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21$-62 – Index to Rollouts – Updated 2015-Feb-19.txt

Posted By: Taper_Mike
Date: Thursday, 19 February 2015, at 7:37 a.m.

In Response To: 21$-62, 4-ply extension (Nack Ballard)


2O ' ' '1X4X '3X ' '1X5O

2X ' ' ' '5O '3O ' ' '4X
XGID=-b----E-C---dEa--c-da---B-:0:0:1:62:0:0:3:0:10

21$-62   [S &7 Z9]   "^62

Key: S = Split [24/18, 13/11], & = Double-slot [13/7, 6/4], Z = Reverse-split [24/22, 13/7]

Nack’s extension to 62k of the 4-ply rollout by Neil is the best we now have for this famous position. For money, S beats & and Z, respectively, by 0.007 and 0.009. Last year, David Rockwell rolled out this position at every score in a 5-point match. I created the table below to present his data. It is eye-opening to see how often & is best. Detailed information for all the rollouts I have on file is presented below.

Mike

21$-62 at Every Score in a 5-point Match
  –c –p –2 –3 –4 –5 –n
–c — — Gammon Save
& Z2 $10 S13
S Z10 &14 R14 U16 & S1 Z2 S Z8 &11 —
–p — Double Match Point
S &6 Z12
Too good to double
& D12 $20 Z20 S23
After double/take,
–p–3 plays like GS
&=S=Z=D=$=R=U Z=S R5 &9 —
–2 Gammon Go
& D10 Z16 S17 $18
After double/take,
–2–p plays like DMP
After double/take,
–2–2 plays like DMP
& Z11 S15 & Z11 S37 Z &7 S22 —
–3 S &5 Z13 After double/take,
–3–p plays like GG
& S22 Z31 & S7 Z14 & Z1 D21 S21 Z S14 &15 —
–4 & S8 D11 Z14 & D7 $12 Z16 S19 & D27 $28 Z43 & S21 $22 Z24 D25 & Z5 S19 Z S2 &3 —
–5 S &5 Z12 & S11 D11 Z16 & D16 $24 S31 Z34 & S11 D12 Z22 & Z8 D13 S13 Z=& S3 —
–n — — — — — — S Z9 &11

Key: $ = Slot [13/5], & = Double slot = N = Near [13/7 6/4], D = Down [13/9 13/7], R = Run [24/16], S = Split [24/18 13/11],
U = Up [24/22 24/18], Z = Reverse split [24/22 13/7]

Nactation Tutorial • Explanation of nacbracs

Notes:

  1. The –n rollout is a money rollout, made with neither the Jacoby Rule nor beavers. It is the same as a match that is tied at infinity-away. As such, it is the closest we will come to a “normal match score,” i.e., one that is not influenced by the proximity of the finish line.
  2. The –n rollout was made by me. All other rollouts are by David Rockwell.
  3. The score of the player on roll is given along the side in the first column. The score of his opponent is given in the top row.
  4. –c means 1-away, Crawford.
  5. –p means 1-away, post-Crawford.

