3rd exchange for Exchange & Win No. 17
South is declarer in five no-trumps. What is the winning exchange?
What sequence of counter-exchanges follows?
The third winning exchange is to swap North's ♦4 for East's ♦3. The cost is (4-3)x2=2, as for the first exchange, but the sum of the pip values is only 7 instead of 19. Now the seesaw squeeze is not available, because North cannot play under the ♦4 in the endgame, allowing West to safely unguard spades.
North-South is now the losing side and we must find a counter-exchange that makes them the winning side again. The counter-exchange must be cheaper than the third exchange, so it must either cost less than 2 (i.e., 1) or must involve lower cards or a lower suit than diamonds, under Rules 6 and 7.
© Hugh Darwen, 2001
Date last modified: 11 March, 2017