Bg Openings

Front 1

Back 1

1 R 24/20 13/8 eq:-0.266
2 R 13/9 13/8 eq:-0.307 (-0.040)
3 R 24/15 eq:-0.320 (-0.053)

Front 2

Back 2

1 R 13/9 6/5 eq:-0.128
2 R 24/23 13/9 eq:-0.184 (-0.057)
a. MOTIVATION to split is less with a fourth guy on the 8-point.
b. MOTIVATION to split is more with a loose blot on the outfield.

Front 3

Back 3

1 R 24/21 13/11 eq:-0.278
2 R 6/1* eq:-0.295 (-0.017)
3 R 13/11 8/5 eq:-0.308 (-0.030)

Front 4

Back 4

1 R 24/21 13/7* eq:-0.002
2 R 13/10 13/7* eq:-0.045 (-0.043)
When your opponent splits with an opening 6X [62 63 64] and you reply with a hitting 6X [62 63 64] you should play the other number (the non six) by splitting the back checkers

Front 5

Back 5

1 R 13/11 8/7* eq:-0.117
2 R 24/22 8/7* eq:-0.131 (-0.015)
When your opponent splits with an opening 6X [62 63 64] and you reply with a hitting 6X [62 63 64] you should play the other number (the non six) by splitting the back checkers

Front 6

Back 6

1 R 8/5 6/5 eq:-0.066
2 R 13/10 8/7* eq:-0.113 (-0.046)
3 R 24/21 8/7* eq:-0.126 (-0.060)
Always hit blot in your outer board.
a. Exceptions: 31P is usually better than hitting but not always.)

Front 7

Back 7

1 R 13/11 6/5 eq:-0.160
2 R 24/23 13/11 eq:-0.224 (-0.065)
Slot with 21$, 41$, and 51$ unless your opponent has split his back checkers or has made an inner board point.

Front 8

Back 8

1 R 24/22 6/1* eq:-0.205
2 R 24/22 13/8 eq:-0.261 (-0.056)
Hitting loose on the ace as a tempo play. Only when you roll a bad 5 against 6X, or in case of 41S-54.

Front 9

Back 9

1 R 13/11 13/8 eq:-0.141
2 R 13/8 6/4 eq:-0.166 (-0.025)
3 R 24/22 13/8 eq:-0.170 (-0.029)
Mirror your opponent's play.

Front 10

Back 10

1 R 24/21 eq:-0.205
2 R 13/11 6/5 eq:-0.230 (-0.024)
3 R 24/22 6/5 eq:-0.232 (-0.027)

Front 11

Back 11

1 R 13/9 6/5 eq:-0.175
2 R 24/23 13/9 eq:-0.217 (-0.041)
Slot with 21$, 41$, and 51$ unless your opponent has split his back checkers or has made an inner board point.

Front 12

Back 12

1 R 13/7* eq:-0.074
2 R 8/7* 6/1* eq:-0.107 (-0.033)
gg is

Front 13

Back 13

1 R 13/7 8/7 eq:-0.099
2 R 13/7 6/5* eq:-0.145 (-0.046)
3 R 24/18 6/5* eq:-0.162 (-0.064)
gg is (even)

Front 14

Back 14

1 R 8/2 6/2 eq:-0.188
2 R 24/14 eq:-0.234 (-0.046)
dmp even, egyébként mindnél ez
Make a point with 6-4 if opponent splits to 4pt or 5pt and you miss

Front 15

Back 15

1 R 24/21 13/7 eq:-0.174
2 R 24/18 13/10 eq:-0.196 (-0.022)
3 R 24/21 24/18 eq:-0.205 (-0.031)
4 R 13/4 eq:-0.221 (-0.047)

Front 16

Back 16

1 R 13/9 6/3* eq:-0.116
2 R 24/20 6/3* eq:-0.119 (-0.003)
3 R 24/21 24/20 eq:-0.162 (-0.046)
4 R 24/20 13/10 eq:-0.179 (-0.063)
It is often right to hit loose even against the minor splits (to the 3 or 2 point). Again, this rule would only apply to "non-constructive" rolls (not doubles, not a point, not a better hit).

Front 17

Back 17

1 R 24/22 13/10 eq:-0.368
2 R 24/21 13/11 eq:-0.377 (-0.009)
3 R 24/22 24/21 eq:-0.390 (-0.022)
4 R 13/11 13/10 eq:-0.405 (-0.037)
If the opponent makes his five-point, split your back checkers to try for an advanced anchor.