21$-62 — Unlimited Games
Bot Seed Equity Nacbracs Link
[Bot Aggregate] [Not posted] [Not posted] [S Z6 &11] a [Aggregate]
GnuBg 0.xx 2-ply [Stick 46k + Stick 46k + Stick 5k] –289.1 [Z &1 S2 $19 D27 R32] /46**5 BgOnline.org
GnuBg 0.xx 2-ply [Stick 46k + Stick 46k + Stick 5k] –289.1 [Z S2 &3 $19 D27 R32] /46*93 5 [GnuBg Aggregate]
GnuBg 0.xx 2-ply 1073706349 –307.7 [$] /5 Stick
GnuBg 0.xx 2-ply 982761661 –290.5 [& D26 R31] /46 5 Stick
GnuBg 0.xx 2-ply 983289024 –289.1 [Z S2 &5] /46 Stick
Jellyfish [Not posted] [Not posted] [S Z11 $11 D14 R14 &16 U30] — Jellyfish, 7200 trials [Unknown]
Snowie 4.x.x 3-ply [Not posted] [Not posted] [S Z10 &19 $22 D22 R13 U31 W72] ~56*****20 5 [Snowie Aggregate]
Snowie 4.x.x 3-ply, Cubeful (not Live Cube) [Not posted] [Not posted] [Z S5 &7] ~41 — Cubeful; not Live Cube [Snowie Aggregate]
Snowie 4.x.x 3-ply Trunc [Not posted] [Not posted] [Z S3 &7] ~t Nack Ballard
Snowie 4.x.x 3-ply [Random seed] –295 [Z=S &14] ~5 BgOnline.org
XG 1.xx 3-ply [Not posted] [Not posted] [S &10 Z11] '<15 Nack Ballard
XG 1.xx 3-ply [Not posted] [Not posted] [S Z10 &12 $21 D26 R28 U43] '<62**31 Nack Ballard
XG 1.xx 3-ply, MET: Rockwell-Kazaross 1 –297.5 [S Z5] '<5 Dmitriy Obukhov
XG 1.12 4-ply 1 –292 [S Z9 &15 D20 R36] '^19*7 5 2 Neil Kazaross
XG 2.xx 3-ply 22080951 –289.0 [S Z9 &15 D22 $26 R31 U44] "<62**31*15 10 David Rockwell
XG 2.00 3-ply 6828926 –280.3 [S &20 Z23 D30 R39 $45 U46] "<5 10 5 Chris Yep
XG 2.10.192.pre-release 4-ply 78623594 –290.9 [S &7 Z9 D18 R28] "^32*15 5 Neil Kazaross
XG 2.10 4-ply S&ZDR: 78623594, $U: 99915126 –219.3 [S &7 Z9 D20 $21 R25 U45] "^62**20*10 5 Nack Ballard
XG 2.10 XGR+ 76175803 –292 [S Z7 &12 D28 $31 R35] "+1 Stick
XG 2.10 3-ply 35637723 –291.6 n[S &9 Z12 D24] "<33**5 David Rockwell
XG 2.00 3-ply, Cubes: XGR 1 –295.4 n[S Z8 &9] "<=13 Grant Hoffman
XG 2.10 3-ply, Cubes: XGR 90948691 –291.5 n[S Z9 &11 $22 D28 R29 U49] "<=62**20**5 Taper_Mike
XG 2.10 XGR++ Eval [XGR++ seed] –289.3 n[S Z10 &20 D21 $26 R29 U43] "&e Taper_Mike

21$-62 — Double Match Point
Bot Seed Equity Nacbracs Link
GnuBg 0.xx 2-ply 824068618 –114.554 d[S &9 Z10] /10 Stick
XG 1.xx 3-ply [Not posted] [Not posted] d[S &7 Z11 D17 U18 R18 $20] '<31*25 15**10 David Rockwell
XG 2.03 3-ply, MET: Kazaross XG2 7557664 –114.5 d[S &7 R16 D16 Z17 $18 U21] "<15*2 Miran Tuhtan
XG 2.xx 3-ply, MET: Rockwell-Kazaross 80274407 –116.0 d[S &6 Z12 D18 R18 U19 $21] "<31*20 15**10 David Rockwell
XG 2.01 3-ply, Cubes: XGR 741976 –114.9 d[S &7 Z14 R18 U23] "<=10 Tommy Nesbakk

21$-62 — Gammon Go
Bot Seed Equity Nacbracs Link
GnuBg 0.xx 2-ply 810512563 +127.323 g[D &1 Z6 $13 S14] /5 Stick
XG 1.xx 3-ply 1 +121.8 g[& S10 D12 Z13 $14] '<8 Kye Hedlund
XG 2.xx 3-ply, MET: Rockwell-Kazaross 94959920 +127.7 g[& D10 Z16 S17 $18 R54] "<31*20**5 David Rockwell
XG 2.01 3-ply, Cubes: XGR 741976 +128.1 g[& D10 Z18 S18 $20] "<=17 Tommy Nesbakk

