GiBensohl

[nullve]

[hv=https://www.bridgebase.com/tools/handviewer.html?lin=st||pn|nullve,~~M252e403,nullve,~~M917hpeq|md|4S8532HKDAK97432C2,SKQT64H9854DJCA97,S7H632D85CKQ86543,SAJ9HAQJT7DQT6CJT|sv|o|rh||ah|Board%2014|mb|1N|an|notrump%20opener.%20Could%20have%205M.%20--%202-5%20!C;%202-5%20!D;%202-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|2D|mb|2N!|an|Lebensohl%20-%20Forces%203C%20by%20partner%20--%20%20%20|mb|P|mb|3C|an|Forced%20--%202-5%20!C;%202-5%20!D;%202-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|3D|mb|3S!|an|Lebensohl%20--%204+%20!H;%2010+%20HCP;%20likely%20stop%20in%20!S%20|mb|P|mb|4H|an|2-5%20!C;%202-5%20!D;%204-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|P|mb|P|mb|P|pc|DK|pc|DJ|mc|12|]600|450[/hv]

 

Click on 3♠.

[nige1]

[hv=lin=st||pn|nullve,~~M252e403,nullve,~~M917hpeq|md|4S8532HKDAK97432C2,SKQT64H9854DJCA97,S7H632D85CKQ86543,SAJ9HAQJT7DQT6CJT|sv|o|rh||ah|Board%2014|mb|1N|an|notrump%20opener.%20Could%20have%205M.%20--%202-5%20!C;%202-5%20!D;%202-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|2D|mb|2N!|an|Lebensohl%20-%20Forces%203C%20by%20partner%20--%20%20%20|mb|P|mb|3C|an|Forced%20--%202-5%20!C;%202-5%20!D;%202-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|3D|mb|3S!|an|Lebensohl%20--%204+%20!H;%2010+%20HCP;%20likely%20stop%20in%20!S%20|mb|P|mb|4H|an|2-5%20!C;%202-5%20!D;%204-5%20!H;%202-5%20!S;%2015-17%20HCP;%2018-%20total%20points%20|mb|P|mb|P|mb|P|pc|DK|pc|DJ|mc|12|]300|300|

Nullve 'Click on 3♠.'

+++++++++++++++++++++++++++++++

Bizarre but, for a pleasant change, GIB West's hand matches the unlikely description.

[/hv]

[sfi]

Remember the robot thinks you have shown both majors. It is still a strange choice, but maybe not as strange as you are suggesting.