lots of possibilities. The only drawback is that it's not as known as keri or scanian, but it uses some of the same principles.

001N=NYYYYYY011-14 balanced
001NP2C=YYYYYYYB08puppet 2!d: weak with !d / 5+M inv+ / 6+M slam invite with good suit / 54+m weak or inv / 6+m slam invite
001NP2CP2D=NYYYYYYB08obligated
001NP2CP2DP2H=YYYYYYYA085+!s
001NP2CP2DP2HP2S=YYYYYYYB08obligated
001NP2CP2DP2HP2SP2N=NNNNYYN45!s332 or 5!s422
001NP2CP2DP2HP2SP3C=NYNNYYN4085!s and 4+!c
001NP2CP2DP2HP2SP3D=NNYNYYN4085!s and 4+!d
001NP2CP2DP2HP2SP3H=YYNNYYN7085!s and 4+!c
001NP2CP2DP2HP2SP3S=YNYNYYN7085!s and 4+!d
001NP2CP2DP2HP2SP3N=NNNNYYN25!s332 or 5!s422
001NP2CP2DP2HP2SP4C=YNNNYNN701good 6+!s, splinter
001NP2CP2DP2HP2SP4D=YNNNYNN701good 6+!s, splinter
001NP2CP2DP2HP2SP4H=YNNNYNN708RKC !s
001NP2CP2DP2HP2SP4S=NNNNYYN768good suit
001NP2CP2DP2HP2SP4N=NNNNYYN75!s332, quantitative
001NP2CP2DP2S=YYYNNYND0854+m inv / 6+m slam invite
001NP2CP2DP2SP2N=NYYNNYNEminimum
001NP2CP2DP2SP2NP3C=NYNNNNN158
001NP2CP2DP2SP2NP3D=NNYNNNN158
001NP2CP2DP2SP2NP3H=YYNNNYN7086+!c
001NP2CP2DP2SP2NP3S=YNYNNYN7086+!d
001NP2CP2DP2SP3C=NYYNNYNE08maximum, !c better than !d
001NP2CP2DP2SP3CP3H=YYNNNYN7086+!c
001NP2CP2DP2SP3CP3S=YNYNNYN7086+!d
001NP2CP2DP2SP3CP3N=NNNNNYN1
001NP2CP2DP2SP3D=NYYNNYNE08maximum, !d better than !c
001NP2CP2DP2SP3DP3H=YYNNNYN7086+!c
001NP2CP2DP2SP3DP3S=YNYNNYN7086+!d
001NP2CP2DP2SP3DP3N=NNNNNYN1
001NP2CP2DP2N=YNNYNYN45!h332 or 5!h422
001NP2CP2DP3C=NYNYNYN4085!h and 4+!c
001NP2CP2DP3D=NNYYNYN4085!h and 4+!d
001NP2CP2DP3H=YYNYNYN7085!h and 4+!c
001NP2CP2DP3S=YNYYNYN7085!h and 4+!d
001NP2CP2DP3N=NNNYNYN25!h332 or 5!h422
001NP2CP2DP4C=YNNYNNN701good 6+!h, splinter
001NP2CP2DP4D=YNNYNNN701good 6+!h, splinter
001NP2CP2DP4H=NNNYNNN768good suit
001NP2CP2DP4S=NNNYNYN708Kickback RKC !h
001NP2CP2DP4N=NNNYNYN75!h332, quantitative
001NP2D=YYYYYYYA08transfer !h: weak 5+!h / 4+!h inv+ / 6+!h slam invite with poor suit / 4-4-4-1
001NP2DP2H=NYYYYYY008no good 4!h
001NP2DP2HP2S=YYYYYYN5084+!s and 4+!h
001NP2DP2HP2SP2N=NYYYYYN2min, no 4M
001NP2DP2HP2SP2NP3D=YNNYYYNA085+!h
001NP2DP2HP2SP2NP3DP3H=NNNYYYN008obligated
001NP2DP2HP2SP2NP3DP3HP3S=NNNYYYN6085!h and 5!s
001NP2DP2HP2SP2NP3DP3HP3N=NNNYYYN65!h and 4!s
001NP2DP2HP2SP2NP3DP3HP4C=YNNYNYN8086!h and 4!s
001NP2DP2HP2SP2NP3DP3HP4D=YNNYNYN8086!h and 4!s
001NP2DP2HP2SP2NP3DP3HP4H=NNNYNYN7086+!h and 4!s
001NP2DP2HP2SP2NP3DP3HP4S=YNNYNYN708Kickback RKC !h
001NP2DP2HP2SP2NP3H=YNNYYYNA085+!s
001NP2DP2HP2SP2NP3HP3S=NNNYYYN008obligated
