NORTH K54 AK9 6 AK8752 Q JT75 KQJT95 QT T973 Q8632 A3 J9   AJ862 4 8742 643

Dealer: West    Vul: Both   MP Scoring West 1 2 Pass North X 3 East 1 Pass South 1 Pass

East'll Overruff...East'll Overruff

South had fears of an East as short as North in diamonds, hence the rejection of bidding game with a great 8 (maybe a 9) opposite an advertised 16 or 17.
North could have introduced that club suit or maybe even just chanced game with that 19 points short a spade raise.
North took South's 1 bid to deny 9 points. With 8 points opposite an invitation, acceptance might have been best.
North at times might in the South position bid 1 with as little as 4 points.

4> 5- 0 2 2 4 2 7- 5- 7- 620 ---- -100 170 ---- 170 200 170 800 620 800