Posted 2014-August-16, 09:47
Try with the recently practice relay system CHAOS:
1♦ = (10)11+, 5+♥ except 4♥ UNBAL, including 5♥5+♠
......1♥ = 8+, relay
1♠ = (10)11-14, MIN
......1NT = FG, relay
2♦ = 5 or 7 card ♥ w/ 1♦ OR 4♥ UNBAL
......2♥ = relay
3♦ = 4513 (start to probe 6♠)
......3♠ = RKCB in ♠
3NT = 1 or 4 KC (good news)
......4♦ = Traditional Spiral Scan
4♠ = w/ ♠Q, w/o ♥K (6♠ very likely)
......4NT = Parity Spiral Scan for ♣K, ♦K, ♥Q
5♦ = ♣ K or ♦K + ♥Q (i.e. ♣ K)
......5NT = Traditional Spiral Scan (confirm ♣ Q not missing, not ♦Q instead)
6♦ = w/ ♣Q, w/o ♦Q
......7♠ = S/O