How to get to 6h

[emalka]

[handviewer=http://www.bridgebase.com/tools/handviewer.html?lin=pn|emalka,~~M44501,~~M44499,~~M44500|st%7C%7Cmd%7C4S56JKAHKD24JQAC68%2CS34789QH8D57C5TQK%2CSH234579JQD36KC7A%2C%7Crh%7C%7Cah%7CBoard%202%7Csv%7Cn%7Cmb%7Cp%7Cmb%7C1S%7Cmb%7Cp%7Cmb%7C2H%7Can%7CForcing%20two%20over%20one%20--%205%2B%20%21H%3B%2012%2B%20HCP%3B%2013%2B%20total%20points%3B%20forcing%20to%203N%20%7Cmb%7Cp%7Cmb%7C3D%7Cmb%7Cp%7Cmb%7C3N%7Can%7C5-6%20%21H%3B%205-%20%21S%3B%2012-18%20HCP%3B%2013%2B%20total%20points%3B%20partial%20stop%20in%20%21C%20%7Cmb%7Cp%7Cmb%7C4N%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7Cp%7Cpc%7CC3%7Cpc%7CC6%7Cpc%7CCQ%7Cpc%7CC7%7Cpc%7CCT%7Cpc%7CCA%7Cpc%7CC4%7Cpc%7CC8%7Cpc%7CDK%7Cpc%7CD8%7Cpc%7CD2%7Cpc%7CD7%7Cpc%7CD3%7Cpc%7CD9%7Cpc%7CDQ%7Cpc%7CD5%7Cpc%7CDA%7Cpc%7CS4%7Cpc%7CD6%7Cpc%7CDT%7Cpc%7CDJ%7Cpc%7CS3%7Cpc%7CH2%7Cpc%7CH6%7Cpc%7CD4%7Cpc%7CH8%7Cpc%7CH3%7Cpc%7CC2%7Cpc%7CSA%7Cpc%7CS8%7Cpc%7CH4%7Cpc%7CS2%7Cpc%7CSK%7Cpc%7CS9%7Cpc%7CH5%7Cpc%7CST%7Cpc%7CHK%7Cpc%7CS7%7Cpc%7CH7%7Cpc%7CHA%7Cpc%7CCJ%7Cpc%7CS5%7Cpc%7CCK%7Cpc%7CH9%7Cpc%7CSQ%7Cpc%7CHJ%7Cpc%7CHT%7Cpc%7CS6%7Cpc%7CC5%7Cpc%7CHQ%7Cpc%7CC9%7Cpc%7CSJ%7C] /400|300 [/handviewer]

Free robot MP.

Nobody got into the heart slam or game.

Why can't GIB bid 3♥ or 4♥ after 3♦?

Does ♥ rebid promise something different?