I suggest playing Gladiator at (1M)-1NT, which is more effective against a major
suit opening, especially 1♠ . Aggressor can have 5 hearts at (1♠ )-1NT because 2♥
would be an underbid. We get an additional cuebid to invite with 3 hearts,
roughly equivalent to Puppet Stayman. There is also an indirect 3NT for choice
of games with 3 hearts.
This version of Gladiator originates from a BTU gadget
(1♠ )-1NT- STR ~BAL
2♣ ! (R) , Gladiator2♦ ♥ INV , 5+#2♠ ! STAY , INV +, 4=♥ 2♠ -3♠ ! Choice of games, e.g. MAX 3433 2NT! NF INV , 5+♣ 3X FG , 5+#3♠ ! SPL , 0–1♠ , 4=♥ 4♣ ♦ ! Leaping Michaels, 5+♥ , usually 5+# 4♥ S/O , 6+♥ 4♠ ! Leaping Michaels, 5+♦ , 5+♣
(1♠ )-1NT-2♣ - Gladiator
2♦ ! P/C 2♥ ! P/C , 5+♦ 2♠ ! MAX , 4=♥ , 4+♦
(1♠ )-1NT-2♣ ; 2♦ - P/C
P S/O , 5+♦ 2♥ S/O , 5+♥ 2♠ ! INV , 3=♥ 2NT BAL INV 3♣ S/O , 6+♣ 3♦ ♥ INV , 6+#3♠ ! SPL , 0–1♠ , 0–3♥ 3NT! Choice of games, 3=♥
Slow 3NT still has 3=♥ if RHO bids up to 2NT.
(1♠ )-1NT-(2♣ ♦ ♥ ♠ )- -
2NT! TRF LEB 3♣ ! TRF INV +, 5+♦ 3♦ ! TRF INV +, 5+♥ 3♥ ! FG STAY , 4=♥ 3♠ ! SPL , 0–1♠ , 4=♥
(1♠ )-1NT-(2♣ ♦ ♥ ♠ )-2NT- TRF LEB
3♣ ! P/C 3♣ -3♠ ! SPL , 0–1♠ , 0–3♥ 3♣ -3NT! Choice of games, 3=♥ 3♦ ! P/C , 5+♣ 3♥ ! P/C , MAX , 4+♦ , 4+♣
(1♠ )-1NT-(2NT); (3♠ )-P- -
X PEN , 3=♥ 3NT! Choice of games, 3=♥
I have not yet come up with how we utilize the slow cuebid.
(1♥ )-1NT- STR ~BAL
2♣ ! (R) , Gladiator2♦ ♠ INV , 5+#2♥ ! STAY , INV +, 4=♠ 2♥ -3♥ ! Choice of games, e.g. MAX 4333 2NT! NF INV , 5+♣ 3X FG , 5+#3♥ ! SPL , 0–1♥ , 4=♠ 4♣ ♦ ! Leaping Michaels, 5+♠ , usually 5+# 4♥ ! Leaping Michaels, 5+♦ , 5+♣ 4♠ S/O , 6+♠
(1♥ )-1NT-2♣ - Gladiator
2♦ ! P/C 2♥ ! P/C , 5+♦ 2♠ ! P/C , MAX , 4=♠ , 4+♦
(1♥ )-1NT-2♣ ; 2♦ - P/C
P S/O , 5+♦ 2♠ ! S/O , 5+♠ 2NT BAL INV 3♣ S/O , 6+♣ 3♦ ♠ INV , 6+#3♥ ! SPL , 0–1♥ , 0–3♠
Otherwise, I suggest ignoring the minor suit opening. Take the 1NT overcall as
a strong notrump opening .