Front 18

Back 18

1 R 13/7 6/4* eq:-0.085
2 R 24/18 13/11 eq:-0.113 (-0.028)
3 R 24/18 6/4* eq:-0.133 (-0.047)
4 R 24/16 eq:-0.157 (-0.071)
gondolom az ellenfél jó 6osai miatt le.

Front 19

Back 19

1 R 24/20 8/5* eq:-0.130
2 R 13/9 8/5* eq:-0.144 (-0.015)
3 R 8/5* 5/1* eq:-0.167 (-0.037)

Front 20

Back 20

1 R 24/16 eq:-0.118
2 R 24/18 13/11 eq:-0.155 (-0,037)

51S-63 --- 2 R 24/18 13/10 (-0,048)

Front 21

Back 21

1 R 13/11 6/5 eq:-0.094
2 R 24/23 13/11 eq:-0.160 (-0.066)
3 R 13/10 eq:-0.162 (-0.068)
4 R 24/21 eq:-0.179 (-0.085)
Slot with 21$, 41$, and 51$ unless your opponent has split his back checkers or has made an inner board point.

Front 22

Back 22

1 R 24/15 eq:-0.148
2 R 24/18 13/10 eq:-0.167 (-0.019)
3 R 13/7 6/3* eq:-0.177 (-0.029)
4 R 24/18 6/3* eq:-0.212 (-0.064)

Front 23

Back 23

1 R 13/8 eq:-0.180
2 R 24/23 24/20 eq:-0.186 (-0.006)
3 R 8/3* eq:-0.223 (-0.043)
4 R 24/23 13/9 eq:-0.236 (-0.056)
41 Tower (13/8) is only correct against 52S.

Front 24

Back 24

1 R 24/21 8/7* eq:-0.107
2 R 8/5 6/5 eq:-0.108 (-0.002)
3 R 13/10 8/7* eq:-0.139 (-0.032)
Always hit blot in your outer board. Exceptions: 31P is usually better than hitting but not always.
i. 64S-31. hit
ii. split 24/21, 8/7* trumps the 5-point. (Note the power of the 9-point builder)

Front 25

Back 25

1 R 24/21 6/2* eq:-0.132
2 R 24/21 13/9 eq:-0.133 (-0.001)
3 R 13/10 13/9 eq:-0.149 (-0.017)
4 R 24/20 13/10 eq:-0.151 (-0.019)
5 R 24/21 24/20 eq:-0.157 (-0.025)
It is often right to hit loose even against the minor splits (to the 3 or 2 point). Again, this rule would only apply to "non-constructive" rolls (not doubles, not a point, not a better hit).

Front 26

Back 26

1 R 24/21 6/2* eq:-0.128
2 R 24/21 13/9 eq:-0.161 (-0.033)
3 R 13/10 13/9 eq:-0.172 (-0.043)
4 R 24/20 13/10 eq:-0.174 (-0.046)
Hit and split 24/21, 6/2*

Front 27

Back 27

1 R 13/3* eq:-0.139
2 R 24/14 eq:-0.165 (-0.026)
3 R 24/18 13/9 eq:-0.179 (-0.040)
It is often right to hit loose even against the minor splits (to the 3 or 2 point). Again, this rule would only apply to "non-constructive" rolls (not doubles, not a point, not a better hit).

Front 28

Back 28

1 R 13/5* eq:-0.097
2 R 8/3 6/3 eq:-0.172 (-0.075)
You refrain from making a point, and hit loose instead on certain 53 positions

Front 29

Back 29

1 R 24/18 6/5* eq:-0.148
2 R 13/7 8/7 eq:-0.152 (-0.004)
3 R 13/7 6/5* eq:-0.160 (-0.012)
You refrain from making a point, and hit loose instead on certain 61 positions

Front 30

Back 30

1 R 13/5* eq:-0.115
2 R 8/3 6/3 eq:-0.124 (-0.009)
3 R 24/21 13/8 eq:-0.136 (-0.021)
You refrain from making a point, and hit loose instead on certain 53 positions

Front 31

Back 31

1 R 13/5* eq:-0.096
2 R 8/3 6/3 eq:-0.137 (-0.042)
3 R 24/21 13/8 eq:-0.159 (-0.064)
You refrain from making a point, and hit loose instead on certain 53 positions

Front 32

Back 32

1 R 24/14 eq:-0.210
2 R 8/2 6/2 eq:-0.224 (-0.015)
3 R 24/18 8/4* eq:-0.241 (-0.032)
4 R 13/7 8/4* eq:-0.249 (0.040)
43Z-64. Running 24/14 is better than hitting loose or making the 2-point

Front 33

Back 33

1 R 24/20 6/1* eq:-0.164
2 R 24/20 13/8 eq:-0.196 (-0.032)
3 R 24/15 eq:-0.238 (-0.073)
4 R 13/4 eq:-0.242 (-0.077)
Hitting loose on the ace as a tempo play. Only when you roll a bad 5 against 6X, or in case of 41S-54.