001NP2DP2HP2SP2NP3HP3SP3N=NNNYYYN65!s and 4!h
001NP2DP2HP2SP2NP3HP3SP4C=YNNYYYN8086!s and 4!h
001NP2DP2HP2SP2NP3HP3SP4D=YNNYYYN8086!s and 4!h
001NP2DP2HP2SP2NP3HP3SP4S=NNNNYYN7086!s and 4!h
001NP2DP2HP2SP2NP3HP3SP4N=YNNNYYN7RKC !s
001NP2DP2HP2SP2NP3S=YNYYYYN6084-4-4-1
001NP2DP2HP2SP2NP3N=NNNNNYN1
001NP2DP2HP2SP2NP4H=NNNYNNN168
001NP2DP2HP2SP2NP4S=NNNNYNN168
001NP2DP2HP2SP3C=YNNYYYN608max (4M possible)
001NP2DP2HP2SP3CP3D=YNNYYYNA085+!h
001NP2DP2HP2SP3CP3DP3H=NNNYYYN008obligated
001NP2DP2HP2SP3CP3DP3HP3S=NNNYYYN6085!h and 5!s
001NP2DP2HP2SP3CP3DP3HP3N=NNNYYYN65!h and 4!s
001NP2DP2HP2SP3CP3DP3HP4C=YNNYYYN8086!h and 4!s
001NP2DP2HP2SP3CP3DP3HP4D=YNNYYYN8086!h and 4!s
001NP2DP2HP2SP3CP3DP3HP4H=NNNYNYN7086+!h and 4!s
001NP2DP2HP2SP3CP3DP3HP4S=YNNYNYN708Kickback RKC !h
001NP2DP2HP2SP3CP3H=YNNYYYNA085+!s
001NP2DP2HP2SP3CP3HP3S=NNNYYYN008obligated
001NP2DP2HP2SP3CP3HP3SP3N=NNNYYYN65!s and 4!h
001NP2DP2HP2SP3CP3HP3SP4C=YNNYYYN8086!s and 4!h
001NP2DP2HP2SP3CP3HP3SP4D=YNNYYYN8086!s and 4!h
001NP2DP2HP2SP3CP3HP3SP4S=NNNNYYN7086!s and 4!h
001NP2DP2HP2SP3CP3HP3SP4N=YNNNYYN7RKC !s
001NP2DP2HP2SP3CP3S=YNYYYYN6084-4-4-1
001NP2DP2HP2SP3CP3N=NNNNNYN1
001NP2DP2HP2SP3CP4H=NNNYNNN168
001NP2DP2HP2SP3CP4S=NNNNYNN168
001NP2DP2HP2SP3H=NNNYNYN248min, 4!h
001NP2DP2HP2SP3S=NNNNYYN248min, 4!s
001NP2DP2HP2N=NYYYNYN44!h (semi)balanced
001NP2DP2HP3C=NYNYNYN4584!h and 5+!c
001NP2DP2HP3D=NNYYNYN4584!h and 5+!d
001NP2DP2HP3H=YYNYNYN7084!h and 5+!c
001NP2DP2HP3S=YNYYNYN7084!h and 5+!d
001NP2DP2HP3N=NNNYNYN24!h, balanced
001NP2DP2HP4C=YNNYNNN701poor 6+!h, splinter
001NP2DP2HP4D=YNNYNNN701poor 6+!h, splinter
001NP2DP2HP4H=NNNYNNN768poor suit
001NP2DP2HP4N=NYYYNYN24!h333, quantitative
001NP2DP2S=YYYYYYY008good 4!h, !sxx/Ax/Kx
001NP2DP2N=YYYYYYY0good 4!h, min, no doubleton xx/Ax/Kx
001NP2DP3C=YYYYYYY008good 4!h, !cxx/Ax/Kx
001NP2DP3D=YYYYYYY008good 4!h, !dxx/Ax/Kx
001NP2DP3H=NYYYYYY008good 4!h, max, no doubleton xx/Ax/Kx
001NP2H=YYYYYYYA08transfer !s: weak 5+!s / 4+!s inv+ / 6+!s slam invite with poor suit
001NP2HP2S=NYYYYYY008no good 4!s
001NP2HP2SP2N=NYYNYYN44!s (semi)balanced
001NP2HP2SP3C=NYNNYYN4584!s and 5+!c
001NP2HP2SP3H=YYNNYYN7084!s and 5+!c
001NP2HP2SP3S=YNYNYYN7084!s and 5+!d
001NP2HP2SP3N=NNNNYYN24!s, balanced
001NP2HP2SP4C=YNNNYNN701poor 6+!s, splinter
001NP2HP2SP4D=YNNNYNN701poor 6+!s, splinter
001NP2HP2SP4S=NNNNYNN768poor suit
001NP2HP2SP4N=NYYNYYN24!s333, quantitative
001NP2HP2SP3D=NNYNYYN4084!s and 5+!d
