Doubling and Double Approaching Strategies

Double Approaching Strategy

Double approaching strategy is based on the concept of avoiding a bogie leave such as 159,162,163,165,166,168 or 169. The point being that it is better to score 1 or 2 points less to leave a finish. For example, a 136 score with 306 left will leave you on 170 which is better than scoring 140 to leave 166!

Left Shoot Miss 2nd Dart Miss 1st Dart Miss 1st & 2nd Darts Explanation
315 T20-T20-SB(DB)       145 leaves 170
312 T20-T20-SB(DB) *       145 leaves 167
310 T20-T20-20(T20) T20-20-T20 20-T20-T20   140 leaves 170
309 T20-T19-SB(DB) * T20-19-T20     Avoid 140 - Need 139 or 142
308 T20-T20-18(T18)       Avoid 140 - 138 leaves 170
307 T20-T20-20(T20) T20-20-T20 20-T20-T20   140 leaves 167
306 T19-T19-SB(DB) * T19-19-T20 19-T20-T20   Avoid 140 - Need 136, 139 or 142
305 T20-T20-18(T18)       Avoid 140 - 138 leaves 167
304 T20-T20-20(T20) T20-20-T20 20-T20-T20   140 leaves 164
303 T19-T19-19(T19) T19-19-T20 19-T20-T20   Avoid 140 - Need 133, 136, 139
302 T18-T18-T20 T18-18-T20 18-T20-T20   Avoid 140 - Need 132, 135, 138
301 T20-T20-20(T20) T20-20-T20 20-T20-T20   140 leaves 161
300 T20-T20-20(T20) T20-20-T20 20-T20-T20   140 leaves 160
299 T19-T18-18(T18) T19-18-T20 19-T20-T20   Avoid 140 - Need 129, 135, 139
275 T20-20(T20)-SB(DB) *   20-T20-SB(DB)   105 leaves 170
274 T20-19(T19)-SB(DB) *   20-T20-T20   104 leaves 170
273 T20-18(T18)-SB(DB) *   20-T20-T20   103 leaves 170
272 T20-20(T20)-SB(DB) *   20-T20-SB(DB)   105 leaves 167
271 T19-19(T19)-SB(DB) *   19-T20-SB(DB)   101 or 104 leaves a finish
270 T20-20(T20)-20(T20)   20-T20-20(T20) 20-20-T20 100 leaves 170
269 T19-20(T20)-SB(DB) *   19-T20-20(T20) 19-20-T20 Avoid 100 - 99 or 102 leaves a finish
268 T18-19(T19)-SB(DB) *   18-T20-20(T20) 18-20-T20 Avoid 100 - 98 or 101 leaves a finish
267 T20-20(T20)-20(T20)   20-T20-20(T20) 20-20-T20 100 leaves 167
266 T20-20(T20)-19(T19)   20-T19-19(T19) 20-19-T20 Avoid 100 - 96 or 99 leaves a finish
265 T19-19(T19)-19(T19)   19-T19-19(T19) 19-19-T20 Avoid 100 - 95 or 98 leaves a finish
264 T20-20(T20)-20(T20)   20-T20-20(T20) 20-20-T20 100 leaves 164
263 T20-20(T20)-19(T19)   20-T19-19(T19) 20-19-T20 Avoid 100 - 96 or 99 leaves a finish
262 T19-19(T19)-19(T19)   19-T19-19(T19) 19-19-T20 Avoid 100 - 95 or 98 leaves a finish
261 T20-20(T20)-20(T20)   20-T20-20(T20) 20-20-T20 100 leaves 161
260 T20-20(T20)-20(T20)   20-T20-20(T20) 20-20-T20 100 leaves 160
259 T19-19(T19)-19(T19)   19-T20-20(T20) 19-20-T20 95 or 99 leaves a finish
255 T19-19(T19)-19(T19)   19-T19-19(T19) 19-19-T19 Better to leave 160 than 155
235 20(T20)-20(T20)-SB(DB) *       65 leaves 170
234 20(T20)-19(T19)-SB(DB) *       64 leaves 170
233 19(T19)-19(T19)-SB(DB) *       63 leaves 170
232 20(T20)-20(T20)-SB(DB) *       62 leaves 170
231 20(T20)-19(T19)-SB(DB) *       61 leaves 170
230 20(T20-20(T20)-20(T20)       60 leaves 170
229 20(T20)-20(T20)-19(T19)       Avoid 60 - 59 leaves 170
228 20(T20)-19(T19)-19(T19)       Avoid 60 - 58 leaves 170
227 20(T20-20(T20)-20(T20)       60 leaves 167
226 20(T20)-20(T20)-19(T19)       Avoid 60 - 59 leaves 167
225 20(T20)-19(T19)-19(T19)       Avoid 60 - 58 leaves 167
224 20(T20-20(T20)-20(T20)       60 leaves 164
223 20(T20)-20(T20)-19(T19)       Avoid 60 - 59 leaves 164
222 20(T20)-19(T19)-19(T19)       Avoid 60 - 58 leaves 164
221 20(T20-20(T20)-20(T20)       60 leaves 161
220 20(T20-20(T20)-20(T20)       60 leaves 160
219 20(T20)-20(T20)-19(T19)       Avoid 60 - 59 leaves 160
218 20(T20)-19(T19)-19(T19)       Avoid 60 - 58 leaves 160
217 20(T20-20(T20)-20(T20)       60 leaves 157
216 20(T20-20(T20)-20(T20)       60 leaves 156
215 20(T20)-19(T19)-19(T19)       Better to leave 157 than 155

