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The correct play is to enter on Black’s 4 point, hitting Black’s blot, move one man 3 from White’s 6 point to White’s 3 point, hitting Black’s blot. What may seem to be an unnecessary exposure of a blot on your 3 point is an attempt by you to prevent Black from establishing this point. If your blot is not hit (Black has 13 chances out of 36 — any 3, double 1s, or double 2s), in all probability you will be able to establish this point yourself, thus creating a 5 long block and making Black’s position untenable.

An alternate use of your 3 to hit Black’s blot on your 10 point is incorrect for two reasons. One is that this move would give Black 13 chances to establish your 3 point (any 3, double 2s, or 1s). With the correct play Black has only 1 to chance to make your 3 point (double 3s). The second reason is that you have given Black a fourth man back. If he is fortunate, he will be able to make 2 points in your board, thus creating an effective position that will enable him to play a back game.

Rollout  Tom Keith 2013

Money play Black owns 2-cube White rolls 4-3 1296 games with VR Checker play: 3-ply Cube play: XG Roller

XGID=-a-aBCDC--a-dB---bbc-a---A:1:-1:1:43:0:0:0:0

	4-3:		Game	G	BG	Equity
1	bar/21*, 6/3*	W L	.7556 .2444	.5468 .0318	.0824 .0015	+0.9984

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List of Positions from Better Backgammon

Better Backgammon (1974), by Tim Holland