001NP2HP2S3D=NNYYNYN4584!s and 5+!d
001NP2HP2N=YYYYYYY0good 4!s, min, no doubleton xx/Ax/Kx
001NP2HP3C=YYYYYYY008good 4!s, !cxx/Ax/Kx
001NP2HP3D=YYYYYYY008good 4!s, !dxx/Ax/Kx
001NP2HP3H=YYYYYYY008good 4!s, !hxx/Ax/Kx
001NP2HP3S=NYYYYYY008good 4!s, max, no doubleton xx/Ax/Kx
001NP2S=YYYYYYYD08asks min/max: weak with !c / balanced invite without 4+M / slam invite with 54+m or balanced
001NP2SP2N=YYYYYYNEminimum
001NP2SP2NP3C=NYNNNNN158weak with !c
001NP2SP2NP3D=YYYYYYY708"CONFIT": asks controls and search fit
001NP2SP2NP3DP3H=YYYYYYNE082-3 controls
001NP2SP2NP3DP3S=YYYYYYNE084 controls
001NP2SP2NP3DP3N=YYYYYYNE5 controls
001NP2SP2NP3DP4C=YYYYYYNE086 controls
001NP2SP2NP3H=YYYYYYY7085!c and 4+!d
001NP2SP2NP3S=YYYYYYY7085!d and 4+!c
001NP2SP2NP3N=NNNNNYN1
001NP2SP3C=YYYYYYNE08maximum
001NP2SP3CP3D=YYYYYYY708"CONFIT": asks controls and search fit
001NP2SP3CP3DP3H=YYYYYYNE082-3 controls
001NP2SP3CP3DP3S=YYYYYYNE084 controls
001NP2SP3CP3DP3N=YYYYYYNE5 controls
001NP2SP3CP3DP4C=YYYYYYNE086 controls
001NP2SP3CP3H=YYYYYYY7085!c and 4+!d
001NP2SP3CP3S=YYYYYYY7085!d and 4+!c
001NP2SP3CP3N=NNNNNYN1
001NP2N=YYYYYYYDasks weak doubleton: usually 6+m invite or slam invite
001NP2NP3C=YYYYYYY222!cJx or less
001NP2NP3D=YYYYYYY222!dJx or less
001NP2NP3H=YYYYYYY222!hJx or less
001NP2NP3S=YYYYYYY222!sJx or less
001NP2NP3N=NYYYYYN2at least Qx or xxx in every suit
001NP3C=YYYYYYYB08puppet 3!d: weak with !d / GF 4441 with 4!c
001NP3CP3D=YYYYYYY008obligated
001NP3CP3DP3H=YYYNYYN6014-1-4-4
001NP3CP3DP3S=YYYYNYY6011-4-4-4
001NP3CP3DP3N=YYNYYYY24-4-1-4
001NP3D=YNNYYYN408'multi-invite': inv with 6+M
001NP3DP3H=YNNYYYN228no interest in !h
001NP3DP3HP3S=NNNNYYN468
001NP3DP3HP3SP3N=NNNNYYN2suggestion to play
001NP3DP3HP3SP4S=NNNNYNN128
001NP3DP3S=YNNYYYN228interest in !h, not in !s
001NP3DP3N=NNNYYYN2accepts invite, NF, responder may bid 4M
001NP3DP4H=YNNYYNN228accepts invitation in !h and !s, responder passes with !h or bids 4!s
001NP3H=YYYNYYN6080-1!h, 3!s, 54+m
001NP3HP3N=NNNNNYN1
001NP3HP4C=NYYNYYN245
001NP3HP4D=NYYNYYN245
001NP3HP4H=YYYNYYND08asks 5 card m
001NP3HP4S=NNNNYNN148
001NP3S=YYYYNYN6080-1!s, 3!h, 54+m
001NP3SP3N=NNNNNYN1
001NP3SP4C=NYYNYYN245
001NP3SP4D=NYYNYYN245
001NP3SP4H=NNNYNNN148
001NP3SP4S=YYYNYYND08asks 5 card m
001NP3N=NYYYYYY1
001NP4C=YYYYYYYD08Gerber
001NP4D=YNNYNNNA086+!h, no slamtry
001NP4H=YNNNYNNA086+!s, no slamtry
001NP4S=YYYNNNN0085+!d and 5+!c, no slamtry
001NP4N=NYYYYYY7Quantitative
001NP5C=NYNNNNN168
001NP5D=NNYNNNN168