* only use bull strategy when opponent is ahead or tied
** only use double approaching strategies when opponent is at 315 or less
20(T20) means that a single 20 was hit while aiming for triple 20
likewise SB(DB) means that single bull was hit while aiming for a double bull

Doubling Strategies

Doubling strategies are based on the qualities of the doubles. There are three points of interest when considering double breakdown strategy.

Double Categories

Group A
Double Break Downs Size Value Relative Strength
D16 4 >31 8
D10 1 >15 5.5
D4 2 >7 5.5
D19 0 >31 4
D13 0 >21 3.75
D7 0 >7 2.5
D1 0 <4 0
Group B
Double Break Downs Size Value Relative Strength
D8 3 >15 7
D20 2 >31 7
D14 1 >21 5.75
D17 0 >31 4
D11 0 >21 3.75
D2 1 >3 3.5
D5 0 >7 2.5
Group C
Double Break Downs Size Value Relative Strength
D12 2 >21 6.75
D18 1 >31 6
D6 1 >7 4.5
D15 0 >21 3.75
D9 0 >15 3.5
D3 0 >3 1.5

 

These groups and relative strategies will be essential in selecting the best breakdowns. There are however, other important criteria when considering breakdowns such as darts available and opponent's score. As a result, the breakdown charts will have several columns for missed shots and other considerations. I will also break the charts down into categories. In parenthesis in the headers are calculated percentages for these strategies based on calculations for approximately a 100 shot average skill level.

Triple-Triple-Double Bull

T-T-DB Breakdowns (2.9%)
Left Method
170 T20-T20-DB
167 T20-T19-DB
164 T19-T19-DB
161 T20-T17-DB

These can only be done by using double bull. So there is very little choice here except that one could play T20-T18-DB on 164. It should be noted that one does not need to play the finish if the opponent is not on a 3 dart breakdown. Statistically it is better in this situation to setup a good double for the next shot such as double 16.

