Replies to 24/22, 13/8

Best Nearly Best Pretty Good Not So Good Here are White's best replies after Red opens 24/22, 13/8. The EQUITY column shows the estimated cubeless equity of each potential play. The best play is displayed with a white background and the other plays are displayed with progressively darker backgrounds to give a rough idea of the amount of equity lost. Plays that give up more than 0.05 in cubeless equity are not listed at all. The VOTES column indicates the recommendations of some selected experts:       R = Bill Robertie, in Inside Backgammon, Volume 8 (1998).       B = Bart Brooks, in Backgammon's Best Openings and Replies (2004). The check marks denote the best play for each of the following situations: Cubeless (CL): Cubeless money play. Double Match Point (DMP): In a match which has come down to one final game. Gammon-Go (GG): When aggressively going for a gammon win. Gammon-Save (GS): When aggressively avoiding a gammon loss.

	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/22, 6/5(2)   + .535, .139, .005   − .465, .120, .004 +.088   RB   24/23, 6/5(3)   + .525, .144, .005   − .475, .127, .005 +.066   (.022) (.020) (.010) (.033)   24/23(2), 6/5(2)   + .521, .142, .005   − .479, .123, .005 +.062   (.026) (.026) (.019) (.031)   8/5, 6/5   + .518, .147, .005   − .482, .131, .006 +.052   (.036) (.033) (.016) (.054)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/23, 13/11   + .464, .120, .004   − .536, .152, .007 −.105   RB   24/21   + .458, .110, .004   − .542, .146, .005 −.122   (.016) (.014) (.033) (.002)   13/10   + .455, .120, .004   − .545, .156, .008 −.130   (.025) (.019) (.018) (.029)   6/3*   + .458, .119, .004   − .542, .160, .009 −.131   (.025) (.014) (.015) (.031)   24/23, 24/22   + .454, .108, .004   − .546, .152, .005 −.137   (.032) (.021) (.043) (.022)   13/11, 6/5   + .458, .119, .004   − .542, .176, .012 −.150   (.045) (.013) (.016) (.062)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   13/11(2), 6/4(2)   + .552, .154, .006   − .448, .119, .005 +.140   RB (.015)   24/22(2), 6/4(2)   + .538, .138, .005   − .462, .097, .003 +.117   (.023) (.029) (.062)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   8/5, 6/5   + .518, .147, .005   − .482, .131, .006 +.052   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/21, 13/11   + .472, .123, .005   − .528, .153, .007 −.089   (.012)   13/11, 6/3*   + .470, .130, .005   − .530, .163, .010 −.098   B (.009) (.003) (.023)   6/3*/1*   + .465, .128, .004   − .535, .155, .007 −.100   R (.011) (.013) (.015) (.015)   24/22, 6/3*   + .464, .119, .004   − .536, .152, .007 −.108   (.019) (.015) (.035) (.012)   13/11, 13/10   + .459, .129, .005   − .541, .159, .010 −.116   (.027) (.025) (.023) (.036)   13/8   + .460, .116, .004   − .540, .152, .007 −.119   (.030) (.024) (.049) (.021)   24/22, 24/21   + .460, .109, .004   − .540, .151, .005 −.124   (.035) (.024) (.064) (.019)   24/22, 13/10   + .454, .117, .004   − .546, .153, .007 −.131   (.042) (.036) (.059) (.035)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   8/5(2), 6/3*(2)   + .604, .232, .009   − .396, .102, .005 +.342   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   13/8   + .460, .116, .004   − .540, .152, .007 −.119   B (.013)   24/23, 24/20   + .459, .105, .004   − .541, .145, .005 −.123   R (.003) (.001) (.022)   8/3*   + .447, .121, .004   − .553, .169, .010 −.160   (.040) (.026) (.016) (.072)   24/23, 13/9   + .444, .115, .004   − .556, .163, .007 −.164   (.044) (.032) (.033) (.067)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   8/4, 6/4   + .501, .142, .005   − .499, .134, .006 +.009   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/20, 6/3*   + .470, .117, .004   − .530, .145, .007 −.090   B (.002) (.039)   13/9, 6/3*   + .471, .136, .005   − .529, .163, .011 −.090   (.000) (.034)   24/21, 24/20   + .465, .106, .004   − .535, .142, .005 −.106   R (.016) (.011) (.071) (.004)   24/20, 13/10   + .458, .114, .004   − .542, .149, .007 −.121   (.031) (.025) (.069) (.032)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/20(2), 13/9(2)   + .588, .130, .004   − .412, .065, .002 +.244   