Front 34

Back 34

1 R 24/20 8/5* eq:-0,110
2 R 8/5* 8/4* eq:-0,130 (-0,021)
3 R 24/21 8/4* eq:-0,142 (-0,033)

Front 35

Back 35

1 R 24/20 13/8 eq:-0,118
2 R 24/15 eq:-0,124 (-0,006)
3 R 13/9 13/8 eq:-0,152 (-0,035)
4 R 13/8 6/2* eq:-0,162 (-0,044)
5 R 24/20 6/1* eq:-0,167 (-0,049)

Front 36

Back 36

1 R 24/23 8/4* eq:-0,175
2 R 8/4* 4/3 eq:-0,222 (-0,048)
3 R 24/23 24/20 eq:-0,224 (-0,049)
4 R 13/8 eq:-0,239 (-0,064)

Front 37

Back 37

1 R 24/20* 13/8 eq:+0,195
P: 53,57% (G:18,23% B:1,33%)
O: 46,43% (G:11,94% B:0,51%)
2 R 24/20* 20/15 eq:+0,165 (-0,030)
P: 53,57% (G:16,17% B:1,05%)
O: 46,43% (G:12,40% B:0,51%)

Front 38

Back 38

1 R 24/23 13/8 eq:-0,174
2 R 13/8 6/5 eq:-0,196 (-0,022)
3 R 24/18 eq:-0,200 (-0,025)

Front 39

Back 39

1 R 24/20 6/1* eq:-0,168
2 R 24/20 13/8 eq:-0,224 (-0,056)

Front 40

Back 40

1 R 24/14 eq:-0,172
2 R 24/18 13/9 eq:-0,173 (-0,001)
3 R 8/2 6/2 eq:-0,243 (-0,071)

Front 41

Back 41

1 R 13/10 13/9 eq:-0,200
2 R 24/21 13/9 eq:-0,202 (-0,002)
3 R 24/21 24/20 eq:-0,216 (-0,016)
4 R 24/20 13/10 eq:-0,217 (-0,016)

Front 42

Back 42

1 R 13/7* eq:-0,074
2 R 8/4 6/4 eq:-0,093 (-0,019)

Front 43

Back 43

1 8/2 6/2 eq:-0,109

2 24/14 eq:-0,171 (-0,062)

Front 44

Back 44

1 R 13/7* eq:-0,092

2 R 8/4 6/4 eq:-0,135 (-0,043)

Front 45

Back 45

1 R 24/15 eq:-0,272
2 R 24/21 13/7 eq:-0,281 (-0,009)
3 R 24/21 24/18 eq:-0,289 (-0,017)
4 R 24/18 13/10 eq:-0,301 (-0,029)

Front 46

Back 46

1 R 8/2 6/2 eq:-0,298
2 R 24/14 eq:-0,305 (-0,007)
3 R 24/18 13/9 eq:-0,322 (-0,024)

Front 47

Back 47

1 R 13/8 6/5 eq:-0,204
2 R 24/23 13/8 eq:-0,235 (-0,031)
3 R 24/18 eq:-0,242 (-0,037)

Front 48

Back 48

1 R 13/8 13/11* eq:+0,084

2 R 13/11* 6/1* eq:+0,007 (-0,077)

Front 49

Back 49

1 R 24/21 24/20 eq:-0,226

2 R 24/21 13/9 eq:-0,229

3 R 24/20 13/10 eq:-0,252

4 R 13/10 13/9 eq:-0,272 (-0,046)

Front 50

Back 50

1 R 24/20 13/10 eq:-0,173

2 R 24/21 13/9 eq:-0,186 (-0,013)

3 R 13/10 13/9 eq:-0,203 (-0,030)

4 R 24/21 24/20 eq:-0,206 (-0,033)

Front 51

Back 51

1 R 24/21 eq:-0,165

2 R 13/11 6/5 eq:-0,174 (-0,009)

3 R 13/10 eq:-0,186 (-0,021)

4 R 24/23 13/11 eq:-0,187 (-0,022)

- 21U plays well when opponent has split the back checkers and there are only two attackers within range of the twenty-one point. It makes a good attempt at an advanced anchor and avoids multiple indirect shots in the outfield.

- The value of developing the midpoint by leaving a blot in the outfield is related, in part, to how often it is hit.