Triple-Triple-Double

T-T-D Breakdowns (5.8%)
Left Method Comment
160 T20-T20-D20 Group B - D20 is preferred
158 T20-T20-D19 Group A - Cannot reach D16
157 T20-T19-D20 Group B
156 T20-T20-D18 Group C - Cannot reach D12
155 T20-T19-D19 Group A - Cannot reach D16
154 T19-T19-D20 Group B
153 T20-T19-D18 Group C - Cannot reach D12
152 T20-T20-D16 Group A - D16 is preferred
151 T20-T17-D20 Group B
150 T19-T19-D18 Group C - Cannot reach D12
149 T20-T19-D16 Group A
148 T20-T20-D14 or T20-T16-D20 or T18-T18-D20 Group B - Using T20-D14 instead of small T-D20
147 T20-T17-D18 Group C - Cannot reach D12
146 T19-T19-D16 Group A
145 T20-T15-D20 or T20-T19-D14 Group B - Using T19-D14 instead of small T-D20
144 T20-T20-D12 Group C - D12 is preferred
143 T20-T17-D16 Group A
142 T17-T17-D20 Group B
141 T20-T19-D12 Group C
140 T20-D20-D20 or T20-T16-D16 Group A
139 T19-T14-D20 Group B - avoid landing on 119
138 T20-D19-D20 or T20-T18-D12 Group C
137 T20-T15-D16 Group A
136 T20-D18-D20 or T20-T16-D14 or T18-T18-D14 Group B - must avoid D8 because of busting
134 T20-D17-D20 or T17-T17-D16 Group A
133 T19-D18-D20 or T20-T15-D14 or T20-T11-D20 Group B - must avoid D8 because of busting
131 T19-D17-D20 or T20-T13-D16 Group A

 

Bull-Triple-Double Bull

SB-T-DB (8.4%)
Left Method Method with SB
135 DB-T15-D20 SB-T20-DB
132 DB-T14-D20 SB-T19-DB

This strategy is statistically better for 3 dart outs than the T-T-D strategy. However, if the opponent is above 120 then it is likely better to play the T-T-D strategy and play for a 6 dart win. In this case T20-T17-D12 and T20-T16-D12 is suggested.

Triple-Single-Double Bull / Single-Triple-Double Bull

T-S-DB (13.7%, 9.7% for 128 and 129, 17.6% for 119)
Left Method T-T-D Miss 1st dart - S-T-DB Miss 2nd dart - T-S-DB
130 T20-T20-D5 S20-T20-DB T20-S20-DB
129 T19-D20-D16 or T19-T16-D12 S19-T20-DB
128 T20-D18-D16 or T18-T14-D16 S18-T20-DB
127 T20-T17-D8 S20-T19-DB T20-S17-DB
126 T19-T19-D6 S19-T19-DB T19-S19-DB
124 T20-T14-D11 S20-T18-DB T20-S14-DB
123 T19-T16-D9 S19-T18-DB T19-S16-DB
121 T20-T11-D14 S20-T17-DB T20-S11-DB
119 T19-T12-D13 S19-T20-D20 T19-S12-DB

Notice 122 and 125 are left out as they have another strategy using bull which gives a slight percentage advantage over the T-S-DB/S-T-DB strategy.

Bull-Triple-Double

SB-T-D (13.8%)
Left Method with DB Method with SB Method if 15 or 18
125 DB-T17-D12 SB-T20-D20 S15-T20-DB or S18-T19-DB
122 DB-T20-D6 SB-T19-D20 S18-T18-DB or S15-T19-DB or S12-T20-DB

