I don't know what you consider significant or insignificant but I believe that a 5% of increase in SCORE is not insignificant. Below is part of the analysis I did a long time ago:
The game is 2D,S17,DOA,DAS,SPA1,SPL3,NS,Catch-22,5 billion rounds.
We'll see how much worth is the use of an ace side count for two different penetrations (50% and 75%).
A) Penetration 50%
1) Hi-Lo
play-all | rounds played = 100.00%
spread ev/h sd/h ror% n0 di score ekb avb unit kelly
------------------------------------------------------------------------------
1 - 1 -0.138 11.609 100.00 0 0.00 0.00 10000.00 1.000 1.000 0.000
1 - 2 0.283 15.750 13.53 308783 1.80 3.24 875.19 1.281 11.426 1.000
1 - 3 0.705 20.901 13.53 87973 3.37 11.37 619.94 1.561 16.131 1.000
1 - 4 1.034 23.986 13.53 53761 4.31 18.60 556.15 1.702 17.981 1.000
1 - 5 1.389 28.083 13.53 40892 4.95 24.46 567.89 1.880 17.609 1.000
1 - 6 1.671 30.974 13.53 34351 5.40 29.11 574.06 1.997 17.420 1.000
1 - 7 1.963 34.192 13.53 30354 5.74 32.95 595.70 2.126 16.787 1.000
1 - 8 2.265 37.708 13.53 27712 6.01 36.09 627.72 2.266 15.931 1.000
1 - 9 2.517 40.468 13.53 25841 6.22 38.70 650.51 2.373 15.373 1.000
1 - 10 2.760 43.136 13.53 24422 6.40 40.95 674.10 2.475 14.835 1.000
2) Hi-Lo/A
play-all | rounds played = 100.00%
spread ev/h sd/h ror% n0 di score ekb avb unit kelly
------------------------------------------------------------------------------
1 - 1 -0.118 11.605 100.00 0 0.00 0.00 10000.00 1.000 1.000 0.000
1 - 2 0.311 15.740 13.53 256353 1.98 3.90 796.92 1.281 12.548 1.000
1 - 3 0.740 20.885 13.53 79696 3.54 12.55 589.58 1.561 16.961 1.000
1 - 4 1.075 24.002 13.53 49866 4.48 20.05 535.98 1.704 18.657 1.000
1 - 5 1.435 28.115 13.53 38379 5.10 26.06 550.79 1.884 18.156 1.000
1 - 6 1.727 31.130 13.53 32484 5.55 30.78 561.06 2.008 17.823 1.000
1 - 7 2.024 34.383 13.53 28857 5.89 34.65 584.07 2.139 17.121 1.000
1 - 8 2.332 37.927 13.53 26447 6.15 37.81 616.78 2.282 16.213 1.000
1 - 9 2.619 41.191 13.53 24744 6.36 40.41 647.94 2.411 15.434 1.000
1 - 10 2.868 43.918 13.53 23457 6.53 42.63 672.63 2.517 14.867 1.000
Gain of Hi-Lo/A over Hi-Lo
+--------+---------+
| 1 - 2 | 20.37% |
+--------+---------+
| 1 - 3 | 10.38% |
+--------+---------+
| 1 - 4 | 7.80% |
+--------+---------+
| 1 - 5 | 6.54% |
+--------+---------+
| 1 - 6 | 5.74% |
+--------+---------+
| 1 - 7 | 5.16% |
+--------+---------+
| 1 - 8 | 4.77% |
+--------+---------+
| 1 - 9 | 4.42% |
+--------+---------+
| 1 - 10 | 4.10% |
+--------+---------+
B) Penetration 75%
1) Hi-Lo
play-all | rounds played = 100.00%
spread ev/h sd/h ror% n0 di score ekb avb unit kelly
------------------------------------------------------------------------------
1 - 1 -0.018 11.633 100.00 0 0.00 0.00 10000.00 1.000 1.000 0.000
1 - 2 0.713 16.438 13.53 53219 4.33 18.79 379.20 1.334 26.371 1.000
1 - 3 1.339 20.239 13.53 22864 6.61 43.74 306.03 1.536 32.677 1.000
1 - 4 1.895 23.655 13.53 15591 8.01 64.14 295.36 1.691 33.857 1.000
1 - 5 2.403 26.885 13.53 12514 8.94 79.91 300.75 1.830 33.251 1.000
1 - 6 2.891 30.090 13.53 10834 9.61 92.30 313.19 1.964 31.929 1.000
1 - 7 3.339 33.019 13.53 9778 10.11 102.28 326.50 2.084 30.628 1.000
1 - 8 3.809 36.254 13.53 9059 10.51 110.40 345.05 2.216 28.981 1.000
1 - 9 4.227 39.066 13.53 8540 10.82 117.10 361.01 2.329 27.700 1.000
1 - 10 4.646 41.926 13.53 8146 11.08 122.77 378.39 2.443 26.428 1.000
2) Hi-Lo/A
play-all | rounds played = 100.00%
spread ev/h sd/h ror% n0 di score ekb avb unit kelly
-----------------------------------------------------------------------------
1 - 1 0.015 11.635 13.5364132650 0.12 0.02 9317.24 1.000 1.073 1.000
1 - 2 0.759 16.439 13.53 46871 4.62 21.34 355.90 1.334 28.097 1.000
1 - 3 1.396 20.266 13.53 21089 6.89 47.42 294.30 1.538 33.979 1.000
1 - 4 1.963 23.742 13.53 14634 8.27 68.34 287.20 1.696 34.819 1.000
1 - 5 2.486 27.081 13.53 11862 9.18 84.31 294.94 1.841 33.905 1.000
1 - 6 2.983 30.329 13.53 10336 9.84 96.75 308.34 1.978 32.432 1.000
1 - 7 3.442 33.320 13.53 9371 10.33 106.72 322.54 2.101 31.004 1.000
1 - 8 3.908 36.478 13.53 8711 10.71 114.80 340.45 2.230 29.373 1.000
1 - 9 4.318 39.167 13.53 8230 11.02 121.52 355.30 2.338 28.145 1.000
1 - 10 4.744 42.068 13.53 7863 11.28 127.19 373.01 2.455 26.809 1.000
Gain of Hi-Lo/A over Hi-Lo
+--------+---------+
| 1 - 2 | 13.57% |
+--------+---------+
| 1 - 3 | 8.41% |
+--------+---------+
| 1 - 4 | 6.55% |
+--------+---------+
| 1 - 5 | 5.50% |
+--------+---------+
| 1 - 6 | 4.82% |
+--------+---------+
| 1 - 7 | 4.34% |
+--------+---------+
| 1 - 8 | 3.99% |
+--------+---------+
| 1 - 9 | 3.75% |
+--------+---------+
| 1 - 10 | 3.60% |
+--------+---------+
One thing I find very important is that with poor penetration the gain is even bigger. A similar analysis applies to the 6D game.
Sincerely,
Cacarulo
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