[nikos59]

Hi all

I have some questions about a remarkable bidding sequence produced in
the Polish Liga finals by Kowalski-Bizon. By coincidence, this very sequence
is being discussed in another thread here, but I would not like to digress
their discussion which is about advanced relay theory

Here is the hand and bidding

Dealer: South
Vul: All
Scoring: IMP
♠ KQJT4
♥ T52
♦ K94
♣ 87

♠ A6 ♠ 872
♥ KJ984 ♥ AQ73
♦ 7 ♦ AQT8
♣ AKQT5 ♣ J4
♠ 953
♥ 6
♦ J6532
♣ 9632

West North East South
Bizon Balicki Kiwalski Zmudzinski
- - - Pass
1♣! 1♦! 1♠! Pass
1NT Pass 2♣! Pass
2♦! Pass 2♠! Pass
2NT! Pass 3NT Pass
4♣! Pass 4NT Pass
7♥ Pass Pass Pass

Apparently 1C is strong (not Polish probably) and 1D shows spades.
If possible, I would like an explanation of all the other bids of
Kowalski-Bizon!

Thanks in advance

Nikos Sarantakos