def main():
    h, w = list(map(int, input().split()))
    Ans = [[0]*w for _ in range(h)]
    if not h % 2:
        for y in range(0, h, 2):
            for x in range(w):
                Ans[y][x] = 1
        return Ans
    elif not w % 2:
        for y in range(h):
            for x in range(0, w, 2):
                Ans[y][x] = 1
        return Ans
    if (h, w) == (3, 3):
        return []
    if h != 3:
        for x in range(w):
            if not x % 2:
                for y in range(2, h):
                    Ans[y][x] = 1
            else:
                for y in range(2):
                    Ans[y][x] = 1
    else:
        for y in range(h):
            if not y % 2:
                for x in range(2, w):
                    Ans[y][x] = 1
            else:
                for x in range(2):
                    Ans[y][x] = 1
    return Ans

for _ in range(int(input())):
    Ans = main()
    if Ans:
        print("Yes")
        for ans in Ans:
            print("".join([str(1-a) for a in ans]))
    else:
        print("No")