Triple-Single-Double/Single-Triple-Double

T-S-D (22.3% to 23.1%)
Left Method Miss 1st Dart Comment
120 T20-S20-D20 S20-T20-D20 Shang Hi!
118 T20-S18-D20 S20-T20-D19 T18 on 1st dart does not leave a S-D possibility
117 T20-S17-D20 S20-T19-D20
116 T19-S19-D20 S19-T19-D20 116-76=40
115 T19-S18-D20 S19-T20-D18 better than S20-T19-D19
114 T20-S14-D20 S20-T18-D20
113 T19-S16-D20 S19-T18-D20 S19 leaves is better than S20!
112 T20-S12-D20 S20-T20-D16 Busting is too dangerous on T20-S20-D16
111 T19-S14-D20 S19-T20-D16 92 leave is better than 91
110 T19-S13-D20 S19-T17-D20 T20-DB only with 2 darts
109 T20-S17-D16 S20-T19-D16
108 T19-S19-D16 S19-T19-D16 108-76=32
107 T19-S10-D20 S19-T20-D14 T19-DB only with 2 darts 3 or 7 leaves a 2 darter
106 T20-S6-D20 or T20-S10-D18 S20-T18-D16 Leaving 46 allows 6 or 10
105 T20-S13-D16 S20-T15-D20 5 or 1 still leaves 2 darter
104 T19-S7-D20 or T19-S19-D14 S19-T15-D20 T18-DB only with 2 darts 3 or 7 leaves a 2 darter
103 T19-S10-D18 or T19-S6-D20 S19-T20-D12 Leaving 46 allows 6 or 10 also 3 or 7 leaves 2 darter
102 T16-S14-D20 S16-T18-D16 Avoid 3 or T1 because 99 is only number <102 that cannot be closed with 2 darts
101 T18-S7-D20 or T18-S19-D14 S18-T17-D16 T17-DB only with 2 darts
99 T19-S10-D16 or T19-S6-D18 S19-T20-D10 or S19-T16-D16 Leaving 42 allows 6 or 10

Triple-Double

T-D (33.7%, 34.1% with S-D-D, 29.2% for 95 and 98, 39.2% for 81, and 83 to 89, 34.6% for 90)
Left Method 3 Darts Miss 1st Dart Miss 2nd Dart Method 6 Darts
100 T20-D20 S20-D20-D20 or S20-T20-D10 S20-T20-D10
98 T20-D19 S20-D19-D20 or S20-T18-D12 T20-S6-D16 or T20-S10-D14
97 T19-D20 S19-D19-D20 or S19-T18-D12 S19-T18-D12
96 T20-D18 S20-D19-D19 or S20-T20-D8 S20-T16-D14
95 T19-D19 S19-D19-D19 or S19-T20-D8 DB-S13-D16 or SB-T10-D20
94 T18-D20 S18-D19-D19 or S18-T20-D8 S18-T16-D14
93 T19-D18 S19-D17-D20 or S19-T14-D16 S19-T14-D16
92 T20-D16 S20-D20-D16 or S20-T20-D6 S20-T16-D12
91 T17-D20 S17-D17-D20 or S17-T14-D16 S17-T14-D16
90 T20-D15 S20-D20-D15 or S20-T20-D5 S20-S20-DB DB-D20 or SB-T11-D16
89 T19-D16 S19-D20-D15 or S19-T20-D5 S19-S20-DB S19-T18-D8
88 T20-D14 S20-D18-D16 or S20-T18-D7 S20-S18-DB S20-T12-D16
87 T17-D18 S17-D20-D15 or S17-T20-D5 S17-S20-DB S17-T18-D8
86 T18-D16 S18-D18-D16 or S18-T18-D7 S18-S18-DB S18-T12-D16
85 T15-D20 S15-D20-D15 or S15-T20-D5 S15-S20-DB DB-S3-D16 or SB-S20-D20
83 T17-D16 S17-D16-D17 or S17-T16-D9 S17-S16-DB S17-T14-D12
81 T19-D12 S19-D12-D19 or S19-T12-D13 S19-S12-DB S19-T10-D16

6 Dart strategies should be used when the opponent's score is above 120. Using S-D-D strategies are risky and should only be used when the opponent is almost sure to finish next shot.

Many players believe that B-S-DB is a better strategy for 91-95 scores, but this is false. Percentages for that strategy is only 27.0% - falling shy of the 33.7% T-D percentage and 34.1% S-D-D option. Even the lower 29.2% T-D for 95 is better than the 27.0% bull strategy. It should be noted that the higher percentage with the S-D-D option comes with the risk of a lower 6 dart percentage if you miss, since there is the possibility of missing outside on the first double!

It is also possible to play the SB-S-D strategies for 81, 83 and 85 as the percentages are very close. However, 83 is suggested to stay with T17-D16 simply because there is no way of using the bottom of the board after DB to leave a good double. For example, on with 81, DB-3-D14 and a miss on either side of the 3 still leaves a shot at a double.