21$-62 — Gammon Save
Bot Seed Equity Nacbracs Link
GnuBg 0.xx 2-ply 813904730 –498.081 s[Z S13] /10 David Rockwell
XG 2.xx 3-ply, MET: Rockwell-Kazaross 17572190 –500.1 s[& Z2 $10 S13 D15 R23 U36] "<31****15 10 David Rockwell
XG 2.01 3-ply, Cubes: XGR 741976 –500.4 s[& Z2 $10 S13 D15 R22] "<=46*9 Tommy Nesbakk

21$-62 — According to Score
Bot Seed Equity Nacbracs Link
XG 2.10 3-ply, MET: Rockwell-Kazaross 92349795 –544.4 –2–3 [& Z11 S15 $31 D37] "<20*10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 99934915 –556.4 –2–3 [Z S11 $20 D26 R32] "<20*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 66391336 –753.7 –2–4 [& Z11 S37 D37 $40] "<31*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 66391336 –767.0 –2–4 [Z S23] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 92278015 –464.9 –2–5 [Z &7 S22 R30 $37 D37 U40] "<31*10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 92278015 –469.0 –2–5 [Z S18 R26 $33 D33 U36] "<10*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 63763688 –90.2 –3–2 [& S22 Z31] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 62434445 –333.1 –3–3 [& S7 Z14] "<31*10 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 18921844 –509.0 –3–4 [& Z1 D21 S21 $31] "<31*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 18459753 –422.5 –3–5 [Z S14 &15 R29 $32 D34] "<10**5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 55819423 –96.2 –3–c [S &5 Z13 D16 R19 $20 U26] "<20*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 97622529 +57.3 –4–2 [& D27 $28 Z43 S49] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 97622529 +57.3 –4–2 [& S49] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 80991453 –158.9 –4–3 [& S21 $22 Z24 D25] "<15*10 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 6830601 –356.5 –4–4 [& Z5 S19 D31 $38 R54] "<31*10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 69561348 –294.4 –4–5 [Z S2 &3 $19 D23 R31] "<31**10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 27405465 +8.8 –4–c [& S8 D11 Z14 $17 R36 U38] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 79962232 +140.0 –4–p [& D7 $12 Z16 S19 R50] "<15*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 77265805 –129.4 –5–2 [& D16 $24 S31 Z34] "<10*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 12974036 –165.1 –5–3 [& S11 D12 Z22 $27] "<20**5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 65498978 –375.4 –5–4 [& Z8 D13 S13 $23] "<31*15*10 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 28968604 –312.8 –5–5 [Z=& S3 $12 D13 R25] "<31**10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 85350710 –99.0 –5–c [S &5 Z12 D17 $18 R22 U22] "<15*5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 84993156 +38.0 –5–p [& S11 D11 Z16 $21] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 61914162 –149.3 –c–3 [S Z10 &14 R14 U16 D22 $26] "<5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 26043632 –323.2 –c–4 [& S1 Z2 D10 $11 R14 U21] "<31**5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 95092503 –146.7 –c–5 [S Z8 &11 R14 U19 D20 $22] "<10**5 David Rockwell
XG 2.10 3-ply, ND&D, MET: Rockwell-Kazaross 72318507 –1016.5 –p–2 [& D12 $20 Z20 S23 R39 U57] "<10*5 David Rockwell
XG 2.10 3-ply, ND&D, MET: Rockwell-Kazaross 17086329 –1000.0 –p–4 [&=S=Z=D=$=R=U] "<1 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 15000016 –419.5 –p–5 [Z=S R5 &9 U14 $16 D23] "<31*10 5 David Rockwell
XG 2.10 3-ply, MET: Rockwell-Kazaross 15000016 –419.5 –p–5 [Z=S R5 U14 $16 D23] "<31*10 5 David Rockwell

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