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.is2d .knight.white {background-image:url('/assets/piece/pixel/wN.svg')}
.is2d .bishop.white {background-image:url('/assets/piece/pixel/wB.svg')}
.is2d .rook.white {background-image:url('/assets/piece/pixel/wR.svg')}
.is2d .queen.white {background-image:url('/assets/piece/pixel/wQ.svg')}
.is2d .king.white {background-image:url('/assets/piece/pixel/wK.svg')}
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.is2d .knight.black {background-image:url('/assets/piece/pixel/bN.svg')}
.is2d .bishop.black {background-image:url('/assets/piece/pixel/bB.svg')}
.is2d .rook.black {background-image:url('/assets/piece/pixel/bR.svg')}
.is2d .queen.black {background-image:url('/assets/piece/pixel/bQ.svg')}
.is2d .king.black {background-image:url('/assets/piece/pixel/bK.svg')}