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/23, 13/8   + .466, .120, .004   − .534, .148, .005 −.098   RB   24/18   + .464, .104, .004   − .536, .156, .005 −.126   (.028) (.004) (.037) (.020)   24/23, 8/3*   + .450, .120, .004   − .550, .163, .008 −.146   (.048) (.030) (.031) (.060)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   13/11, 13/8   + .468, .129, .005   − .532, .152, .007 −.091   (.002) (.013)   24/22, 13/8   + .469, .118, .004   − .531, .146, .005 −.091   RB (.000) (.019)   8/3*/1*   + .454, .127, .004   − .546, .159, .008 −.127   (.036) (.028) (.030) (.053)   13/11, 8/3*   + .455, .129, .005   − .545, .169, .011 −.135   (.044) (.026) (.023) (.071)   24/22, 8/3*   + .452, .121, .004   − .548, .158, .008 −.136   (.045) (.032) (.046) (.055)   24/22, 6/1*   + .452, .115, .004   − .548, .153, .007 −.138   (.047) (.034) (.058) (.048)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   8/3*, 6/3   + .526, .168, .007   − .474, .130, .006 +.092   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/20, 13/8   + .476, .115, .004   − .524, .142, .005 −.076   RB (.015)   24/15   + .471, .102, .004   − .529, .147, .005 −.105   (.030) (.010) (.053) (.021)   24/20, 6/1*   + .462, .114, .003   − .538, .143, .006 −.108   (.032) (.028) (.045) (.031)   24/20, 8/3*   + .460, .117, .004   − .540, .146, .007 −.112   (.036) (.031) (.042) (.040)   13/9, 8/3*   + .462, .137, .005   − .538, .167, .011 −.113   (.037) (.028) (.079)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   8/3*(2), 6/1*(2)   + .598, .290, .007   − .402, .104, .004 +.385   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   13/7, 8/7   + .498, .130, .005   − .502, .136, .005 −.011   RB
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/18, 13/11   + .473, .110, .004   − .527, .155, .006 −.102   RB (.003) (.010)   24/16   + .474, .102, .004   − .526, .152, .005 −.102   (.000) (.012)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/15   + .471, .102, .004   − .529, .147, .005 −.105   RB (.020)   24/18, 13/10   + .464, .108, .004   − .536, .155, .006 −.122   (.017) (.014) (.023) (.029)   13/7, 6/3*   + .459, .124, .004   − .541, .165, .011 −.129   (.024) (.024) (.059)   24/21, 24/18   + .456, .102, .004   − .544, .164, .006 −.151   (.046) (.029) (.049) (.063)   24/21, 13/7   + .444, .118, .004   − .556, .157, .008 −.154   (.049) (.054) (.041) (.073)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   13/3*   + .467, .132, .005   − .533, .153, .008 −.089   B (.006) (.019)   24/14   + .470, .107, .004   − .530, .146, .005 −.100   R (.011) (.044)   8/2, 6/2   + .462, .133, .004   − .538, .154, .007 −.101   (.012) (.017) (.011) (.033)   24/18, 13/9   + .456, .110, .004   − .544, .155, .007 −.136   (.047) (.028) (.067) (.046)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/13   + .494, .096, .003   − .506, .130, .004 −.046   RB (.003)   24/18, 13/8   + .481, .110, .004   − .519, .146, .005 −.074   (.028) (.026) (.059)
	PLAY W      G     BG     EQUITY VOTES CL DMP GG GS   24/18(2), 13/7(2)   + .617, .128, .004   − .383, .070, .002 +.294   RB
Summary Rolls in order from luckiest to unluckiest, and calculation of average equity. (+.392) 8/3*(2), 6/1*(2) +.385 × 1  =   +.385 (+.349) 8/5(2), 6/3*(2) +.342 × 1  =   +.342 (+.301) 24/18(2), 13/7(2) +.294 × 1  =   +.294 (+.251) 24/20(2), 13/9(2) +.244 × 1  =   +.244 (+.146) 13/11(2), 6/4(2) +.140 × 1  =   +.140 (+.099) 8/3*, 6/3 +.092 × 2  =   +.185 (+.095) 24/22, 6/5(2) +.088 × 1  =   +.088 (+.058) 8/5, 6/5 +.052 × 2  =   +.103 (+.015) 8/4, 6/4 +.009 × 2  =   +.017 (−.004) 13/7, 8/7 −.011 × 2  =   −.021 (−.039) 24/13 −.046 × 2  =   −.092 (−.069) 24/20, 13/8 −.076 × 2  =   −.152 (−.082) 13/3* −.089 × 2  =   −.178 (−.082) 24/21, 13/11 −.089 × 2  =   −.178 (−.083) 24/20, 6/3* −.090 × 2  =   −.180 (−.084) 13/11, 13/8 −.091 × 2  =   −.182 (−.091) 24/23, 13/8 −.098 × 2  =   −.196 (−.095) 24/18, 13/11 −.102 × 2  =   −.204 (−.099) 24/23, 13/11 −.105 × 2  =   −.211 (−.099) 24/15 −.105 × 2  =   −.211 (−.112) 13/8 −.119 × 2  =   −.239   ———   White's Average Equity −.246  ÷  36  =  −.007

 

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