When West tried four hearts Rodwell could have doubled and collected 500 points.
But East was not interested in defending and tried six hearts.
West had to bid clubs, and was not inclined to double when South tried three hearts.
This immediately created a problem for North, who might have tried two hearts.
Chagas could not resist trying four hearts, however, expecting some distributional strength in the North hand.
West, fancying his defensive prospects, chose not to try five hearts which would have cost 500.
East raised to three clubs, and Akerman tried three hearts, hoping for a 4-4 fit but not getting it.
And if South tries seven hearts he could suffer a spade ruff.
East had a maximum for his original pass, and his points were in his partner's suits, so he tried four hearts.
If she had revealed her diamonds, South could have tried four hearts, reaching an unbeatable game.