prevent challenge nastyness
prevent challenge nastyness

by opening several challenge setups before the opponent blocks,
one could send a few challenges even after having been blocked

arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila,arex1337/lila,luanlv/lila,luanlv/lila,clarkerubber/lila,clarkerubber/lila,clarkerubber/lila,arex1337/lila,luanlv/lila,clarkerubber/lila,arex1337/lila,arex1337/lila,arex1337/lila,luanlv/lila,clarkerubber/lila,clarkerubber/lila,arex1337/lila,clarkerubber/lila