How to verify checkboxes on maximum 2 in a row

How to verify the checkbox on a section, maximum 10, 2 in a row, and the checkbox is checked?

To verify checkbox is checked

Boolean isCheckboxChecked = 
    driver.findElement(By.xpath("//*[contains(@class, 'checkboxSection')]//input[@type='checkbox']")).isSelected();

To verify max checkbox on that section is 10

Boolean isCheckboxMaxTen = 
    driver.findElements(By.xpath("//*[contains(@class, 'checkboxSection')]//input[@type='checkbox']")).size() <= 10;

To verify max 2 checkbox in a row

Any idea how to verify max 2 checkbox in a row

if ((isCheckboxChecked == true) && (isCheckboxMaxTen == true) && (isCheckboxTwoInARow == true)){
    // Pass
}
else
{
    // Fail
}