diff --git a/drama/src/rev-mc.c b/drama/src/rev-mc.c
index d0d71cf..70e1ac6 100644
--- a/drama/src/rev-mc.c
+++ b/drama/src/rev-mc.c
@@ -330,20 +330,26 @@ find_row_mask(std::vector<set_t> &sets,
     if (thread_num > 2) { thread_num -= 2; }
     for (int i = 0; i < thread_num; ++i) {
         workers.emplace_back([&] {
+            std::vector<uint64_t> masks;
             while (!found) {
-                uint64_t cur_mask = last_mask;
                 {
+                    masks.clear();
                     std::lock_guard<std::mutex> _(lock);
-                    cur_mask = row_mask;
+                    for (int i = 0; i < 10000 && row_mask < last_mask; ++i) {
+                        masks.push_back(row_mask);
+                        row_mask = next_bit_permutation(row_mask);
+                    }
                     if (row_mask >= last_mask) { break; }
-
-                    row_mask = next_bit_permutation(row_mask);
-                    // verbose_printerr("[LOG] - Cur Row mask: 0x%0lx \t\t bits: %s\n", cur_mask, bit_string(cur_mask));
                 }
 
-                if (resolve(cur_mask, found)) {
-                    std::lock_guard<std::mutex> _(lock);
-                    if (!found.exchange(true)) { row_mask = cur_mask; }
+                for (const auto &cur_mask : masks) {
+                    if (resolve(cur_mask, found)) {
+                        std::lock_guard<std::mutex> _(lock);
+                        if (!found.exchange(true)) {
+                            row_mask = cur_mask;
+                            break;
+                        }
+                    }
                 }
             }
         });