<style>
.column-container {
    max-width: 180px;
}

.columns {
    box-sizing: border-box;
    -webkit-column-width: 100px;
    height: 300px;
}

img {
    max-width: 100%;
    max-height: 100%;
    margin-bottom: 10px;
}

#b {
    width: 180px;
    height: 90px;
}

#c {
    width: 150px;
    height: 300px;
}

#e, #g {
    width: 300px;
    height: 300px;
}

#d, #e {
    min-width: 20px;
    max-width: 20px;
    min-height: 20px;
    max-height: 20px;
}

#f, #g {
    width: auto;
    height: auto;
    min-width: 30px;
    min-height: 30px;
}
</style>

<div class="column-container">
    <div class="columns">
        <div><img id="a" src="badchess-wide.png"></div>
        <div><img id="b" src="badchess-wide.png"></div>
        <div><img id="c" src="badchess-tall.png"></div>
        <div><img id="d" src="badchess-wide.png"></div>
        <div><img id="e" src="badchess-wide.png"></div>
        <div><img id="f" src="badchess-wide.png"></div>
        <div><img id="g" src="badchess-wide.png"></div>
    </div>
</div>