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Memorizing reference positions

Posted By: Stick
Date: Saturday, 16 February 2013, at 7:04 p.m.

In Response To: Memorizing reference positions (christian munk-christensen)

I don't think everyone is on the same page as to what constitutes a reference position. I consider it any position that I may use as a reference to help me with a decision while playing. That means that the opening roll, all the replies, all the third rolls I have stocked up in my head are reference positions. That wildly exceeds twenty and may even take me to 4 digits.

There are also the more standard reference positions where I can extrapolate to other similar positions. Take the 3 positions below where I know how many gammons are lost. I can extrapolate the checker anywhere in between those points and know the gammon figure or even put multiple checkers in the outfield and give a dead accurate estimate thanks to those positions.





White is Player 2

score: 0
pip: 79
Unlimited Game
Jacoby Beaver
pip: 60
score: 0

Blue is Player 1
XGID=aBBBCCB--A---------dbbbbb-:1:-1:1:12:0:0:3:0:10
Blue to play 12

1.Rollout19/6eq: +0.966
Player:
Opponent:		97.62% (G:2.16% B:0.04%)
2.38% (G:0.00% B:0.00%)		Conf.: ± 0.002 (+0.964...+0.968)
Duration: 11.8 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 25892611
Moves: 3-ply, cube decisions: XG Roller
White is Player 2

score: 0
pip: 86
Unlimited Game
Jacoby Beaver
pip: 60
score: 0

Blue is Player 1
XGID=aBBBCCB--A--a------cbbbbb-:1:-1:1:12:0:0:3:0:10
Blue to play 12

1.Rollout19/6eq: +1.031
Player:
Opponent:		97.64% (G:8.60% B:0.05%)
2.36% (G:0.00% B:0.00%)		Conf.: ± 0.002 (+1.029...+1.033)
Duration: 19.9 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 25892611
Moves: 3-ply, cube decisions: XG Roller
White is Player 2

score: 0
pip: 91
Unlimited Game
Jacoby Beaver
pip: 64
score: 0

Blue is Player 1
XGID=aBBBBDBa----A------cbbbbb-:1:-1:1:16:0:0:3:0:10
Blue to play 16

1.Rollout112/6 5/4eq: +1.111
Player:
Opponent:		97.37% (G:17.32% B:0.06%)
2.63% (G:0.00% B:0.00%)		Conf.: ± 0.002 (+1.109...+1.113)
Duration: 21.6 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 25892611
Moves: 3-ply, cube decisions: XG Roller

I also don't have a reference position for a 20pt or 21pt or 22pt anchor holding game memorized per say but I have in the past (while giving lessons) noted that I could set up a position where I know it would be a borderline take/pass and I did it on the spot. Then there are the early game blitz reference positions which well exceed 20 also that I know the proper cube action and win/gammon breakdowns.

Whatever the number is on how many reference positions a person could know as I've defined it, I'll take the over.

Stick

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