Single Bull-Single-Double/Double Bull-Double

SB-S-D (40.9% for 82, 38.5% for 84, 36.1% for 81 and 85)
Left Method Miss 1st Dart 2 Darts
85 DB-3 or 19-D16 or D8 SB-S20-D20 T15-D20
84 DB-D17 SB-S19-D20 T20-D12
82 DB-D16 SB-S17-D20 T14-D20
81 DB-3-D14 SB-S16-D20 T19-D12

84 is a toss up. T20-D12 is slightly better if you're willing to go 20-D16-D16 on the miss. The percentages vary with skill, such that 81 and 85 is probably better on T-D strategy for most players. However, 82 is likely better SB-17-D20 for all skill levels. 83 is suggested T-D because the edge for SB-18-D20 is only slight for top players and there is no bottom of the board leave after DB to leave a good double.

Single-Single-Double

S-S-D (45.6%)
Left Method Miss 1st Dart 6 Darts
80 T20-D10 S20-S20-D20
79 T19-D11 S19-S20-D20
78 T18-D12 S18-S20-D20
77 T19-D10 S19-S18-D20
76 T16-D14 S16-S20-D20 T20-D8
75 T17-D12 S17-S18-D20
74 T14-D16 S14-S20-D20
73 T19-D8 S19-S14-D20 T15-D14
72 T16-D12 S16-S16-D20 T20-D6
71 T13-D16 S13-S18-D20
70 T10-D20 S10-S20-D2 T18-D8
69 T15-D12 S15-S14-D20 T19-D6
68 T12-D16 S12-S16-D20 T20-D8
67 T9-D20 S9-S18-D20 T17-D8
66 T14-D12 S14-S20-D16 T18-D6
64 T16-D8 S16-S16-D16 or S16-S8-D16
63 T17-D6 S17-S6-D20 or S17-S10-D18 T13-D12
62 T10-D16 S10-S20-D16

Single Bull-Double

SB-D (56.2%)
Left Method Miss 1st Dart 6 Darts
65 DB-S7-D4 SB-D20 T11-D16
61 DB-S3-D4 SB-D18 T15-D8

63 is slightly better with S-S-D but it could also be played using SB-D19.

Single-Double

S-D (62.7%)
Left Method 3 Darts Method 6 Darts Comments
60 S20-D20
59 S19-D20
58 S18-D20
57 S17-D20
56 S16-D20
55 S15-D20
54 S14-D20
53 S13-D20
52 S12-D20 S20-D16
51 S11-D20 S19-D16
50 S10-D20 S18-D16
49 S9-D20 S17-D16
48 S8-D20 S16-D16 can play 8 or 16
47 S7-D20 or S19-D14 S15-D16 can play 7 or 19
46 S6-D20 or S10-D18 S14-D16 can play 6 or 10
45 S13-D16
44 S8-D16 or S16-D14 S12-D16
43 S3-D20 or S19-D12 or S17-D13 S11-D16 can play 3 or 19
42 S6-D18 or S10-D16 can play 6 or 10
41 S17-D12 or S3-D19 S9-D16 can play 3 or 17
39 S7-D16 or S19-D10 can play 7 or 19
37 S19-D14 or S7-D15 or S3-D17 S5-D16 can play 19,7,3 area
35 S3-D16 or S19-D8 can play 3 or 19
33 S17-D8 or S3-D15 S1-D16 can play 3 or 17
31 S3-D14 or S19-D11 or S17-D7 S15-D8 can play 19,7,3 area
29 S13-D8 can play 19,7,3 area
27 S3-D12 or S19-D4 or S7-D10 S11-D8
25 S17-D4 or S3-D11 S9-D8 can play 3 or 17
23 S7-D8 or S19-D4 or S3-D10 can play 19,7,3 area
21 S17-D2 or S3-D9 S5-D8 can play 3 or 17
19 S3-D8
17 S1-D8
15 S7-D4
13 S5-D4
11 S3-D4
9 S1-D4
7 S3-D2
5 S1-D2
3 S1-D1

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