The position below kicks off a series of "4pt vs 7pt" problems.
These are positions that I had trouble with at one point in time,
so they are not necessarily the most useful positions for other
people to study, but it's what I've got.

XGID=-a---BEAAa--cD---cbe----B-:0:0:1:11:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O | | O X |
| X O O | | O X |
| X O | | O |
| X | | O |
| | | O |
| |BAR| |
| | | X |
| | | X |
| O | | X |
| O | | X X |
| O O X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 155 O: 147 X-O: 0-0
Cube: 1
X to play 11

---
Tim Chow

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 6/12/2023 8:49 AM, Timothy Chow wrote:

The position below kicks off a series of "4pt vs 7pt" problems.
These are positions that I had trouble with at one point in time,
so they are not necessarily the most useful positions for other
people to study, but it's what I've got.

XGID=-a---BEAAa--cD---cbe----B-:0:0:1:11:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
 +13-14-15-16-17-18------19-20-21-22-23-24-+
 | X           O  O |   | O              X |
 | X           O  O |   | O              X |
 | X           O    |   | O                |
 | X                |   | O                |
 |                  |   | O                |
 |                  |BAR|                  |
 |                  |   | X                |
 |                  |   | X                |
 | O                |   | X                |
 | O                |   | X  X             |
 | O        O  X  X |   | X  X           O |
 +12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count  X: 155  O: 147 X-O: 0-0
Cube: 1
X to play 11

Using all four ones to make the four point leaves the blots on the 7 and
8 points, so making the bar point seems to be better. Then I have three
more aces to play so I'll unstack the six point and step up to the 22 point.

24/22 8/7 6/5.

--
Ah....Clem
The future is fun, the future is fair.

--- SoupGate-Win32 v1.05
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XGID=-a---BEAAa--cD---cbe----B-:0:0:1:11:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O | | O X |
| X O O | | O X |
| X O | | O |
| X | | O |
| | | O |
| |BAR| |
| | | X |
| | | X |
| O | | X |
| O | | X X |
| O O X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 155 O: 147 X-O: 0-0
Cube: 1
X to play 11

After you've made your 5pt, making your 4pt with snake eyes is usually
better than making your bar point plus some other random aces. This is especially true when you might be hitting some blots soon, as here.

This position also illustrates something that I have been slow to learn,
which is that covering a blot on the bar point is not always better than leaving the bar point slotted and making the 4pt.

1. Rollout¹ 6/4(2) eq:+0.002
Player: 49.18% (G:16.62% B:0.55%)
Opponent: 50.82% (G:13.73% B:0.90%)
Confidence: ±0.015 (-0.013..+0.017) - [100.0%]

2. Rollout¹ 24/22 8/7 6/5 eq:-0.061 (-0.063)
Player: 47.62% (G:14.04% B:0.45%)
Opponent: 52.38% (G:12.84% B:0.52%)
Confidence: ±0.013 (-0.074..-0.049) - [0.0%]

¹ 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.211.pre-release

---
Tim Chow

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